Abstract

This paper evaluates the knowledge of community health workers in complementary feeding and their association with sociodemographic characteristics, work routines and describes the resources available in primary care facilities to master this topic. We applied questionnaires to the responsible for health services and to community health workers, the latter consisting of a knowledge test that allowed the calculation of scores according to the number of correct answers in multiple-choice questions. There was a positive association with age, length of service, home visits to children under 24 months, providing guidance or seeking information about complementary feeding with the knowledge in feeding in the first 24 months of life. There were discrepant responses by health services and the community health workers regarding training, government materials and child growth monitoring. Greater mastery was noted in breastfeeding in relation to complementary feeding. Therefore, primary care facilities should provide support and resources to increase knowledge in complementary feeding through training and access to government materials.

Key words
Infant nutrition; Community health workers; Family health strategy; Child health services

Introduction

Food is a fundamental human right as it is the basis for survival¹1 Brasil. Ministério da Saúde (MS), Rede Internacional em Defesa do Direito de Amamentar (IBFAN). ENPACS: Estratégia Nacional Para Alimentação Complementar Saudável: Caderno Do Tutor. Brasília: IBFAN/MS; 2010. and is an essential factor in providing full growth, health and development during childhood²2 World Health Organization (WHO). Infant and young child feeding: model chapter for textbooks for medical students and allied health professionals. Geneva: WHO; 2009.. Inadequate dietary practices in the first years of life are strongly related to children’s morbimortality³3 Brasil. Ministério da Saúde (MS). Saúde da criança: aleitamento materno e alimentação complementar. 2ª ed. Brasília: DAB/MS; 2015.

4 Brasil. Ministério da Saúde (MS). Estratégia Nacional para Promoção do Aleitamento Materno e Alimentação Complementar Saudável no Sistema Único de Saúde: manual de implementação. Brasília: MS; 2015.^-55 Victora CG, Bahl R, Barros AJD, França GVA, Horton S, Krasevec J, Murch S, Sankar MJ, Walker N, Rollins NC. Breastfeeding in the 21st century: epidemiology, mechanisms, and lifelong effect. Lancet 2016; 387(10017):475-490.. According to recommendations, breastfeeding should be exclusive in the first semester and food should be introduced after six months, complementing breast milk⁶6 World Health Organization (WHO). Complementary feeding: report of the global consultation, and summary of guiding principles for complementary feeding of the breastfed child. Geneva: WHO; 2002..

It is estimated that breastfeeding and healthy complementary feeding promotion actions can reduce the occurrence of deaths in children under five years of age to 13% and 6%, respectively, in the world⁷7 Jones G, Steketee RW, Black RE, Bhutta ZA, Morris SS, Bellagio Child Survival Study Group. How many child deaths can we prevent this year? Lancet 2003; 362(9377):65-71.. Studies have shown that campaigns to promote breastfeeding have shown positive results over the last decades⁵5 Victora CG, Bahl R, Barros AJD, França GVA, Horton S, Krasevec J, Murch S, Sankar MJ, Walker N, Rollins NC. Breastfeeding in the 21st century: epidemiology, mechanisms, and lifelong effect. Lancet 2016; 387(10017):475-490.^,88 Brasil. Ministério da Saúde (MS). Pesquisa Nacional de Demografia e Saúde da Criança e da Mulher - PNDS 2006: dimensões do processo reprodutivo e da saúde da criança. Brasília: MS; 2009.^,99 Brasil. Ministério da Saúde (MS). II pesquisa de prevalência de aleitamento materno nas capitais brasileiras e Distrito Federal. Brasília: MS; 2009.. A similar progress has not been made in relation to complementary feeding worldwide⁶6 World Health Organization (WHO). Complementary feeding: report of the global consultation, and summary of guiding principles for complementary feeding of the breastfed child. Geneva: WHO; 2002.. Research reports that the introduction of food in Brazil occurs early and is of low quality⁸8 Brasil. Ministério da Saúde (MS). Pesquisa Nacional de Demografia e Saúde da Criança e da Mulher - PNDS 2006: dimensões do processo reprodutivo e da saúde da criança. Brasília: MS; 2009.

9 Brasil. Ministério da Saúde (MS). II pesquisa de prevalência de aleitamento materno nas capitais brasileiras e Distrito Federal. Brasília: MS; 2009.

10 World Health Organization (WHO). Complementary feeding in the WHO Multicentre Growth Reference Study. Acta Paediatr 2006; 450:27-37.^-1111 Bortolini GA, Gubert MB, Santos LMP. Consumo alimentar entre crianças brasileiras com idade de 6 a 59 meses. Cad Saude Publica 2012; 28(9):1759-1771.. On the other hand, food with high bioavailability of iron, which is extremely necessary in complementary food, are introduced late¹¹11 Bortolini GA, Gubert MB, Santos LMP. Consumo alimentar entre crianças brasileiras com idade de 6 a 59 meses. Cad Saude Publica 2012; 28(9):1759-1771.

