A meta-analysis of trends in general, sexual, and violent recidivism among youth with histories of sex offending.

Recent research suggests that sexual recidivism rates have been declining, which contrasts with observations regarding general recidivism rates as well as perceptions of sexual reoffending risk. If sexual recidivism rates are in decline, it raises fundamental policy questions about the youth justice system's tendency to operate on the assumption that juvenile sexual offending is a risk marker for sexual reoffending in adulthood. A systematic review and a quantitative meta-analysis were conducted to determine the general, violent, and sexual recidivism rates of adolescent perpetrators of sexual offenses with data stemming from studies published worldwide between 1940 and 2019. A total of 158 empirical studies including 30,396 adolescent perpetrators of sexual offenses were retrieved to examine estimates of general, violent, and sexual recidivism. The study findings highlight that the risk of general recidivism (weighted pooled mean = .44) is substantially higher than violent (weighted pooled mean = .18) and sexual recidivism (weighted pooled mean = .08). The study did not observe convincing evidence that sexual recidivism rates for adolescent perpetrators are declining, but rather that these rates have been consistently low over the years. There was strong evidence that multiple study characteristics moderate the recidivism rates observed. Given the low weighted pooled sexual recidivism rate reported in the study, the use of adult-like strategies to increase public safety and prevent sexual recidivism seems misguided, not only because sexual recidivism is unlikely, but also because such strategies are not developed to address general criminogenic needs that may explain general recidivism rates observed.

Analysis of age, period, and birth cohort effects on suicide mortality in Brazil and the five major geographic regions.

OBJECTIVE: Estimate the effects of age, period, and birth cohort on suicide mortality in Brazil by major geographic region in the overall population and by sex. METHODS: This was a time trend ecological study. National and regional suicide mortality data from 1981 to 2020 were analyzed for the overall population and by sex. Age, period, and cohort effects were calculated with a Poisson regression model using estimable functions with the Epi package of the R statistical program, version 4.2.1. RESULTS: There were 272,716 suicides in individuals ranging from 20 to 79 years old. In the overall population, the age model-adjusted suicide mortality rates showed an upward pattern for Brazil. The most recent cohort showed the highest associated risk, 1.67 (95%CI 1.63; 1.71), while for the reference period, it was the highest risk among all the periods. CONCLUSIONS: Suicide mortality rates have shown an upward trend with advancing age in both men and women in the Brazilian population. However, the behavior of the period effect and cohort depends on the population analyzed and regional distribution.

Stomach cancer incidence trends in selected Latin America countries: Age, period, and birth-cohort effects.

BACKGROUND: to explore the age, period, and birth-cohort effects on stomach cancer incidence trends during 3 decades in selected Latin American countries. METHODS: a time-trend study was performed using Cancer Incidence in Five Continents data from high-quality population-based cancer registries(PBCRs) in Latin American countries. Crude and age-standardized incidence rates(ASRIs) were calculated. Time trends in ASRIs were assessed using the average annual percentage change(AAPC). Age-period-cohort effects were estimated by Poisson regression for individuals aged between 20 and 79 years with stomach cancer informed by PBCRs from 1983 to 2012 in Cali(Colombia); from 1982 to 2011 in Costa Rica; and from 1988 to 2012 for Goiania(Brazil) and Quito(Ecuador). The goodness-of-fit model was tested using the deviance of the models. RESULTS: a decrease in age-standardized incidence rates was observed for both genders in all populations covered by PBCRs, except for young men from Cali(AAPC 3.89 95 %IC: 1.32-7.29). The age effect was statistically significant in all areas, and the curve slope reached peaks in the older age groups. The cohort effect was observed in all PBCRs. Regarding the period effect, an increased ratio rate was observed for both genders in Costa Rica(1997-2001 women RR 1.11 95 %CI: 1.05-1.17; men RR 1.12 95 %CI: 1.08-1.17) and Goiânia(2003-2007 women RR 1.21 95 %CI: 1.08-1.35; men RR 1.09 95 %CI: 1.01-1.20), while Quito(1998-2002 women RR 0.89 95 %CI: 0.81-0.98; men RR 0.86 95 %CI: 0.79-0.93) presented a decrease. CONCLUSION: the present study showed a decreasing gastric cancer trend for over the past 30 years with gender and geographic variations. Such a decrease seems to be mainly a result of cohort effects, suggesting that the economic market opening process led to changes in the risk factor exposures over successive generations. These geographic and gender variations may reflect cultural/ethnic/gender differences and differences in dietary and smoking rate patterns. However, an increased incidence was observed for young men in Cali, and additional studies are needed to determine the cause of the increasing incidence in this group.

