Trend analysis of lung cancer incidence and mortality in Grande Cuiabá, Mato Grosso, Brazil, 2000 to 2016

Juliana Fernandes Cabral Romero dos Santos Caló Flávio de Macêdo Evangelista Juliana Benevenuto Reis Julio Fernando Pinto Oliveira Fernanda Cristina da Silva de Lima Noemi Dreyer Galvão Ageo Mário Cândido da Silva About the authors

ABSTRACT:

Objective:

To analyses lung cancer incidence and mortality trends to gender and age group in Grande Cuiabá between 2000 to 2016.

Methods:

Study of times series applying incidence data from the Population-Based Cancer Registry of Cuiabá, and mortality data from Mortality Information System. Annual Percentage Change and the Average Annual Percentage Change were calculated in the incidence and mortality rate through the Joinpoint regression.

Results:

It was observed between men a decrease of -2,2% in the overall incidence of lung cancer during the term of 2000-2016 and by age range: 40 to 49 years (-4,2%), 60 to 69 years (-2,0%) and 70 to 79 years (-9,4%), in this last age group it was between 2000-2009. The general mortality was stable on historical series, nonetheless, a decline between men of 50 to 59 years (-3,5%) among 2006 to 2016 and of 70 to 79 years among 2002-20011 (-6,3%) were observed. The incidence trends among female individuals maintained stable whereas the overall mortality trends had an increase of 7,2% between 2000-2012 and decrease of -34,1% between 2012-2016. Amid women from 50 to 79 years, there was a raise, ranging from 3,5% to 3,9% between 2000-2016.

Conclusions:

There is an evident disparity between the trends analysis of incidence and mortality of lung cancer among men and women, that can be explained by changes in smoking over time, for example, the adherence or not of the smoking withdraw program besides social, cultural, economics differences and even biological.

Keywords:
Incidence; Mortality; Lung neoplasms; Tobacco use disorder; Health information systems; Epidemiology

INTRODUCTION

Cancer ranks second in the number of non-communicable chronic diseases (NCDs) that kill the most in the world11 World Health Organization. Noncommunicable diseases [Internet]. 2021 [cited on Aug 5, 2021]. Available at: https://www.who.int/news-room/fact-sheets/detail/noncommunicable-diseases
https://www.who.int/news-room/fact-sheet...
. It has stood out for the growth in its incidence and mortality worldwide, mainly due to the rapid aging of the population and increased exposure to risk factors for neoplasms22 Omran AR. The epidemiologic transition: a theory of the epidemiology of population change. 1971. Milbank Q 2005; 83(4): 731-57. https://doi.org/10.1111/j.1468-0009.2005.00398.x
https://doi.org/10.1111/j.1468-0009.2005...
. In 2020, cancer was among the leading causes in 183 countries33 Sung H, Ferlay J, Siegel RL, Laversanne M, Soerjomataram I, Jemal A, et al. Global cancer statistics 2020: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA Cancer J Clin 2021; 71(3): 209-49. https://doi.org/10.3322/caac.21660
https://doi.org/10.3322/caac.21660...
.

Lung cancer (LC) was the most common cancer in the world in 201844 Bray F, Ferlay J, Soerjomataram I, Siegel RL, Torre LA, Jemal A. Global cancer statistics 2018: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA Cancer J Clin 2018; 68(6): 394-424. https://doi.org/10.3322/caac.21492
https://doi.org/10.3322/caac.21492...
, coming to second place in 2020, whilst it remained the leading cause of cancer death33 Sung H, Ferlay J, Siegel RL, Laversanne M, Soerjomataram I, Jemal A, et al. Global cancer statistics 2020: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA Cancer J Clin 2021; 71(3): 209-49. https://doi.org/10.3322/caac.21660
https://doi.org/10.3322/caac.21660...
. In Brazil, for each year, from 2020 to 2022, a total of 17,760 new cases of LC are expected in men and 12,440 in women55 Instituto Nacional de Câncer José Alencar Gomes da Silva. Estimativa 2020: incidência de câncer no Brasil. Rio de Janeiro: INCA; 2019. Available at: https://www.inca.gov.br/sites/ufu.sti.inca.local/files/media/document/estimativa-2020-incidencia-de-cancer-no-brasil.pdf
https://www.inca.gov.br/sites/ufu.sti.in...
. Regarding mortality, LC was the first in deaths by type of cancer in men (13.8%/16,733) and the second in women (11.4%/12,621) in 201966 Instituto Nacional de Câncer. Atlas on-line de mortalidade. mortalidade proporcional não ajustada por câncer, Brasil ou região, homens, mulheres ou homens e mulheres, grupo CID e por ano ou período selecionado [Internet] 2021. Available at: https://www.inca.gov.br/MortalidadeWeb/pages/Modelo01/consultar.xhtml;jsessionid=4A4B6B030BC095819BE7F63237911F0F#panelResultado
https://www.inca.gov.br/MortalidadeWeb/p...
.