12 Garcia MT, Granado FS, Cardoso MA. Alimentação complementar e estado nutricional de crianças menores de dois anos atendidas no Programa Saúde da Família em Acrelândia, Acre, Amazônia Ocidental Brasileira. Cad Saude Publica 2011; 27(2):305-316.^-1313 Machado AKF, Elert VW, Pretto ADB, Pastore CA. Intenção de amamentar e de introdução de alimentação complementar de puérperas de um Hospital-Escola do sul do Brasil. Cien Saude Colet 2014; 19(7):1983-1989.. Whether late or early, the introduction of food occurs incorrectly and is harmful to children’s health.

Responding to this situation are reports of poor guidelines on infant feeding by health professionals¹⁴14 Arimatea JE, Castro LMC, Rotenberg S. Práticas Alimentares de Crianças Menores de um Ano: as orientações de profissionais de saúde e as recomendações do Ministério da Saúde. Ceres 2009; 4(2):65-78.^,1515 Campos AAO, Cotta RMM, Oliveira JM, Santos AK, Araújo RMA. Aconselhamento nutricional de crianças menores de dois anos de idade: potencialidades e obstáculos como desafios estratégicos. Cien Saude Colet 2014; 19(2):529-538., including community health workers (CHWs) who, even with increased responsibilities, focus their practice on breastfeeding¹⁴14 Arimatea JE, Castro LMC, Rotenberg S. Práticas Alimentares de Crianças Menores de um Ano: as orientações de profissionais de saúde e as recomendações do Ministério da Saúde. Ceres 2009; 4(2):65-78.^,1616 Ávila MMM, Azevedo DV, Galvão MM, Moraes LM. Nutrição e saúde: o agente comunitário de saúde e as ações realizadas com crianças de 0-12 meses em Uruburetama (CE). Cad Saude Colet 2011; 19(3):341-347.

17 Coutinho SB, Lira PIC, Lima MC, Frias PG, Eickmann SH, Ashworth A. Promotion of exclusive breast-feeding at scale within routine health services: impact of breast-feeding counselling training for community health workers in Recife, Brazil. Public Health Nutri 2013; 17(4):948-955.^-1818 Leite AJM, Puccini RF, Atalah NA, Cunha ALA da, Machado MT. Effectiveness of home-based peer counselling to promote breastfeeding in the northeast of Brazil: A randomized clinical trial. Acta Paediatr 2005; 94(6):741-746. for children in the first two years of life. Thus, the promotion of healthy complementary food has become a priority of food and health public policies¹⁹19 Oliveira JM, Castro IRR, Silva GB, Venancio SI, Saldiva SRDM. Avaliação da alimentação complementar nos dois primeiros anos de vida: proposta de indicadores e de instrumento. Cad Saude Publica 2015; 31(2):377-394., and Brazil’s Breastfeeding and Feeding Strategy “Amamenta e Alimenta”, which proposes to promote breastfeeding and healthy complementary feeding for children under two years of age and improve the skills and abilities of health professionals in primary care⁴4 Brasil. Ministério da Saúde (MS). Estratégia Nacional para Promoção do Aleitamento Materno e Alimentação Complementar Saudável no Sistema Único de Saúde: manual de implementação. Brasília: MS; 2015. is one of these state policies.

Within the scope of primary care, the Community Health Workers Strategy (EACS) has existed since the early 1990s and was established and regulated in 1997²⁰20 Brasil. Portaria nº 1.886, de 18 de dezembro de 1997. Aprova as Normas e Diretrizes do Programa de Agentes Comunitários de Saúde e do Programa de Saúde da Família. Diário Oficial da União 1997; 18 dez.. These professionals are in charge of visiting families at least once a month, developing health promotion, disease and illness prevention and health surveillance activities through home visits and individual and/or group educational actions²¹21 Brasil. Ministério da Saúde (MS). Política Nacional de Atenção Básica/Ministério da Saúde. Brasília: DAB/MS; 2012.. The EACS is a transition to the Family Health Strategy (ESF)²²22 Brasil. Ministério da Saúde (MS). Programa agentes comunitários de saúde (PACS). Brasília: MS; 2001. or a way to aggregate CHWs to other primary care organization types²¹21 Brasil. Ministério da Saúde (MS). Política Nacional de Atenção Básica/Ministério da Saúde. Brasília: DAB/MS; 2012.. Promotion has an important role¹⁶16 Ávila MMM, Azevedo DV, Galvão MM, Moraes LM. Nutrição e saúde: o agente comunitário de saúde e as ações realizadas com crianças de 0-12 meses em Uruburetama (CE). Cad Saude Colet 2011; 19(3):341-347. in this model, where CHWs are the main professionals for strengthening integration between basic health services and the community²³23 Brasil. Ministério da Saúde (MS). O trabalho do agente comunitário de saúde. Brasília: MS; 2009..