Age period cohort analysis of rheumatic heart disease in high-income countries.

INTRODUCTION: Rheumatic heart disease is considered well-controlled in high-income countries; however, its actual trends in mortality remain unclarified. We analyzed trends in mortality from rheumatic heart disease in association with age, period, and birth cohort. METHODS: We analyzed the WHO mortality database to determine trends in mortality from rheumatic heart disease in the UK, Germany, France, Italy, Japan, Australia, USA, and Canada from 2000 to 2020. We used age-cohort-period modeling to estimate cohort and period effects. Net drift (overall annual percentage change), local drift (annual percentage change in each age group) and heterogeneity were calculated. RESULTS: In the most recent year, crude mortality rates and age-standardized mortality rates ranged from 1.10 in the USA to 6.17 in Germany, and 0.32 (95% CI 0.31-0.34) in Japan and 1.70 (95% CI 1.65-1.75) in Germany, respectively. During the observation period, while Germany had a constant trend in overall annual percentage change, all the other countries had significant decreasing trends (p < 0.0001, respectively). Annual percent change was not homogeneous across each group in all 8 countries (pheterogeneity < 0.0001), with 2 peaks in the younger and older age categories. In Germany, Italy, Australia, and Canada, we found increasing mortality rates among older patients. Improving period and cohort risks for rheumatic heart disease mortality were generally observed, excluding Germany where the period effect was worsening and the cohort effect was constant. CONCLUSIONS: Mortality trends from rheumatic heart disease were decreasing in the study high-income countries except for Germany where higher mortality and two peaks in annual percentage change in younger and older age groups warrant further investigation.

Oral and oropharyngeal cancer mortality in Brazil, 1983-2017: Age-period-cohort analysis.

AIM: To estimate the effect of age, period, and birth cohort on mortality from oral and oropharyngeal cancer in Brazil. METHODS: Deaths due to oral and oropharyngeal cancer from 1983 to 2017 were analyzed. The effect of age, period, and cohort was calculated using the Poisson regression model. RESULTS: Between 1983 and 2017, 142,634 deaths were recorded from oral and oropharyngeal cancer in Brazil, 54% from oropharyngeal cancer. The male sex contributed to 81% of the deaths. The average mortality rate for men was 4.5 deaths per 100,000 inhabitants, and for women, it was 0.9 deaths per 100,000 inhabitants. There was a strong effect of age on mortality rates from oral and oropharyngeal cancer. The risk increases from 40 years of age in men and 55 years of age in women. An overall period effect was observed. The 2000 period showed the greatest risk when compared to the 1985 period in men. In women, the period of highest risk was 2010. The cohorts born between 1958 and 1962 had a higher risk of death. CONCLUSIONS: The period effect is mainly attributed to mortality from oropharyngeal cancer. Most significant values regarding the effect on the cohort groups were observed in female mortality from oral cancer.

Effects of age, period, and birth cohort on homicide mortality in the city of São Paulo, Brazil, from 1996 to 2015 / Efeitos de idade, período e coorte de nascimentos sobre mortalidade por homicídio na cidade de São Paulo, Brasil, entre 1996 e 2015 / Efectos de la edad, período, y cohorte de nacimiento en la mortalidad por homicidio, en la ciudad de Sao Paulo, Brasil, de 1996 a 2015

Abstract: Although São Paulo is the most populous city in Brazil - one of the world's most violent countries - a significant reduction in its homicide mortality rate (HMR) has been detected. This study aims to estimate the effects of age, period, and birth cohort on the trend of homicide mortality according to sex in the city of São Paulo, from 1996 to 2015. An ecological study was undertaken with data on deaths by homicide for both sexes, in all age brackets, in the city of São Paulo. Poisson models were adjusted for each sex to estimate the age-period-cohort effects. In total, 61,833 deaths by homicide were recorded among males and 5,109 among females. Regardless of the period, the highest HMR occurred in the 20-24 age bracket. Higher HMRs were found in those born in the 1970s and 1980s. The complete model, with age-period-cohort effects, were the best fit to the data. The risk of death by homicide declined over the periods, with lower intensity in the final five years (2011-2015), for both males (RR = 0.48; 95%CI: 0.46; 0.49) and females (RR = 0.52; 95%CI: 0.47; 0.57). A reduction was found in the risk of homicide, regardless of the sex or age bracket, and also in recent cohorts. However, the intensity of such reductions has been decreasing over time, which suggests that the public policies adopted have limited potential to maintain these achievements.