In Mato Grosso, 320 cases of LC were estimated in 2020. Of these, 210 occurred in men and 110 in women55 Instituto Nacional de Câncer José Alencar Gomes da Silva. Estimativa 2020: incidência de câncer no Brasil. Rio de Janeiro: INCA; 2019. Available at: https://www.inca.gov.br/sites/ufu.sti.inca.local/files/media/document/estimativa-2020-incidencia-de-cancer-no-brasil.pdf
https://www.inca.gov.br/sites/ufu.sti.in...
. In 2019, there were 314 deaths from this type of cancer, of which 205 were among men and 109 among women66 Instituto Nacional de Câncer. Atlas on-line de mortalidade. mortalidade proporcional não ajustada por câncer, Brasil ou região, homens, mulheres ou homens e mulheres, grupo CID e por ano ou período selecionado [Internet] 2021. Available at: https://www.inca.gov.br/MortalidadeWeb/pages/Modelo01/consultar.xhtml;jsessionid=4A4B6B030BC095819BE7F63237911F0F#panelResultado
https://www.inca.gov.br/MortalidadeWeb/p...
.

As modifiable risk factors for LC, lifestyle and socioeconomic, demographic, and environmental factors stand out77 Brasil. Ministério da Saúde. Secretaria de Vigilância em Saúde. Departamento de Análise de Situação de Saúde. Plano de ações estratégicas para o enfrentamento das doenças crônicas não transmissíveis (DCNT) no Brasil 2011-2022. Brasília: Ministério da Saúde; 2011. Available at: https://portaldeboaspraticas.iff.fiocruz.br/wp-content/uploads/2020/09/plano_acoes_enfrent_dcnt_2011.pdf
https://portaldeboaspraticas.iff.fiocruz...
. Among the non-modifiable ones, there are genetic factors and family history of LC88 Brasil. Instituto Nacional de Câncer. Ministério da Saúde. Câncer de pulmão - versão para profissionais de saúde [Internet]. 2018. Available at: https://www.inca.gov.br/tipos-de-cancer/cancer-de-pulmao/profissional-de-saude
https://www.inca.gov.br/tipos-de-cancer/...
. Smoking is the main risk factor for the disease88 Brasil. Instituto Nacional de Câncer. Ministério da Saúde. Câncer de pulmão - versão para profissionais de saúde [Internet]. 2018. Available at: https://www.inca.gov.br/tipos-de-cancer/cancer-de-pulmao/profissional-de-saude
https://www.inca.gov.br/tipos-de-cancer/...
, including passive exposure to tobacco as an important point for its occurrence55 Instituto Nacional de Câncer José Alencar Gomes da Silva. Estimativa 2020: incidência de câncer no Brasil. Rio de Janeiro: INCA; 2019. Available at: https://www.inca.gov.br/sites/ufu.sti.inca.local/files/media/document/estimativa-2020-incidencia-de-cancer-no-brasil.pdf
https://www.inca.gov.br/sites/ufu.sti.in...
.

Considering that LC plays a significant role at the epidemiological level and a public health problem both world- and nationwide44 Bray F, Ferlay J, Soerjomataram I, Siegel RL, Torre LA, Jemal A. Global cancer statistics 2018: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA Cancer J Clin 2018; 68(6): 394-424. https://doi.org/10.3322/caac.21492
https://doi.org/10.3322/caac.21492...
,55 Instituto Nacional de Câncer José Alencar Gomes da Silva. Estimativa 2020: incidência de câncer no Brasil. Rio de Janeiro: INCA; 2019. Available at: https://www.inca.gov.br/sites/ufu.sti.inca.local/files/media/document/estimativa-2020-incidencia-de-cancer-no-brasil.pdf
https://www.inca.gov.br/sites/ufu.sti.in...
, in addition to its disparate effects between men and women99 Malta DC, Abreu DMX, Moura L, Lana GC, Azevedo G, França E. Trends in corrected lung cancer mortality rates in Brazil and regions. Rev Saúde Pública. 2016; 50: 33. https://doi.org/10.1590/S1518-8787.2016050006209
https://doi.org/10.1590/S1518-8787.20160...
,1010 Lortet-Tieulent J, Renteria E, Sharp L, Weiderpass E, Comber H, Baas P, et al. Convergence of decreasing male and increasing female incidence rates in major tobacco-related cancers in Europe in 1988-2010. Eur J Cancer 2015; 51(9): 1144-63. http://doi.org/10.1016/j.ejca.2013.10.014
http://doi.org/10.1016/j.ejca.2013.10.01...
and the scarcity of studies on the subject in the central-west region of Brazil and in the state of Mato Grosso, the objective of this article was to analyze trends in incidence and mortality from LC according to gender and age range, in Grande Cuiabá, state of Mato Grosso, from 2000 to 2016.

METHODS

This is a time series study using incidence and mortality information for LC according to the International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), with code C33-C34, to both genders, between the age groups 40–49, 50–59, 60–69, 70–79, and 80 years old or older, in the Grande Cuiabá area, from 2000 to 2016.

This study is part of the extension project "Surveillance of cancer and its associated factors: updating of population-based and hospital records" (VIGICAN Project) and of a research entitled "Cancer and its associated factors: analysis of population-based and hospital-based records in Cuiabá–MT", in partnership with the Mato Grosso State Health Department (SES-MT) and the Public Ministry of Labor of the 23rd Region.