In this context, this study is justified considering the characteristics and attributions of CHWs that assign them a fundamental role in the promotion of healthy complementary feeding, engaging with the community in a practical way, in simple and accessible language, since no study that evaluated the knowledge about complementary feeding of these professionals was identified in the literature review. To contribute to this debate, this paper aims to evaluate the knowledge of community health workers in complementary feeding and its association with sociodemographic characteristics, work routines, as well as to describe the resources available in the primary care facilities so that they have mastery in this topic.

Methods

This is a descriptive, quantitative study, with a census of community health workers (CHWs) in the urban area of Pelotas, which is located in the southern region of Rio Grande do Sul, Brazil. All of the city’s primary care facilities (UBSs) with Family Health Strategy (ESF) or the Community Health Workers Strategy (EACS) participated in the survey, totaling 29 locations. Only one UBS had an EACS team, while another facility had two ESF teams and one EACS team. In the remaining 27 UBSs, all the teams were of ESF. As of October 2015, there were 67 ESF teams and 329 CHWs enrolled in the Ministry of Health (MS) system, providing an estimated population coverage of 57.4%²⁴24 Brasil. Ministério da Saúde (MS). Teto, credenciamento e implantação das estratégias de Agentes Comunitários de Saúde, Saúde da Família e Saúde Bucal. [acessado 2016 Jun 13]. Disponível em: http://dab.saude.gov.br/portaldab/historico_cobertura_sf.php
http://dab.saude.gov.br/portaldab/histor... of 329,435 inhabitants²⁵25 Instituto Brasileiro de Geografia e Estatística (IBGE). Censo demográfico 2010. [acessado 2016 Jun 13]. Disponível em: https://cidades.ibge.gov.br/brasil/rs/pelotas/panorama
https://cidades.ibge.gov.br/brasil/rs/pe... . Eligible CHWs should be in full exercise of their professional activities in the urban area; therefore, those who were in any type of leave and who worked in the rural area of the municipality were excluded.

The application of the questionnaire was conducted from October 2015 to March 2016 at the UBSs by 24 undergraduate students of the Nutrition course selected and trained to apply the tool, and a nutritionist supervising fieldwork that attended all locations at least once during the data collection period. If any CHW was not available on the scheduled date or was on vacation, the research assistant himself made further attempts to apply the questionnaire, or, in cases of refusal, the supervisor was advised to make at least one reversal attempt.

Characterization of CHWs

Sociodemographic data and data related to complementary feeding (CF) in the work routine were obtained through a standardized questionnaire applied by CHW research assistants. Variables were gender, age in full years, self-reported skin color²⁶26 Instituto Brasileiro de Geografia e Estatística (IBGE). Conceitos. [acessado 2016 Ago 14]. Disponível em: https://www.ibge.gov.br/home/estatistica/populacao/condicaodevida/indicadoresminimos/conceitos.shtm
https://www.ibge.gov.br/home/estatistica... , length of service, schooling (considering the highest completed level), area of knowledge for those who have completed technical or higher education, home visits in the last month for children under 24 months old and to provide CF guidance in these visits and information about CF (sources of information that could contribute to the orientation of the CF, besides training and/or the materials of the Ministry of Health). For those last questions that referred to the month prior to the application of the tool, we considered the last month of work of CHWs who returned from leave.

Knowledge score

The outcome for this study was the knowledge score, evaluated by a self-administered questionnaire and prepared based on scientific literature²⁷27 Toma TS. Alimentação de crianças do Programa Saúde da Família (PSF): fatores associados à amamentação plena e impacto de um curso de aconselhamento em alimentação infantil nos conhecimentos de trabalhadores de saúde [tese]. São Paulo: Universidade Federal de São Paulo; 2008.^,2828 Brasil. Ministério da Saúde (MS). Dez passos para uma alimentação saudável: guia alimentar para crianças menores de dois anos: um guia para o profissional da saúde na atenção básica. 2ª Edição. Brasília: DAB/MS; 2013.. Responses of all questions were available on MoH’s material intended for primary health care professionals to provide guidance to the population on the healthy eating of Brazilian children under two years of age²⁸28 Brasil. Ministério da Saúde (MS). Dez passos para uma alimentação saudável: guia alimentar para crianças menores de dois anos: um guia para o profissional da saúde na atenção básica. 2ª Edição. Brasília: DAB/MS; 2013.. The tool contained 25 propositions, to which participants should point out (right, wrong or don’t know) according to what they considered to be MoH’s recommendation. The score was the product of the ratio between the questions correctly answered and the number of questions, ranging from 0.00 to 1.00 (0.00 - no correct answers and 1.00 - 25 correct answers)²⁷27 Toma TS. Alimentação de crianças do Programa Saúde da Família (PSF): fatores associados à amamentação plena e impacto de um curso de aconselhamento em alimentação infantil nos conhecimentos de trabalhadores de saúde [tese]. São Paulo: Universidade Federal de São Paulo; 2008.. The affirmations marked as “don’t know” were considered wrong answers in the calculation of the score. To describe results, the tool was divided into two modules: a breastfeeding module, with five questions and a complementary feeding module, with twenty questions, six of them about macro and micronutrients, and fourteen about health and behavior, which together made the overall knowledge module.