Resumo: Embora São Paulo seja a cidade mais populosa do Brasil, que é um dos países mais violentos do mundo, o município vem apresentando uma redução significativa na taxa de mortalidade por homicídio (TMH). O estudo buscou estimar os efeitos de idade, período e coorte de nascimentos na tendência da mortalidade por homicídio de acordo com sexo na cidade de São Paulo, entre 1996 e 2015. Foi realizado um estudo ecológico com dados sobre óbitos por homicídio em ambos os sexos, em todas as faixas etárias, no local e período mencionados acima. Foram ajustados modelos de Poisson para cada sexo, para estimar os efeitos de idade-período-coorte. Foram registrados 61.833 óbitos por homicídio em homens e 5.109 em mulheres. Independentemente do período, a TMH mais alta ocorreu na faixa etária de 20-24 anos. As TMH mais altas foram observadas em indivíduos que nasceram nas décadas de 1970 e 1980. O melhor ajuste para os dados foi como o modelo completo, com os efeitos de idade-período-coorte. O risco e óbitos por homicídio diminuiu ao longo dos anos, com a menor intensidade nos últimos cinco anos (2011-2015), tanto em homens (RR = 0,48; IC95%: 0,46; 0,49) quanto em mulheres (RR = 0,52; IC95%: 0,47; 0,57). Foi observada uma redução no risco de homicídio, independente de sexo ou faixa etária, como também, nas coortes mais recentes. Entretanto, a intensidade dessas reduções tem diminuído ao longo do tempo, sugerindo que as políticas públicas adotadas têm potencial limitado para manter os avanços alcançados.

Resumen: A pesar de que São Paulo es la cuidad más poblada en Brasil, uno de los países más violentos del mundo, ha estado mostrando una significativa reducción en su tasa de mortalidad por homicidios (TMH). Este estudio se propone estimar los efectos de la edad, período, y cohorte de nacimiento sobre la tendencia de la mortalidad por homicidio, según sexo, en la ciudad de Sao Paulo, de 1996 a 2015. Se realizó un estudio ecológico con datos sobre las muertes por homicidio en ambos sexos, en todos los grupos de edad, en el lugar y período mencionado previamente. Con el fin de estimar los efectos de la edad-período-cohorte, se ajustaron modelos Poisson para ambos sexos. Se registraron un total de 61.833 muertes por homicidio entre hombres y 5.109 entre mujeres. Independientemente del período, la TMH más alta se produjo en la franja de edad 20-24. Unas TMH más altas se observaron en quienes habían nacido en los 1970 y los 1980. El modelo completo, con los efectos edad-período-cohorte, fue la mejor manera de ajustar los datos. El riesgo de muerte por homicidio se redujo a lo largo de los períodos, con una intensidad más baja en los últimos cinco años (2011-2015), para tanto hombres (RR = 0,48; IC95%: 0,46; 0,49), como mujeres (RR = 0,52; IC95%: 0,47; 0,57). Se observó una reducción en el riesgo de homicidio, independientemente del sexo o franja de edad, así como en las cohortes recientes. No obstante, la intensidad de tales reducciones ha estado decreciendo a lo largo del tiempo, lo que sugiere que las políticas públicas adoptadas tienen un potencial limitado para mantener estos logros.

Analysis on the trend of AIDS incidence in Zhejiang, China based on the age-period-cohort model (2004-2018).

OBJECTIVE: To predict the trend of AIDS in specific age groups and to determine the objective population for AIDS screening, this study explored the three transmission routes and characterized each patient group using the APC model based on the whole, local, and immigrant populations in Zhejiang, China. METHODS: The data recruited in this paper was obtained from the national Comprehensive AIDS Prevention and Control Information System - Antiviral Therapy Management database and the Chinese Disease Prevention and Control Information System and the Statistical Yearbook of Zhejiang, China. An APC model was used to estimate the impact of age, period, and cohort on the incidence of AIDS, as well as to predict the AIDS incidence in specific age groups based on different sexes with different transmission routes. RESULTS: The AIDS incidence peaked in males aged 20-35 years; the incidence of males was higher than that of females due to the impact of period; obvious cohort effect was observed among the immigrants. In the whole and local populations, the incidences of males in all age groups and females in both the 35-year-old group and the whole age group were predicted to increase sharply in 5 years. In the immigrant population, the AIDS incidences in both sexes in all age groups were expected to increase significantly in 5 years. Under the influence of period, the incidence of AIDS via homosexual transmission in the whole population and the local population increased and remained stable after 2015. At the same time, the incidence of AIDS transmitted by homosexual and heterosexual routes in the immigrants also showed an increasing trend. CONCLUSIONS: The results elucidate that there are sex differences in AIDS incidence, and the incidence of AIDS through various transmission routes in all groups is predicted to exhibit an upward trend in the 5 years to come. Effective intervention strategies should be developed and implemented by the public health departments in Zhejiang to control the epidemic of AIDS.