The incidence information came from the Population-Based Cancer Registry (Registro de Câncer de Base Populacional – RCBP) of Cuiabá, available on the RCBP System website (BasepopWeb), developed by the José Alencar Gomes da Silva National Cancer Institute (Instituto Nacional de Câncer José Alencar Gomes da Silva – INCA)1111 Sistema de Registro de Câncer de Base Populacional. Basepopweb. Instituto Nacional de Câncer José Alencar Gomes da Silva. Rio de Janeiro: INCA; 2005.. Information on deaths from the Mortality Information System (Sistema de Informação sobre Mortalidade – SIM) was made available by SES-MT.

The RCBP Cuiabá, whose coverage area is the municipalities of Cuiabá and Várzea Grande, was called the RCBP of Grande Cuiabá. The entire historical series of the registry was used, as cancer evolves slowly and progressively. Therefore, behavior changes are best evaluated over decades.

Incident cases were recorded by the RCBP based on the International Classification of Diseases for Oncology, 3rd edition (ICD-O3), and converted into ICD-101212 Organização Mundial da Saúde. CID-O. Classificação internacional de doenças para oncologia. 3ᵃ ed. São Paulo: Fundação Oncocentro de São Paulo; 2005. Available at: http://apps.who.int/iris/bitstream/handle/10665/42344/9241545348_por.pdf?sequence=5&isAllowed=y
http://apps.who.int/iris/bitstream/handl...
1414 Organização Mundial da Saúde. CID-10. Classificação estatística internacional de doenças e problemas relacionados à saúde. Volume 2. 10ᵃ rev. São Paulo: Edusp; 1997.. The variables analyzed from the RCBP and SIM databases were: gender (female; male; unknown), age (in years and categorized by age group), specific cause of cancer according to the ICD-O3, morphology and date of diagnosis (exclusive to the RCBP), underlying cause of death according to the ICD-10 and date of death (exclusive to SIM)1212 Organização Mundial da Saúde. CID-O. Classificação internacional de doenças para oncologia. 3ᵃ ed. São Paulo: Fundação Oncocentro de São Paulo; 2005. Available at: http://apps.who.int/iris/bitstream/handle/10665/42344/9241545348_por.pdf?sequence=5&isAllowed=y
http://apps.who.int/iris/bitstream/handl...
1414 Organização Mundial da Saúde. CID-10. Classificação estatística internacional de doenças e problemas relacionados à saúde. Volume 2. 10ᵃ rev. São Paulo: Edusp; 1997.. The quality of the information was assessed using the criteria of the International Agency for Research on Cancer1515 Parkin DM, Whelan SL, Ferlay J, Teppo L, Thomas DB. Cancer incidence in five continents vol. VIII. Lyon: International Agency for Research on Cancer; 2002. Available at: https://publications.iarc.fr/Book-And-Report-Series/Iarc-Scientific-Publications/Cancer-Incidence-In-Five-Continents-Volume-VIII-2002
https://publications.iarc.fr/Book-And-Re...
.

Cuiabá is the capital of the state of Mato Grosso and the most populous city, according to the latest census1616 Brasil. Instituto Brasileiro de Geografia e Estatística. Panorama. População no último censo 2010 [Internet]. 2020 [cited on Aug 5, 2020]. Available at: https://cidades.ibge.gov.br/brasil/mt/cuiaba/panorama
https://cidades.ibge.gov.br/brasil/mt/cu...
, with 551,098 inhabitants. Várzea Grande is the second largest city in the state and had a population of 252,596 in 2010.

Crude and age-adjusted incidence and mortality rates were calculated per 100,000 inhabitants. Incidence rates were calculated for each year between 2000 and 2016, dividing the number of new cases of LC by the population over the period and multiplying it by 100,000. Mortality rates for the same period were calculated by dividing the number of deaths from LC by the population over the period and multiplying it by 100,000. Specific crude rates were calculated for each age group, using 10-year intervals, and the incidence and mortality rates adjusted by the direct method, considering the standard world population proposed by Segi1717 Segi M. Cancer mortality for selected sites in 24 countries. Sendai: Department of Public Health, Tohoku University, School of Medicine; 1960. and modified by Doll and Cook1818 Doll R, Cook P. Summarizing indices for comparison of cancer incidence data. Int J Cancer 1967; 2(3): 269-79. http://doi.org/10.1002/ijc.2910020310
http://doi.org/10.1002/ijc.2910020310...
.

Joinpoint regression analysis was used to analyze trends in incidence and mortality. In this method, the annual percentage change (APC) was calculated, which is the direction and magnitude of the trend results; and the average annual percent change (AAPC), estimated by calculating the weighted geometric mean of the different APCs with weight equal to the segment size for each time interval. Both were estimated by modeling using the jointpoint method, using the calendar year as the regression variable1919 Kim HJ, Fay MP, Feuer EJ, Midthune DN. Permutation tests for joinpoint regression with applications to cancer rates. Stat Med 2000; 19(3): 335-51. http://doi.org/10.1002/(sici)1097-0258(20000215)19:3<335::aid-sim336>3.0.co;2-z
http://doi.org/10.1002/(sici)1097-0258(2...
,2020 Clegg LX, Hankey BF, Tiwari R, Feuer EJ, Edwards BK. Estimating average annual per cent change in trend analysis. Stat Med 2009; 28(29): 3670-82. http://doi.org/10.1002/sim.3733
http://doi.org/10.1002/sim.3733...
.