In order to ensure that there was no exchange of information between the participants or reading of educational materials, the research assistants remained present until all the participants completed the self-completion of the questionnaire.

A first pilot study was conducted out with students of the Nutrition course of the first and sixth semesters only with the knowledge test, and a second, in a UBS with ESF of the rural area of the municipality. Analyses and considerations regarding the tool’s reliability, besides the criticisms and suggestions of the participants in these two sub-studies were used for adjustments in the knowledge test to allow a better understanding by the target public.

Characterization of UBSs

The study supervisor applied a standardized questionnaire to the senior manager / professional of the UBS where the following variables were investigated: the profession of the participant, UBS work shifts to serve the population; group of pregnant women or mothers in the UBS; CF approach for the participants of these groups; childcare consultations, CF protocol of attendance in place; responsibility for drafting the protocol when referred to; human resources with technical qualification to provide guidance on CF and availability of infantometer and portable scale in the UBS.

Information from CHWs and responsible for the UBS

The questionnaires applied to CHWs and the UBS head contained questions with similar objectives, such as: difficulty in providing guidance on CF; conducting CF training; responsible for training when referred to; training workload, time since the last training. If the participant had referred more than one training, the following order was considered: idealized by governmental institution, the longest or most recent for each of the variables previously related. As for the MoH materials, we checked with CHWs only whether they were aware of any of them (they were not questioned about their frequent reading and/or use), while for the UBS responsible, we considered the availability of each of the five publications that contained the theme CF²⁸28 Brasil. Ministério da Saúde (MS). Dez passos para uma alimentação saudável: guia alimentar para crianças menores de dois anos: um guia para o profissional da saúde na atenção básica. 2ª Edição. Brasília: DAB/MS; 2013.

29 Brasil. Ministério da Saúde (MS), Organização Pan Americana da Saúde (OPAS). Guia alimentar para crianças menores de dois anos. Brasília: OPAS, MS; 2002.

30 Brasil. Ministério da Saúde (MS). Saúde da criança: nutrição infantil: aleitamento materno e alimentação complementar. Brasília: DAB, MS; 2009.

31 Brasil. Ministério da Saúde (MS), Rede Internacional em Defesa do Direito de Amamentar (IBFAN). Receitas regionais para crianças de 6 a 24 meses. Brasília: IBFAN, MS; 2010.^-3232 Brasil. Ministério da Saúde (MS). Alimentação Saudável para crianças menores de dois anos: álbum seriado. Brasília: DAB, MS; 2011.. In order to facilitate the identification of the information material, their covers were printed and plastified, and they were shown to both at the time of application of the questionnaires. Regarding the follow-up of the child growth, CHWs were questioned as to whether they assessed weight and height of infants up to 24 months, and those responsible for the UBS, whether these professionals performed the described task.

Statistical analysis

The data collected were included in the EpiData software (3.1), with double entry by different people, to check inconsistencies in data entry, allowing due corrections to obtain the final database for analysis. Stata 12.0 package was used for statistical analyses. Descriptive measures of frequency, mean and standard deviation are shown for the continuous variables and proportions for the categorical variables.

The knowledge score was evaluated continuously, evidencing a normal distribution; thus, in the crude analysis, the t-test was used for the associations with the dichotomous independent variables. The analysis of variance (ANOVA) or Kruskal-Wallis test in the lack of assumptions for the adoption of ANOVA was used to study the association of the outcome with the polytomous variables, and in the identification of pairs of means that differed, we used Bonferroni or Mann Whitney, respectively. The level of significance was set at 5% (p < 0.05).

Ethical aspects

The study protocol was approved by the Research Ethics Committee of the Faculty of Medicine of the Federal University of Pelotas. The written informed consent was obtained from the Municipal Health Secretariat of Pelotas and all participants signed the informed consent form (ICF). Authors declare that there is no conflict of interest in this study.