Global Patterns and Trends in Lung Cancer Incidence: A Population-Based Study.

INTRODUCTION: Lung cancer (LC) has been the most common cancer worldwide for several decades. This study comprehensively examines recent geographic patterns and temporal trends in LC incidence from 1978 to 2012 in 43 countries and evaluates the effects of birth cohort and period on temporal trends. METHODS: Data were retrieved from the Cancer Incidence in Five Continents database. Joinpoint regression and age-period-cohort models were applied. RESULTS: The age-standardized rate was highest in Turkey (69.3 per 100,000 person-years) for men and in Denmark (36.7) for women in the period 2008 to 2012. Sex disparities were noted in most countries. From 1978 to 2012, a total of 19 countries had significantly declining trends among men, whereas 26 countries had significantly increasing trends among women (all p < 0.05). Quasi-reversed V-shaped and U-shaped incidence rate ratio trends indicating birth cohort effects were detected in 26 countries for men, with the highest risks mainly occurring in the 1930 to 1950 birth cohorts. However, the risks among recent generations have moderately increased in the People's Republic of China and Japan for men and sharply increased in Lithuania, Belarus, and Republic of Korea for women. Incidence rate ratio increases were steep among earlier birth cohorts and gradual among the post-1930s cohorts in 15 countries for women. Period effects were more evident than birth cohort effects in five countries for both sexes. CONCLUSIONS: Disparities in LC incidence and carcinogenic risk persist worldwide. Our findings identified high-risk target populations for primary prevention to reduce the LC incidence and highlighted the urgent need for etiologic studies to identify the reasons for pronounced cohort-specific risk increases in certain countries.

Cohort Change in the Prevalence of ADHD Among U.S. Adults: Evidence of a Gender-Specific Historical Period Effect.

Objective: To document inter- and intra-cohort changes in adult ADHD and examine whether changes vary by gender. Method: We analyze data from the 2007 and 2012 U.S. National Health Interview Survey. Results: The prevalence of ADHD among adults aged 18 to 64 years increased from 3.41% in 2007 to 4.25% in 2012. As expected, patterns of inter- and intra-cohort change varied by gender. At younger ages, inter-cohort gender differences are more distinct due to a spike in prevalence among boys/men born in or after 1980. Consistent with a gender-specific historical period effect, recent intra-cohort increases among women have narrowed the gender gap. Conclusion: The gender gap in the prevalence of ADHD among adults decreased by 31.1% from 2007 to 2012 due to increased prevalence among adult women of all ages. We discuss these results in relation to diagnostic practice, adult health and well-being, data limitations and needs, and directions for future research.

Efeitos temporais das estimativas de mortalidade corrigidas de homicídios femininos na Região Nordeste do Brasil / Temporal effects of corrected female homicide mortality estimates in Northeast Brazil / Efectos temporales de las estimaciones de mortalidad corregidas de feminicidios en la Región Nordeste de Brasil

O objetivo foi analisar os efeitos temporais (idade, período e coorte) na mortalidade por homicídios femininos nos estados da Região Nordeste do Brasil, no período de 1980 a 2017. Estudo ecológico de tendência temporal em que foram utilizados modelos APC com uma abordagem bayesiana e o método determinístico INLA (Integrated Nested Laplace Approximations) na inferência dos parâmetros. As taxas de homicídios femininos, para cada estado da região estudada, foram padronizadas pelo método direito, após correção dos registros de óbitos quanto à qualidade da informação e à subnotificação. Além disso, obtiveram-se dados segundo raça/cor, local de ocorrência e meio pelo qual a agressão foi perpetrada. No período estudado, após a correção dos registros de óbito, a Região Nordeste apresentou taxa média de 5,40 óbitos por homicídios a cada 100 mil mulheres, com aumento significativo em todos os estados nos anos 2000. Em todos os estados houve aumento do risco de óbito (RR) por homicídio na segunda e terceira década de vida e efeito de proteção para as mulheres mais velhas. Com exceção de Sergipe, constatou-se aumento do risco de óbito em quinquênios dos anos 2000. Na Região Nordeste e estados da Paraíba, Pernambuco e Piauí, verificou-se efeito protetor para mulheres de gerações mais antigas. Ainda, a maior proporção de óbitos ocorreu em mulheres negras, no domicílio, sendo perpetrado por arma de fogo. Os achados do presente estudo podem estar correlacionados ao processo de disseminação da violência ocorrido no Brasil, nos anos 2000, assim como a ineficiência do Estado brasileiro em proteger as mulheres vítimas de violência.