Joinpoint regression analysis is used to find the best model that tests whether multiple line fragments better explain a time trend than a single line (dependent variable: logarithmic rate transformation). It uses Monte Carlo permutation tests to compare different models (with 0, 1, …, or 5 joinpoints — depending on the size of the time series)1919 Kim HJ, Fay MP, Feuer EJ, Midthune DN. Permutation tests for joinpoint regression with applications to cancer rates. Stat Med 2000; 19(3): 335-51. http://doi.org/10.1002/(sici)1097-0258(20000215)19:3<335::aid-sim336>3.0.co;2-z
http://doi.org/10.1002/(sici)1097-0258(2...
.

When the model is defined, the APC or AAPC for each segment is calculated and used to describe, quantify the trend, and assess whether it is statistically significant. In this situation, the null hypothesis is APC or AAPC=0, that is, rates are neither increasing nor decreasing. Therefore, they are stable, and their respective 95% confidence intervals are presented2020 Clegg LX, Hankey BF, Tiwari R, Feuer EJ, Edwards BK. Estimating average annual per cent change in trend analysis. Stat Med 2009; 28(29): 3670-82. http://doi.org/10.1002/sim.3733
http://doi.org/10.1002/sim.3733...
. The analyses were performed using the Joinpoint Regression® software, version 8.3.6.11919 Kim HJ, Fay MP, Feuer EJ, Midthune DN. Permutation tests for joinpoint regression with applications to cancer rates. Stat Med 2000; 19(3): 335-51. http://doi.org/10.1002/(sici)1097-0258(20000215)19:3<335::aid-sim336>3.0.co;2-z
http://doi.org/10.1002/(sici)1097-0258(2...
. Individuals over 40 years of age were included in the analyses, to avoid a decrease in the time series, as cases below this age group were rare, an expected fact, since LC is more common in the age groups between 50 and 70 years2121 Brasil. Ministério da Saúde. Instituto Nacional de Câncer. Câncer de pulmão - versão para pacientes [Internet] 2021. Available at: https://www.inca.gov.br/tipos-de-cancer/cancer-de-pulmao
https://www.inca.gov.br/tipos-de-cancer/...
.

SES-MT authorized the use of the data and the publication of the results. The research project was submitted to the Research Ethics Committee of Hospital Universitário Júlio Müller (CEP-HUJM) and approved under opinion number 3.048.183, as well as the Research Ethics Committee of SES-MT, opinion number 3.263.744.

RESULTS

There were 22,345 new cases of all neoplasms, except in situ and non-melanoma skin, from 2000 to 2016, in Grande Cuiabá, in patients aged 40 years old and older. Of this total, 6.4% corresponded to lung cancer, that is, 1,436 new cases of LC, of which 63.28% occurred in males and 30.54% in the age group 60 to 69 years. In relation to females, most of the new cases occurred in the age group from 70 to 79 years (26.61%). As for mortality, 1,318 deaths were recorded in the period, 63.88% in males and 29.80% in the 60-69 age group. In women, the incidence was 26.89% also in the age group from 60 to 69 years.

There was a significant decrease in the overall incidence of LC in males over the period 2000–2016, with an APC/AAPC of -2.2 (95% confidence interval — 95%CI -4.0–-0.3). Regarding the trend of incidence of LC by age group in men, there were statistically significant decreasing trends in the age groups from 40 to 49 years — APC/AAPC=-4.2 (95%CI -7.7–-0.6) — and aged 60 to 69 — APC/AAPC=-2 (95%CI -3.7–-0.2) — in the period 2000-2016. In the age group from 70 to 79 years, when analyzing the joinpoints, two trends in the incidence of LC were identified, and a significant decrease was seen in the period 2000–2009 — APC=-9.4 (95%CI -16.6– -1.7) (Table 1).

Table 1
Trend of age-adjusted* lung cancer incidence rates in men from 2000 to 2016.

There was an increase of 1.5% per year in the historical series of the incidence of LC in females in the period 2000-2016, but without statistical significance (95%CI -0.6–3.6). The trends in the incidence of LC among the different age groups of women also tended to be stable (Table 2).

Table 2
Trend of age-adjusted* lung cancer incidence rates in women from 2000 to 2016.

Regarding the trend in general mortality from LC in men, the increase was not significant — APC/AAPC=5.6 (95%CI -3.5–15.5) — in the historical series, however, two joinpoints were observed in the age group from 50 to 59 years, dividing the historical series into three trends in mortality from LC in men (2000–2003; 2003–2006; and 2006–2016), with a significant decrease trend in the period from 2006 to 2016 — APC=-3.5 (95%CI -6.1–-0.9). Three joinpoints were also identified in the 70-79 age group and divided the series into four trends (2000–2002; 2002–2011; 2011–2014; and 2014–2016). In the period from 2002 to 2011, the decrease was statistically significant — APC=-6.3 (95%CI -10.0–-2.6) (Table 3).

Table 3
Trend in age-adjusted* lung cancer mortality rates in men from 2000 to 2016.

Regarding the trend in overall mortality from LC in women, the analysis identified a joinpoint that divided the series into two significant trends: an increase in the period 2000-2012, with APC=7.2 (95%CI 3.0–11.6); and a decrease in the period 2012-2016, with APC=-34.1 (95%CI -51.8–-9.9). In terms of LC mortality trends between age groups, in turn, no joinpoints were seen. The series was considered as a single trend of increased mortality, being significant in the age groups from 50 to 59 years old — APC=3.9 (95%CI 0.6–7.2) —, 60 to 69 years old — APC=3.7 (95%CI 0.3–7.2) —, and 70 to 79 years old — APC=3.5 (95%CI 0.1–7.0) (Table 4).