Results

Characterization of CHWs

Of the 267 CHWs in the urban area of Pelotas, 21 did not respond to the questionnaire. Of these, twelve were on leave (exclusion criterion), four refused and five were considered losses after more than one contact attempt, in addition to the supervisor’s visit. Thus, 246 participants or 96.6% of the total number of CHWs that monitor the urban population were included.

Table 1 shows the characterization of CHWs, with 90% women, mean age 36 years and SD ± 8.6 (data not shown in table). There was a similar distribution by age categories, with prevalence in the age range of 30-39 years (39.0%). Seventy-one percent were self-declared white, and most (54.9%) had been working for two years as CHWs, with a mean length of service of 41.5 months, ranging from zero to 240 months (data not shown in table).

As for schooling, more than half finished secondary school and eight completed only elementary school. Among those who completed technical education (n = 76), about one-third were in the health area. In relation to higher education (n = 33), approximately 20% completed graduation in the area of health sciences. The most mentioned technical courses were nursing (23.4%) and accounting (19.5%), and the same was not observed with regard to the undergraduate program, whose main highlights were social work (18.2%) and pedagogy (15.2% %) (data not shown in table).

Table 1 also shows that, in the month prior to the application of the questionnaire, almost all CHWs (93.9%) made a home visit for children under two years of age in their area of coverage. However, only a little more than one-third (37.7%) reported having conducted counseling on CF during these visits, while the search for information on CF was reported by about two-thirds of workers. This information could have been retrieved both in the media (45.4%) and by health professionals (46.7%) (data not shown in the table).

Knowledge score

Table 2 shows that, of the five questions related to breastfeeding, four evidenced a proportion of correct answers greater than 90%, and the length of exclusive breastfeeding had the second highest prevalence of correct answers (98.0%), just below the question on hygiene and adequate handling of food provided to the infant (99.6%). On the other hand, the highest proportion of wrong answers was in CF guidelines, such as including water between meals, in which only 17.1% of participants were correct.

Table 3 shows the overall knowledge scores and for each module. On average, the participants reached almost the 7^(th) grade, that is, they had a 68% success rate for all questions in the self-administered tool. Thus, the mean and median knowledge score was 0.68 (SD ± 0.11), with an amplitude of 0.20 to 0.88 correct answers, showing a normal distribution. In Table 3, the mean scores of knowledge in each module can be observed, emphasizing that the breastfeeding module (BF) showed the highest proportion of correct answers (88.0%), while for complementary feeding (CF), this figure was 62.0%.

In Table 4, when analyzing these scores in relation to the characteristics of CHWs, we observed higher means among older CHWs with differences between the categories of 19-29 and 30-39 years, who work longer, with differences in the categories of under 12 and 60 or more months, who conducted a home visit in the last month to a child under 24 months, who reported receiving information about CF and provided guidance to households.

While the knowledge score mean was higher for women, this difference was not statistically significant (p = 0.05 for the overall score and p = 0.10 for the CF score) and having received training was statistically significant only in the overall score (p = 0.04).

Characterization of UBSs

All 29 UBSs eligible for this study were included, since no responsible (or other non-CHW higher education professionals) refused to participate. The questionnaires with questions related to the health services were applied mainly to nurses (72.4%). Most UBSs (82.8%) serve the population in morning and afternoon shifts.

With regard to mother and child care, all the sites had childcare consultations and more than half (51.7%) had a group of pregnant women or mothers. However, CF was addressed in only 46.7% of the groups of those UBSs. Of the health services evaluated, 20 sites (69.0%) reported having a protocol to provide guidance to the population served in place. Of these, most (n = 12 or 60%) originated from government institutions. However, in nine UBSs, it was reported that the served population care protocol was elaborated by the service’s health professionals. Thus, in one of the facilities where a protocol from a governmental institution was also mentioned, another protocol was self-developed.

As for the permanent staff of all UBSs, the nutritionist appeared in 15 of them, representing 51.7% of the total, although no association was found between the availability of this professional in the health services and the scores of overall and CF knowledge of CHWs. Pediatricians were found in only six UBSs, representing 20.7% of the total. Regarding the availability of resources for CHW to monitor children’s growth in home visits, the infantometer was found in 28 sites (96.5%), while the portable scale was identified in only 11 UBSs (37.9%).

Information from CHWs and responsiblefor the UBS

Table 5 shows the distributions of the variables evaluated in both the questionnaire applied to CHWs and those applied to the professional responsible for the UBS. CHW training was more frequently reported by CHW (37% of participants) than in the UBS, where only three reported CF training for CHWs. However, responses were consistent with the main responsible for the training of the CHWs, since all reported more frequently receiving training from higher education institutions, that the training was short (up to four hours) and occurred more than 12 months earlier.

Another striking result is that it was reported that CHWs monitored child growth in 12 UBS. On the other hand, only five CHWs reported collecting anthropometric measurements of children monitored, disagreeing with the report made by UBSs’ heads.