This study aimed to analyze the temporal effects (age, period, and cohort) on female homicide mortality in the states of Northeast Brazil from 1980 to 2017. This ecological time trend study used APC with a Bayesian approach and the deterministic method Integrated Nested Laplace Approximations (INLA) in the parameters' inference. The female homicide rates for each state of the Northeast were standardized by the direct method after correction of the death records for quality of information and underreporting. Data were also obtained on race/color, place of death, and means of perpetration. During the period analyzed, after correcting the death records, the Northeast region showed a mean rate of 5.40 female homicide deaths per 100,000 women, with a significant increase in all the states in the 2000s. In all the states, there was an increase in relative risk (RR) of homicide death in the second and third decades of life and a protective effect in older women. Except for the state of Sergipe, there was an increase in the risk of death in all five-year periods in the 2000s. The Northeast region as a whole and the states of Paraíba, Pernambuco, and Piauí showed a protective effect for women from older generations. There were also higher proportions of deaths in black women, homicides committed at home, and those perpetrated with firearms. The current study's findings may correlate with the spread of violence in Brazil in the 2000s and the Brazilian State's failure to protect women from violence.

Analizar los efectos temporales (edad, período y cohorte) en la mortalidad por feminicidios en los estados de la región Nordeste de Brasil durante el período de 1980 a 2017. Estudio ecológico de tendencia temporal en el que se utilizaron modelos APC con un abordaje bayesiano y el método determinístico INLA (Integrated Nested Laplace Approximations) para la inferencia de los parámetros. Las tasas de feminicidios, para cada estado de la región estudiada, fueron estandarizadas por el método directo, tras la corrección de los registros de fallecimientos, en cuanto a la calidad de la información y a la subnotificación. Asimismo, se obtuvieron datos según raza/color, lugar de ocurrencia y medio por el que se perpetró la agresión. Durante el período estudiado, tras la corrección de los registros por fallecimiento, la región Nordeste presentó una tasa media de 5,40 óbitos por feminicidio en cada 100.000 mujeres, con un aumento significativo en todos los estados a partir del año 2000. En todos los estados hubo un aumento del riesgo de óbito (RR) por homicidio en la segunda y tercera década de vida y efecto de protección para las mujeres mayores. Con excepción del estado de Sergipe, se observó un aumento del riesgo de fallecimientos en quinquenios de los años 2000. En la región Nordeste y estados de Paraíba, Pernambuco y Piauí se verificó un efecto protector para las mujeres de generaciones mayores. Asimismo, la mayor proporción de fallecimiento se produjo en mujeres negras, en el domicilio, siendo perpetrado por arma de fuego. Los resultados del presente estudio pueden estar correlacionados con el proceso de diseminación de la violencia, ocurrido en Brasil a partir del año 2000, así como la ineficiencia del Estado brasileño para proteger a las mujeres víctimas de violencia.

Mortality from oral and oropharyngeal cancer: age-period-cohort effect, Brazil, 1983-2017 / Mortalidade por câncer de boca e orofaringe: efeito idade-período-coorte, Brasil, 1983-2017

ABSTRACT OBJECTIVE Estimate the effect of age, period, and birth cohort on mortality from oral and oropharyngeal cancer in Brazil and its macro-regions. METHODS Deaths from oral and oropharyngeal cancer from 1983 to 2017 were analyzed. The Poisson regression model was applied, using estimable functions proposed by Holford. RESULTS From 1983 to 2017, 142,634 deaths from oral and oropharyngeal cancer were registered in Brazil, 81% among men, and the South and Southeast regions had the highest rates. The most significant period effects were observed in male mortality in the Southeast and Central-West regions for the 2003-2007 reference period. In the North, Northeast, and Central-West regions, an increased risk of mortality was observed in the most recent male cohorts. In the North region, the most significant risk identified was for men born during 1973-1977 (RR = 1.47; 95%CI 1.05-2.08); in the Northeast, for men born during 1988-1992 (RR = 2.77; 95%CI 1.66-4.63); and in the Central-West, for women born during 1973-1977 (RR = 2.01; 95%CI 1.19-3.39). In the Southeast and South regions, the most recent cohorts had lower mortality rates. The lowest risk in the Southeast region was observed in the male cohort born during 1978-1982 (RR = 0.53; 95%CI 0.45-0.62) and 1983-1987 in the South region (RR = 0.25; 95%CI 0.12-0.54). CONCLUSIONS Age had a significant effect on mortality from oral and oropharyngeal cancer in all regions. In the North, Northeast, and Central-West regions, an increase in risk was observed in the most recent cohorts, while in the South and Southeast regions, these cohorts presented a lower risk when compared to the older cohorts.