Table 4
Trend in age-adjusted* lung cancer mortality rates in women from 2000 to 2016.

DISCUSSION

The analysis presented in this study allowed us to assess trends in incidence and mortality from LC in male and female individuals by their respective age groups in the years 2000 to 2016 in the Grande Cuiabá area. The results showed that there was a decrease of -2.2% per year in the analysis of the incidence of LC in the studied period in males, but it was not statistically significant for females. Regarding the historical trend of deaths, there was stability of specific mortality by LC among males throughout the study period, while in females there was an increase of 7.2% per year in deaths between the years 2000 and 2012 and a decrease of -34.1% between 2012 and 2016.

The main risk factor for LC is smoking2222 Sá VK, Coelho JC, Capelozzi VL, Azevedo SJ. Lung cancer in Brazil: epidemiology and treatment challenges. Lung Cancer (Auckl) 2016; 7: 141-8. http://doi.org/10.2147/LCTT.S93604
http://doi.org/10.2147/LCTT.S93604...
; over two thirds of deaths from this cancer are related to tobacco use2323 São José BP, Corrêa RA, Malta DC, Passos VMA, França EB, Teixeira RA, et al. Mortalidade e incapacidade por doenças relacionadas à exposição ao tabaco no Brasil, 1990 a 2015. Rev Bras Epidemiol 2017; 20(Suppl 01): 75-89. http://doi.org/10.1590/1980-5497201700050007
http://doi.org/10.1590/1980-549720170005...
. Considering only the effect of tobacco, studies estimate the attributable risk of smoking as a causative agent of LC close to 90%99 Malta DC, Abreu DMX, Moura L, Lana GC, Azevedo G, França E. Trends in corrected lung cancer mortality rates in Brazil and regions. Rev Saúde Pública. 2016; 50: 33. https://doi.org/10.1590/S1518-8787.2016050006209
https://doi.org/10.1590/S1518-8787.20160...
.

Regarding the incidence of LC in men, there is a worldwide trend toward a decrease in smoking, contrary to what has been observed in women, which may reflect the patterns of adherence and cessation of smoking1010 Lortet-Tieulent J, Renteria E, Sharp L, Weiderpass E, Comber H, Baas P, et al. Convergence of decreasing male and increasing female incidence rates in major tobacco-related cancers in Europe in 1988-2010. Eur J Cancer 2015; 51(9): 1144-63. http://doi.org/10.1016/j.ejca.2013.10.014
http://doi.org/10.1016/j.ejca.2013.10.01...
. It is important to highlight that the tobacco control policy in Brazil has achieved positive results, and the prevalence of male smokers has been reduced by more than 50% between 1989 and 20082424 Brasil. Instituto Nacional de Câncer. Organização Pan-Americana da Saúde. Pesquisa especial de tabagismo – PETab: relatório Brasil. Rio de Janeiro: INCA; 2011. Available at: https://bvsms.saude.gov.br/bvs/publicacoes/pesquisa_especial_tabagismo_petab.pdf
https://bvsms.saude.gov.br/bvs/publicaco...
.

When comparing the incidences of LC between male age groups, a greater reduction was identified in older age groups, especially in the population aged 70 years old and older, as well as among those aged between 40 and 49 years. It was noticed that the downward trend in smoking between the years 1989 and 2009 has been higher among men, although the prevalence is still higher than among women. Possibly, anti-smoking actions and programs such as increased taxes on cigarettes, mandatory display of warning images, restriction of advertising at specific times, among others, have had a positive impact on men’s decision to quit smoking2525 Brasil. Ministério da Saúde. Instituto Nacional de Câncer. Observatório da política nacional de controle do tabaco. Dados e números da prevalência do tabagismo [Internet]. 2014 [cited on Aug 5, 2021]. Available at: https://www.inca.gov.br/observatorio-da-politica-nacional-de-controle-do-tabaco/dados-e-numeros-prevalencia-tabagismo
https://www.inca.gov.br/observatorio-da-...
.

Considering the effect of age and birth cohort, the aged population may tend to be more impacted by quitting smoking, as they are more fragile and have a greater number of health comorbidities2626 Peixoto SV, Firmo JOA, Lima-Costa MF. Health conditions and smoking among older adults in two communities in Brazil (The Bambuí and Belo Horizonte Health Surveys). Cad Saude Publica 2006; 22(9): 1925-34. http://doi.org/10.1590/S0102-311X2006000900024
http://doi.org/10.1590/S0102-311X2006000...
. Among younger men, the implementation of tobacco regulation policies, control over tobacco advertising and the increase in taxes on cigarettes seem to have contributed to younger adults having awakened to the harmful effects of smoking, since younger age groups are the most affected by such laws2727 Barreto IF. Tabaco: a construção das políticas de controle sobre seu consumo no Brasil. História, Ciências, Saúde 2018; 25(3): 797-815. http://doi.org/10.1590/S0104-59702018000400011
http://doi.org/10.1590/S0104-59702018000...
. Also, in relation to men, passive exposure to smoke, dust and fumes at work and the concomitant use of alcohol and other drugs tend to be higher than in women, impacting the incidence of LC2828 Piñeros M, Sierra MS, Forman D. Descriptive epidemiology of lung cancer and current status of tobacco control measures in Central and South America. Cancer Epidemiol 2016; 44 Suppl 1: S90-9. http://doi.org/10.1016/j.canep.2016.03.002
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,2929 Malhotra J, Malvezzi M, Negri E, La Vecchia C, Boffetta P. Risk factors for lung cancer worldwide. Eur Respir J 2016; 48(3): 889-902. http://doi.org/10.1183/13993003.00359-2016
http://doi.org/10.1183/13993003.00359-20...
.