Among the five MoH CF-related publications, the “Caderno de Atenção Básica, Saúde da criança: nutrição infantil, nº 23” was the material most identified by the CHWs, and was reported by only 15.4% of the participants and the most available in the UBSs, found in 20 of the 29 facilities (69.0%).

More than half of CHWs (57.7%) reported having some difficulty in providing guidance on CF, while almost all of the UBSs (96.5%) reported some difficulty. However, CHWs associated this hardship with their own limitations, while 21 (75.0%) of heads attributed it to the families’ constraints in providing adequate CF to children.

Discussion

Considering that CHWs are responsible for primary care because they are the link between families and the health service²¹21 Brasil. Ministério da Saúde (MS). Política Nacional de Atenção Básica/Ministério da Saúde. Brasília: DAB/MS; 2012., the knowledge of these professionals regarding adequate family guidance can have important repercussions to improve the practice of CF in his community. The results of this study conducted through the collection of primary data, with approximately all the CHWs operating in the urban area of a medium-sized city in the southern region of the country bring relevant inputs to be considered in the implementation of CHWs’ activities and their primary care actions, in Brazilian municipalities with characteristics similar to Pelotas, Rio Grande do Sul.

The studied population consisted almost exclusively of women, as well as in research with the same professionals, in which females represented more than 80% of the samples evaluated³³33 Musse JO, Marques RS, Lopes FRL, Monteiro KS, Santos SC. Avaliação de competências de Agentes Comunitários de Saúde para coleta de dados epidemiológicos. Cien Saude Colet 2015; 20(2):525-536.

34 Florindo AA, Brownson RC, Mielke GI, Gomes GAO, Parra DC, Siqueira FVN, Lobelo F, Simoes EJ, Ramos LR, Bracco MM, Hallal PC. Association of knowledge, preventive counseling and personal health behaviors on physical activity and consumption of fruits or vegetables in community health workers. BMC Public Health 2015; 15:344.^-3535 Santos CW dos, Farias FMC. Agentes Comunitários de Saúde: uma perspectiva do capital social. Cien Saude Colet 2016; 21(5):1659-1668., possibly due to the historical aspects of this profession and the type of work developed by the CHWs³⁶36 Vieira M, Durão AV, Lopes MR. Para além da comunidade: trabalho e qualificação dos agentes comunitários de saúde. Rio de Janeiro: Escola Politécnica de Saúde Joaquim Venâncio; 2011.. The highest level of education of most of the participants was complete secondary school level, corroborating with Florindo et al.³⁴34 Florindo AA, Brownson RC, Mielke GI, Gomes GAO, Parra DC, Siqueira FVN, Lobelo F, Simoes EJ, Ramos LR, Bracco MM, Hallal PC. Association of knowledge, preventive counseling and personal health behaviors on physical activity and consumption of fruits or vegetables in community health workers. BMC Public Health 2015; 15:344. and Ferraz and Aerts³⁷37 Ferraz L, Aerts DRGC. O cotidiano de trabalho do agente comunitário de saúde no PSF em Porto Alegre. Cien Saude Colet 2005; 10(2):347-355., who demonstrated a higher prevalence of CHWs with 9-11 years of schooling. A survey³⁸38 Mota RRA, David HMSL. A crescente escolarização do agente comunitário de saúde: uma indução do processo de trabalho? Trab Educ Saude 2010; 8(2):229-248. that evaluated CHWs’ schooling level found an increased level of schooling in this professional category, which can be noted considering that about 45% of individuals studied have a professional schooling level. An interesting result was that, among those who reported having completed higher education, the most prevalent courses did not belong to the health sector, and as described by Musse et al.³³33 Musse JO, Marques RS, Lopes FRL, Monteiro KS, Santos SC. Avaliação de competências de Agentes Comunitários de Saúde para coleta de dados epidemiológicos. Cien Saude Colet 2015; 20(2):525-536., human and social areas’ courses predominated. This construction shows a trend towards humanistic education among these professionals, which could indicate their potential to articulate policies of a social and economic nature³³33 Musse JO, Marques RS, Lopes FRL, Monteiro KS, Santos SC. Avaliação de competências de Agentes Comunitários de Saúde para coleta de dados epidemiológicos. Cien Saude Colet 2015; 20(2):525-536. and/or work temporarily as CHWs as an employment opportunity³⁵35 Santos CW dos, Farias FMC. Agentes Comunitários de Saúde: uma perspectiva do capital social. Cien Saude Colet 2016; 21(5):1659-1668..