RESUMO OBJETIVO Estimar o efeito da idade, período e coorte de nascimento na mortalidade por câncer de boca e orofaringe no Brasil e suas macrorregiões. MÉTODO Foram analisados os óbitos por câncer de boca e orofaringe de 1983 a 2017. Aplicou-se o modelo de regressão de Poisson, utilizando funções estimáveis propostas por Holford. RESULTADOS No período de 1983 a 2017, foram registrados no Brasil 142.634 óbitos por câncer de boca e orofaringe, 81% entre o sexo masculino, e as regiões Sul e Sudeste apresentaram as taxas mais altas. Os maiores efeitos de período foram observados na mortalidade masculina das regiões Sudeste e Centro-Oeste para o período de referência 2003-2007. Nas regiões Norte, Nordeste e Centro-Oeste foi observado aumento do risco de mortalidade nas coortes masculinas mais recentes. Na região Norte o maior risco identificado foi para homens nascidos entre 1973 e 1977 (RR = 1,47; IC95% 1,05-2,08); no Nordeste, para homens nascidos entre 1988 e 1992 (RR = 2,77; IC95% 1,66-4,63); e no Centro-Oeste, para mulheres nascidas entre 1973 e 1977 (RR = 2,01; IC95% 1,19-3,39). Nas regiões Sudeste e Sul, as coortes mais recentes apresentaram taxas de mortalidade mais baixas. O menor risco na região Sudeste foi observado na coorte masculina nascida entre 1978 e 1982 (RR = 0,53; IC95% = 0,45-0,62), e entre 1983 e 1987 na região Sul (RR = 0,25; IC95% 0,12-0,54). CONCLUSÕES A idade teve efeito significativo na mortalidade por câncer de boca e orofaringe em todas as regiões. Nas regiões Norte, Nordeste e Centro-Oeste, foi observado aumento do risco nas coortes mais recentes, enquanto nas regiões Sul e Sudeste essas coortes apresentaram risco menor quando comparadas às coortes mais antigas.

Incidence of Colorectal Cancer in Selected Countries of Latin America: Age-Period-Cohort Effect.

OBJECTIVE: To estimate Age-Period-Cohort effects on colorectal, colon and rectal cancer incidence rates in Latin American countries covered by high quality population-based cancer registries. METHODS: A trend study was performed using data from Cancer Incidence in Five Continents. Age-Period-Cohort effects were estimated by Poisson regression for individuals aged between 20 and 79 years with colorectal, colon and rectal cancers informed by Population-Based Cancer Registries from 1983 to 2012 in Cali (Colombia); from 1983 to 2007 in Costa Rica; and from 1988 to 2012 for both Goiânia (Brazil) and Quito (Ecuador). Goodness of fit model was tested using the deviance of the models. RESULTS: Age effect was statistically significant for both sexes in all Population-Based Cancer Registries areas and the curves slope reached peaks in the older age groups. There were cohort effects on the incidence rates for colorectal, colon and rectal cancers in all Population-Based Cancer Registries areas, except for women in Quito. Regarding the period effect, an increased ratio rate was observed in men (1.26, 95%CI 1.17 to 1.35) and women (1.23, 95%CI, 1.15 to 1.32) in Goiânia, between 2003 and 2007. CONCLUSIONS: In Latin America, age effect was observed on incidence rates for colorectal, colon and rectal cancers. Besides, birth cohort effect was identified for recent cohorts in both genders for colorectal, colon and rectal cancers in Cali and Goiânia, and cohort effect for colorectal and colon cancers in both genders in Costa Rica; while in Quito a cohort effect was only observed for rectal cancer among men. Period effect was observed in Goiânia with increased ratio rate in 2003-2007.
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Does Drinking Initiation of Young Thai Drinkers Vary Over Time and Generation? Results of the National Surveys on Tobacco and Alcohol Consumption of the Thai Populations 2007 to 2017.