However, the incidence of LC among women showed a tendency toward stability, even in the analysis stratified by age group. In this sense, still considering smoking as a risk factor, a national survey that analyzed people’s perception of pro-tobacco media identified that advertisements were more perceived by men (32.4%) than by women (25.4%)3030 Instituto Brasileiro de Geografia e Estatística. Pesquisa nacional de saúde: 2013: acesso e utilização dos serviços de saúde, acidentes e violências: Brasil grandes regiões e unidades da federação. Rio de Janeiro: IBGE; 2015. Available at:https://biblioteca.ibge.gov.br/visualizacao/livros/liv94074.pdf
https://biblioteca.ibge.gov.br/visualiza...
. Although there are fewer female smokers compared to men, the decrease in the number of smokers is smaller and may be associated with their physical characteristics, hormonal influence, and emotional factors3131 Global Burden of Disease Cancer Collaboration, Fitzmaurice C, Dicker D, Pain A, Hamavid H, Moradi-Lakeh M, et al. The global burden of cancer 2013. JAMA Oncol 2015; 1(4): 505-27. http://doi.org/10.1001/jamaoncol.2015.0735
http://doi.org/10.1001/jamaoncol.2015.07...
. It seems that the decision to quit and to seek a solution to tobacco dependence is also different between men and women. One study found that women were 31% less likely to quit compared to men, and actual successful quitting was also lower3232 Smith PH, Kasza KA, Hyland A, Fong GT, Borland R, Brady K, et al. Gender differences in medication use and cigarette smoking cessation: results from the International Tobacco Control Four Country Survey. Nicotine Tob Res 2015; 17(4): 463-72. http://doi.org/10.1093/ntr/ntu212
http://doi.org/10.1093/ntr/ntu212...
.

The general trend of LC mortality in men in the present study showed a historical trend toward stability. In Brazil, mortality from LC in men tends to decrease, as in several other countries in the world99 Malta DC, Abreu DMX, Moura L, Lana GC, Azevedo G, França E. Trends in corrected lung cancer mortality rates in Brazil and regions. Rev Saúde Pública. 2016; 50: 33. https://doi.org/10.1590/S1518-8787.2016050006209
https://doi.org/10.1590/S1518-8787.20160...
,2929 Malhotra J, Malvezzi M, Negri E, La Vecchia C, Boffetta P. Risk factors for lung cancer worldwide. Eur Respir J 2016; 48(3): 889-902. http://doi.org/10.1183/13993003.00359-2016
http://doi.org/10.1183/13993003.00359-20...
. Although LC has one of the shortest survival times compared to other cancers, it is also necessary to consider a cohort effect according to age group in relation to deaths, the pre-pathogenic period for the incidence of the disease, taking into account the time between the onset of the disease and the death of the individual.

Possibly, the effects of smoking prevention campaigns have had less influence on mortality than on the incidence of LC. As an example, the Tobacco Control Program was implemented in the state of Mato Grosso only after 20083333 Brasil. Mato Grosso. Secretaria de Estado de Saúde. Superintendência de Políticas de Saúde. Coordenadoria de Gestão da Política de Saúde. Plano estadual de saúde Mato Grosso – 2008/2011. Cuiabá: Secretaria de Estado de Saúde; 2010. and the law that prohibited smoking in places of collective use was only implemented in 20093434 Mato Grosso. Lei n° 9.256 de 27/11/2009. Proíbe o consumo de cigarros, cigarrilhas, charutos, cachimbos ou de qualquer outro produto fumígeno, derivado ou não do tabaco, na forma que especifica, e cria ambientes de uso coletivo livres de tabaco. Publicado no DOE-MT em 27 de novembro de 2009.. Despite the positive effect in the reduction of overall incidence and in some age groups of this cancer, the same may not have occurred with regard to mortality, although, in the analysis stratified by age group, significant mortality decline trends were identified in the age group from 50 to 59 years (2006-2016) and from 70 to 79 years old (2002–2011).