The outcome of this research identified that little more than a third (35%) of CHWs knew the frequency of iron-rich food supply and 58.5% knew about the benefits of vitamin A-rich food, a result of concern considering that anemia and vitamin A deficiency are two of the main problems related to inadequate complementary feeding³3 Brasil. Ministério da Saúde (MS). Saúde da criança: aleitamento materno e alimentação complementar. 2ª ed. Brasília: DAB/MS; 2015.. When analyzing the CHWs’ knowledge on the feeding of children up to two years of age, it was verified that the module score with questions about breastfeeding (0.88) was higher than the score of complementary feeding module (0.62). In an intervention study²⁷27 Toma TS. Alimentação de crianças do Programa Saúde da Família (PSF): fatores associados à amamentação plena e impacto de um curso de aconselhamento em alimentação infantil nos conhecimentos de trabalhadores de saúde [tese]. São Paulo: Universidade Federal de São Paulo; 2008. with health professionals attending children enrolled in the ESF, except CHWs, and in another study³⁹39 Bassichetto KC, Réa MF. Infant and young child feeding counseling: an intervention study. J Pediatr 2008; 84(1):75-82. with pediatricians and nutritionists, knowledge about breastfeeding was also higher when compared to complementary feeding. It should be noted that both studies were carried out in the state of São Paulo and evaluated the effectiveness of the Integrated Course on Counseling Infant Feeding (WHO / UNICEF). The results of this study can still be corroborated with two other studies¹⁴14 Arimatea JE, Castro LMC, Rotenberg S. Práticas Alimentares de Crianças Menores de um Ano: as orientações de profissionais de saúde e as recomendações do Ministério da Saúde. Ceres 2009; 4(2):65-78.^,1616 Ávila MMM, Azevedo DV, Galvão MM, Moraes LM. Nutrição e saúde: o agente comunitário de saúde e as ações realizadas com crianças de 0-12 meses em Uruburetama (CE). Cad Saude Colet 2011; 19(3):341-347., which pointed out that the work of the ESF and CHW teams’ professionals regarding infant feeding has been focused on breastfeeding, with little emphasis on complementary feeding.

Regarding the different means found in the two scores (overall and complementary feeding) in relation to the age categories and the length of service of participants, this result corroborates with the national literature, which shows greater learning according to the experience accumulated in the health activity and increased information about the community³⁵35 Santos CW dos, Farias FMC. Agentes Comunitários de Saúde: uma perspectiva do capital social. Cien Saude Colet 2016; 21(5):1659-1668., referring to a higher level of knowledge derived from CHWs’ professional and personal experiences⁴⁰40 Nunes MO, Trad LB, Almeida BA, Homem CR, Melo MCIC. O agente comunitário de saúde: construção da identidade desse personagem híbrido e polifônico. Cad Saude Publica 2002; 18(6):1639-1646.^,4141 Maciazeki GRC, Souza CD, Baggio L, Wachs F. O trabalho do agente comunitário de saúde na perspectiva da educação popular em saúde: possibilidades e desafios. Cien Saude Colet 2016; 21(5):1637-1646., although no information on their maternity/paternity was obtained. With respect to positive associations found between scores and the following variables, namely, home visit to children under two years old, complementary feeding guidance and search of information sources, no previous studies were found that could help explain these results, but it is possible to suggest greater motivation of professionals who effectively provided guidance to the families in their area of activity. Thus, they could be seeking more information that would assist them in the assignments with guidance to the families and, therefore, obtaining greater knowledge.

According to the results, it was possible to observe that the CHWs reported training more frequently than reported by the UBSs’ heads. It should be noted that means of knowledge scores were higher for CHWs who received training. However, although it is known that training health professionals in order to promote dietary recommendations is essential to improving maternal knowledge and behavior⁴²42 Santos IS, Victora CG, Martines J, Gonçalves H, Gigante DP, Valle NJ, Pelto G. Avaliação da eficácia do aconselhamento nutricional dentro da estratégia do AIDPI (OMS/UNICEF). Rev Bras Epidemiol 2002; 5(1):15-29., only about four out of ten CHWs reported having received training. In a review paper, Campos et al.¹⁵15 Campos AAO, Cotta RMM, Oliveira JM, Santos AK, Araújo RMA. Aconselhamento nutricional de crianças menores de dois anos de idade: potencialidades e obstáculos como desafios estratégicos. Cien Saude Colet 2014; 19(2):529-538. noted that there is still a need to train health professionals to provide counseling for children under two years of age. As an alternative to the qualification of health professionals, the most recent policy of the Brazilian government in this area is the Brazilian Breastfeeding Strategy, whose one of the main objectives is the training of human resources in primary care to provide healthy eating guidance for children in the first 24 months of life⁴4 Brasil. Ministério da Saúde (MS). Estratégia Nacional para Promoção do Aleitamento Materno e Alimentação Complementar Saudável no Sistema Único de Saúde: manual de implementação. Brasília: MS; 2015..