BACKGROUND: Early age at drinking initiation may be one factor responsible for underage drinking in Thailand and this may be affected by cultural and generational changes over certain periods of time. This study aimed to explore the effects of time period and generation on drinking onset of young Thai drinkers in the past decade. METHODS: We analyzed data from a total of 60,018 Thais aged 15 to 24 years from 4 national surveys conducted in 2007, 2011, 2014, and 2017. We used multilevel and event history analysis to examine the effects of period (survey year) and cohort (birth year of participants), adjusted for sex, age, area of residence, and region on drinking onset. RESULTS: The overall prevalence of past-year drinking was 23.6 % (95% confidence interval [CI]: 23.2, 23.9) among participants of all surveys. Cox proportional hazards model revealed significantly different probabilities to have initiated drinking between participants of different surveys and birth years, indicating significant period and cohort effects. After adjusting for sex, age, cohort, living region, and area of residence, participants in the 2014 survey had the highest likelihood to have started drinking (hazard ratio [HR]: 1.25 CI: 1.15 to 1.36), compared to the participants of the same age in the 2007 survey while those in the 2011 (HR: 0.89, CI: 0.85, 0.93) and 2017 (HR: 0.63, CI: 0.58, 0.68) surveys had less likelihood. Participants born in 1993 to 2002 (later cohort) had higher probability to have started drinking than those born in 1983 to 1992 (HR: 1.80, CI: 1.69, 1.92). CONCLUSION: Thai youths of the recent generations living in recent years tend to have a higher probability of initiating drinking than those in the past. Interventions to prevent underage drinking should begin earlier for the young generation.

Flexible employment relationships and careers in times of the COVID-19 pandemic.

The COVID-19 pandemic represents a crisis that affects several aspects of people's lives around the globe. Most of the affected countries took several measures, like lockdowns, business shutdowns, hygiene regulations, social distancing, school and university closings, or mobility tracking as a means of slowing down the distribution of COVID-19. These measures are expected to show short-term and long-term effects on people's working lives. However, most media reports focused on the effects of the COVID-19 pandemic on changes in work arrangements (e.g., short-time work, flexible location and hours) for workers in a regular employment relationship. We here focus on workers in flexible employment relationships (e.g. temporary agency work and other forms of subcontracted labor, as well as new forms of working, such as in the gig economy). Specifically, we will discuss (a) how the work and careers of individuals in flexible employment relationships might get affected by the COVID-19 pandemic; (b) outline ideas how to examine period effects of the COVID-19 pandemic on the work and careers of those individuals, and (c) outline how the pandemic can contribute to the ramification of flexible employment relationships.

Age, period, and cohort effects on asthma prevalence in Canadian adults, 1994-2011.

PURPOSE: To examine the age, period, and cohort effects on asthma prevalence among Canadian adults from 1994/1995 to 2010/2011. METHODS: Using data from the National Population Health Survey, 13,616 Canadian adults were followed for 16 years. Age was limited to 18-80 years during follow-up. Modified Poisson regression models with generalized estimating equations were used to estimate age, period, and cohort effects on asthma and active asthma prevalence after accounting for sociodemographic factors. Model-based standardization was performed to estimate standardized rates. RESULTS: Overall asthma prevalence increased from 5% in 1994/1995 to 11% in 2010/2011; decreasing from 12% for 20-year-olds to 6% for 50-60-year-olds and then increased to 8% for 80-year-olds. Individuals aged 20 years had the steepest increase in prevalence between 1994/1995 and 2010/2011. Active asthma prevalence increased from 5% in 1994/1995 to 8% in 2010/2011; decreasing from 8% for 20-year-olds to 5% for 50-60-year-olds and then increased to 6% for 80-year-olds. CONCLUSIONS: Our findings suggest the presence of age, period, and cohort effects on prevalence of asthma overall and presence of age and period effects on active asthma prevalence in Canadian adults.

Ovarian Cancer Incidence in the Multi-Ethnic Asian City-State of Singapore 1968-2012.

PURPOSE: We investigate ovarian cancer incidence between 1968 and 2012 in Singapore, a multiethnic Asian city state. METHODS: Aggregated data of ovarian epithelial cancer numbers and estimated person-years from 1968 to 2012 were obtained from Singapore Cancer Registry. Age-Period-Cohort modelling was performed. RESULTS: The age-standardised incidence rate of ovarian cancer increased from 5.8 to 12.5 per 100,000 per year between 1968 and 2012, while the age-standardised mortality rate has remained stable. This increase was higher among Malays (5.1 to 14.0 per 100,000 per year), compared to Chinese and Indians.  Serous carcinoma showed the greatest increase in incidence from 0.4 to 3.4 per 100,000 per year.  Period effects were seen in the ovarian cancer incidence trend in Chinese women, but not Malay and Indian women. Clear cell and mucinous carcinoma subtypes were more common in Chinese than in Malay and Indian women. Stage at diagnosis for the years 2003-2010 differed by subtype, and the majority of patients with serous carcinomas presented at a later stage compared to those with clear cell or mucinous carcinomas. CONCLUSION: Ovarian cancer incidence rates have doubled in 40 years in Singapore. There were ethnic differences in incidence rates and ovarian cancer subtypes.