Unlike men, the historical series of general mortality from LC in women shows significant trends of increase in the period from 2000 to 2012 and of decrease between 2012 and 2016. At the beginning of the historical series3535 Carioli G, La Vecchia C, Bertuccio P, Rodriguez T, Levi F, Boffetta P, et al. Cancer mortality predictions for 2017 in Latin America. Ann Oncol 2017; 28(9): 2286-97. https://doi.org/10.1093/annonc/mdx301
https://doi.org/10.1093/annonc/mdx301...
, analyzing mortality data and population data of the World Health Organization and the Pan American Health Organization of Latin American countries using joinpoint models, mortality rates were increasing due to LC in most of the countries evaluated, including Brazil. This phenomenon was also observed in most countries of the world2929 Malhotra J, Malvezzi M, Negri E, La Vecchia C, Boffetta P. Risk factors for lung cancer worldwide. Eur Respir J 2016; 48(3): 889-902. http://doi.org/10.1183/13993003.00359-2016
http://doi.org/10.1183/13993003.00359-20...
. Also in this sense, a study that analyzed mortality rates in the regions of Brazil (1996-2011) identified that in the Southeast, South, and Midwest regions, the risk of mortality was higher among women and mortality tended to increase in females99 Malta DC, Abreu DMX, Moura L, Lana GC, Azevedo G, França E. Trends in corrected lung cancer mortality rates in Brazil and regions. Rev Saúde Pública. 2016; 50: 33. https://doi.org/10.1590/S1518-8787.2016050006209
https://doi.org/10.1590/S1518-8787.20160...
.

As for the downward trend in female deaths from 2012 to 2016, recent NCDs prevention campaigns and programs launched in the world and in Brazil in recent decades may have helped3636 Almeida L, Szklo A, Sampaio M, Souza M, Martins LF, Szklo M, et al. Global adult tobacco survey data as a tool to monitor the WHO Framework Convention on Tobacco Control (WHO FCTC) implementation: the Brazilian case. Int J Environ Res Public Health 2012; 9(7): 2520-36. https://doi.org/10.3390/ijerph9072520
https://doi.org/10.3390/ijerph9072520...
,3737 World Health Organization. Global Action Plan for the Prevention and Control of NCDs 2013-2020. Geneva: World Health Organization; 2013. Available at: http://www.who.int/nmh/events/ncd_action_plan/en/
http://www.who.int/nmh/events/ncd_action...
. A systematic review showed a reduction in global smoking rates from 34.9 to 25% in men and from 8.2 to 5.4% in women, mainly in developed countries and Latin America, reflecting the effects of efforts made by tobacco control programs, as in Panama and Brazil3838 GBD 2015 Tobacco Collaborators. Smoking prevalence and attributable disease burden in 195 countries and territories, 1990-2015: a systematic analysis from the Global Burden of Disease Study 2015. Lancet 2017; 389(10082): 1885-906. https://doi.org/10.1016/S0140-6736(17)30819-X
https://doi.org/10.1016/S0140-6736(17)30...
. In relation to the latter, the Ministry of Health, through INCA, has been developing national actions that make up the National Tobacco Control Program in an attempt to reduce the prevalence and deaths of smokers, articulating a tobacco treatment network in the Unified Health System (Sistema Único de Saúde – SUS), impacting the reduction of smoking on the reduction of mortality from LC3939 Brasil. Ministério da Saúde. Instituto Nacional de Câncer. Programa nacional de controle do tabagismo [Internet] 2005. Available at: https://www.inca.gov.br/programa-nacional-de-controle-do-tabagismo
https://www.inca.gov.br/programa-naciona...
.

Recently, anti-smoking actions have been developed, such as the Global Action Plan for the Prevention and Control of NCDs 2013–20203737 World Health Organization. Global Action Plan for the Prevention and Control of NCDs 2013-2020. Geneva: World Health Organization; 2013. Available at: http://www.who.int/nmh/events/ncd_action_plan/en/
http://www.who.int/nmh/events/ncd_action...
,4040 Khaltaev N, Axelrod S. Global lung cancer mortality trends and lifestyle modifications: preliminary analysis. Chin Med J (Engl) 2020; 133(13): 1526-32. https://doi.org/10.1097/CM9.0000000000000918
https://doi.org/10.1097/CM9.000000000000...
. A national survey carried out in Brazilian capitals concluded that in the period 2006–2019 there was a favorable evolution of some health indicators, such as the decrease in smoking in both genders4141 Brasil. Ministério da Saúde. Secretaria de Vigilância em Saúde. Departamento de Análise em Saúde e Vigilância de Doenças Não Transmissíveis. Vigitel Brasil 2019: vigilância de fatores de risco e proteção para doenças crônicas por inquérito telefônico: estimativas sobre frequência e distribuição sociodemográfica de fatores de risco e proteção para doenças crônicas nas capitais dos 26 estados brasileiros e no Distrito Federal em 2019. Brasília: Ministério da Saúde; 2020. Available at: https://bvsms.saude.gov.br/bvs/publicacoes/vigitel_brasil_2019_vigilancia_fatores_risco.pdf
https://bvsms.saude.gov.br/bvs/publicaco...
.

The general mortality trend by age group in women grew 7.2% per year between 2000 and 2012 and fell -34.1% between 2012 and 2016. It can be inferred that the anti-smoking actions initiated in the late 1990s have not produced a protective effect on the origin of the historical series and, as expected, this occurred between the last years evaluated (from 2012 to 2016).