It is worth pointing out that approximately all the CHWs (98.0%) do not follow up on child growth, although some UBSs’ heads reported believing that this task would have been performed by these professionals. A qualitative study carried out in the city of Uruburetama, Brazil, followed home visits of 15 CHWs to 16 families for a year and showed that the professionals were not adequately trained to monitor the weight of children in the first year of life and could not recognize nutritional risk situations¹⁶16 Ávila MMM, Azevedo DV, Galvão MM, Moraes LM. Nutrição e saúde: o agente comunitário de saúde e as ações realizadas com crianças de 0-12 meses em Uruburetama (CE). Cad Saude Colet 2011; 19(3):341-347..

Although those UBSs’ heads reported on the availability of government publications on the feeding of children under the age of two at the facility, few CHWs reported knowing them, possibly because this material is not accessible and/or because they have sought other sources of information, as reported by most of them. This finding should be highlighted, noting that at least one of the publications was available in more than two-thirds of the UBSs, while only about one in six CHWs has reportedly informed knowing its existence. Thus, while it is known that these documents are designed to qualify the health care teams, this study found that these materials are not available to CHWs and, at the same time, no information on the availability of materials to health teams was found.

It should be noted that, in the same month that the field research began, the Ministry of Health published a new version of the publication Caderno de Atenção Básica, Saúde da Criança: nutrição infantil, nº 23³3 Brasil. Ministério da Saúde (MS). Saúde da criança: aleitamento materno e alimentação complementar. 2ª ed. Brasília: DAB/MS; 2015.. However, considering that there would be no time for this new material to be distributed in the UBSs of the municipality, the cover figure of the previous publication³⁰30 Brasil. Ministério da Saúde (MS). Saúde da criança: nutrição infantil: aleitamento materno e alimentação complementar. Brasília: DAB, MS; 2009. was used to show to the participants. Thus, in the knowledge analysis, only one recommendation of the complementary feeding module - health and behavior - was changed. As a result, the score shown considered the most current reference³3 Brasil. Ministério da Saúde (MS). Saúde da criança: aleitamento materno e alimentação complementar. 2ª ed. Brasília: DAB/MS; 2015.. Analyses excluding this question from the tool or using the previous recommendation were performed, but results were similar.

Finally, it should be pointed out that this research aimed to evaluate the CHWs’ knowledge on complementary feeding, not reflecting on behavioral changes, whether in the behavior of the professional or of the families. However, it should be emphasized that knowledge is the first step toward behavioral change⁴³43 Prochaska JO, Redding CA, Evers KE. The Transtheoretical Model and stages of change. In: Glanz K, Lewis FM, Rimer BK, editors. Health Behavior and Health Education: Theory, Research, and Practice. 2nd ed. California: Jossey-Bass; 1997. p. 60-84.. Thus, results may contribute to the implementation of interventions that can influence the qualification of professionals’ actions, mainly related to complementary feeding of children up to two years of age, corroborating with intervention research in Porto Alegre (RS), which identified a positive impact of refreshing primary care professionals in relation to the Ten Steps of Healthy Eating for Children Under Two Years of Family Eating Practices in the first year of life⁴⁴44 Vitolo MR, Louzada ML, Rauber F, Grechi P, Gama CM. Impacto da atualização de profissionais de saúde sobre as práticas de amamentação e alimentação complementar. Cad Saude Publica 2014; 30(8):1685-1607.. In addition, no CHWs were studied in the rural area of the municipality.

This study enabled us to verify that CHWs have a better mastery of information about breastfeeding than about complementary feeding, and that receiving training improves the knowledge score about feeding children in the first two years of life and this should be stimulated in primary basic care, since only a little more than a third of the participants reported having received training to advise on complementary feeding. It should be pointed out that most of the UBSs have at least one copy of institutional publications containing guidelines on feeding children under two years of age. Efforts should be made to ensure that CHWs actually have access to these materials and encourage reading, understanding and appropriation of the contents, insofar as few mentioned knowing about the existence of the institutional materials, which in a way could be seen in the low scores of knowledge about CF found in this study. In view of these results, we can conclude that CHWs should assist in the promotion of adequate infant feeding, possibly due to their characteristics of proximity to families, frequent contact and understanding of socioeconomic and cultural barriers that prevent the introduction of adequate food. However, to ensure their effective role of interlocutors on complementary feeding in the households, the UBS must provide the necessary support and resources to obtain better and more updated knowledge on the subject. For this to happen effectively, the work process must be reviewed and improved, so that continued, quality education about CF for CHWs becomes a priority in the service. As such, it is an important factor in community food and nutrition education, stressing that one cannot expect families to have correct practices during complementary feeding if they are not adequately informed. Finally, we believe that further studies should be carried out with rural professionals to identify their constraints and that, at the same time, a training for CHWs working in the urban area of the municipality should be implemented.

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