In the evaluation by age group, there was a decreasing trend of -3.5% per year in the period from 2000 to 2016 among women aged 70 to 79 years. In the strata of older age groups, the prevalence of smoking showed a decrease with increasing age in non-institutionalized aged people1818 Doll R, Cook P. Summarizing indices for comparison of cancer incidence data. Int J Cancer 1967; 2(3): 269-79. http://doi.org/10.1002/ijc.2910020310
http://doi.org/10.1002/ijc.2910020310...
. Intrinsic characteristics of gender and socioeconomic and cultural profile lead older women to smoke less4242 Davim RMB, Torres GV, Dantas SMM, Lima VM. Estudo com idosos de instituições asilares no município de Natal/RN: características socioeconômicas e de saúde. Rev Latino-am Enfermagem 2004; 12(3): 518-24. https://doi.org/10.1590/S0104-11692004000300010
https://doi.org/10.1590/S0104-1169200400...
, which may be a possible explanation for the decrease in deaths from LC in women. This same decrease was also found in the years 2006 to 2016 in women aged 50 to 59 years, possibly also due to the later protective effect of anti-smoking campaigns and a decrease in deaths from LC.

According to INCA88 Brasil. Instituto Nacional de Câncer. Ministério da Saúde. Câncer de pulmão - versão para profissionais de saúde [Internet]. 2018. Available at: https://www.inca.gov.br/tipos-de-cancer/cancer-de-pulmao/profissional-de-saude
https://www.inca.gov.br/tipos-de-cancer/...
, mortality rate decreased by 3.8% in men and 2.3% per year in women in Brazil between 2011 and 2015, due to the reduction in smoking in this period. The institute also claims that the five-year survival rate is 15% in men and 21% in women. When the disease is diagnosed at an early stage, this rate increases to 56%.

Some considerations about the limitations of the present study must be made. The research used information from the RCBP and SIM. As for the first, one can consider the improvement of data quality control procedures and the search for improvement in the record, with routines of criticism that analyze the validity and consistency of the information, however, some problems of incompleteness and inconsistency of the data are not excluded4343 Pinto IV, Ramos DN, Costa MCE, Ferreira CBT, Rebelo MS. Completude e consistência dos dados dos registros hospitalares de câncer no Brasil. Cad Saúde Colet 2012; 20(1): 113-20..

Regarding the SIM, there may have been errors in filling out the death certificates. Physicians often record only the pathophysiological events that preceded death, such as cardiorespiratory arrest, heart failure, pulmonary edema, among others, but fail to correctly inform the underlying cause of death, according to the ICD-104444 Laurenti R, Jorge MHPM, Gotlieb SLD. Mortalidade segundo causas: considerações sobre a fidedignidade dos dados. Rev Panam Salud Publica 2008; 23(3): 349-56. criteria, leading to underreporting of some conditions. In addition, in many cases, the underlying cause of death is filled only as a malignant neoplasm, without specifying its location (C80)4545 Souza GS, Junger WL, Azevedo e Silva G. Tendência de mortalidade por câncer de pulmão em diferentes contextos urbanos do Brasil, 2000-2015. Epidemiol Serv Saúde 2019; 28(3): e2018421. https://doi.org/10.5123/S1679-49742019000300003
https://doi.org/10.5123/S1679-4974201900...
.

Differences are observed between the trends of incidence and mortality from LC between men and women, considering in a special way certain age groups and periods of the historical series. These differences are due to changes in tobacco use over time, such as adherence or not to the smoking cessation program, in addition to social, cultural, economic, and even biological differences.

Men and women respond differently to calls from health promotion and care services, which may explain the behavior of historical LC trends in relation to gender, but smoking is recognized as the main risk factor related to LC incidence trends.

The results of this study can guide the design and implementation of campaigns and strategies in the fight against smoking, resulting in a decrease in morbidity and mortality from LC in Mato Grosso and in Brazil.

  • Financial support: Secretaria de Estado de Saúde de Mato Grosso, funding the extension project "Vigilância de câncer e seus fatores associados: atualização de registro de base populacional e hospitalar" (contract 088/2016); and the Public Ministry of Labor of the 23rd Region, funding the research project "Câncer e seus fatores associados: análise de registro de base populacional e hospitalar" (technical cooperation agreement 08/2019).
  • Erratum

    https://doi.org/10.1590/1980-549720220014.supl.1erratum
    In the manuscript "Trend analysis of lung cancer incidence and mortality in Grande Cuiabá, Mato Grosso, Brazil, 2000 to 2016", DOI: https://doi.org/10.1590/1980-549720220014.supl.1, published in the Rev Bras Epidemiol 2022; 25: e220014.supl.1:
    On page 1 it was included:
    ASSOCIATED EDITORS: Elisete Duarte http://orcid.org/0000-0002-0501-0190, Gulnar Azevedo e Silva http://orcid.org/0000-0001-8734-2799
    SCIENTIFIC EDITOR: Cassia Maria Buchalla http://orcid.org/0000-0001-5169-5533

ACKNOWLEDGMENTS

To the Mato Grosso State Health Department for funding the extension project "Surveillance of cancer and its associated factors: updating the population-based and hospital registry"; to the Public Ministry of Labor of the 23rd Region for funding the research project "Cancer and its associated factors: population-based and hospital registry analysis"; and to the José Alencar Gomes da Silva National Cancer Institute, which contributed to the training of cancer registrars.

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Publication Dates

  • Publication in this collection
    24 June 2022
  • Date of issue
    2022

History

  • Received
    23 Aug 2021
  • Reviewed
    30 Sept 2021
  • Accepted
    15 Oct 2021
  • Preprint
    19 Apr 2022
Associação Brasileira de Pós -Graduação em Saúde Coletiva São Paulo - SP - Brazil
E-mail: revbrepi@usp.br