Age-Period-Cohort Analysis on the Time Trend of Hepatitis B Incidence in Four Prefectures of Southern Xinjiang, China from 2005 to 2017.

Objective: The influence of age, period, and cohort on Hepatitis B (HB) incidence in four prefectures of southern Xinjiang, China is still not clear. This paper aims to analyze the long-term trend of the HB incidence in four prefectures of southern Xinjiang, China and to estimate the independent impact of age, period and cohort, as well as to predict the development trend of HB incidence in male and female groups, then to identify the targeted population for HB screening by the model fitting and prediction. Method: The data were from the Case List of HB Cases Reported in the Infectious Disease Reporting Information Management System and the Xinjiang Statistical Yearbook of China. The age-period-cohort (APC) model was used to estimate the impacts of age, period and cohort on HB incidence, which could be used to predict the HB incidence in specific age groups of men and women. Results: Under the influence of age effect, the incidence of HB in males had two peaks (20-35 years old and 60-80 years old), the influence of age effect on the incidence of HB in females was lower than that of males and the obvious peak was between 20-30 years old; the period effect on the HB incidence in males and females fluctuated greatly and the fluctuation degree of influence on males was bigger than that of women. The HB incidence among males and females in the four regions tended to be affected by cohort effect, which reached a peak after 1990 and then declined sharply and gradually became stabilized. By predicting the HB incidence from 2018 to 2022, we found that there were significant differences in HB incidence among people over 35 years old, under 35 years old and the whole population in four prefectures of southern Xinjiang, China. Conclusions: Although the incidence of HB in some regions shows a downward trend, there is still an obvious upward trend of incidences in other places. In our paper, results indicate that the burden of HB incidence may be extended in the future, so we hope this can draw the attention of relative departments. These results reveal the differences of incidence between males and females as well, so respective measures of the two groups' functions are essential.

Mortality trends of bladder cancer in China from 1991 to 2015: an age-period-cohort analysis.

PURPOSE: The effects of age, period, and cohort on mortality rates of bladder cancer in China remained vague. This study aimed to analyze the secular trends of bladder cancer mortality in China and estimate the independent effects of age, period, and cohort. METHODS: Data for bladder cancer mortality from 1991 to 2015 was obtained from the WHO Mortality Database and China Health Statistical Yearbook. The age-period-cohort model was used to estimate the effect of age, period, and cohort. The intrinsic estimator method was used to solve the nonidentification problem of collinearity among age, period, and cohort. RESULTS: The age-standardized mortality rates of total residents (2.33-1.87/100,000), male (3.45-2.89/100,000), and female (1.24-0.82/100,000) showed decreasing trends, which was more obvious in males than in females. Age effects increased consistently with age in all age groups (coefficients: -2.02 to 1.91 in the total population, -2.06 to 2.02 in males and -2.04 to 1.81 in females). Cohort effects decreased overall (coefficients: 0.96 to -1.62 in the total population, 1.11 to -1.66 in males and 0.78 to -1.46 in females). Period effects were not found in China. CONCLUSION: Although a decreasing mortality was observed, the bladder cancer burden in China will likely increase in the next few years due to population aging, environmental pollution, and food safety. The findings suggested that preventive measures should be taken corresponding to the changes in age-and cohort-related factors in the population.

Homicídios masculinos em duas regiões brasileiras: análise do efeito da idade, período e coorte / Male homicides in two regions of Brazil: analysis of the effect of age, period, and cohort / Homicidios masculinos en dos regiones brasileñas: análisis del efecto de la edad, período y cohorte

O objetivo foi avaliar o efeito da idade, período e coorte de nascimento na evolução temporal da mortalidade por homicídios em homens nos estados das regiões Nordeste e Sudeste do Brasil, entre o período de 1980 a 2014. Estudo ecológico de tendência temporal. Os modelos APC foram estimados usando funções estimáveis na inferência dos parâmetros. Os dados de mortalidade e os dados populacionais foram obtidos junto ao Departamento de Informática do SUS. As taxas de mortalidade por homicídio, segundo estados, foram padronizadas pelo método direto, tendo, como população padrão, a mundial, proposta pela Organização Mundial da Saúde. A Região Nordeste apresentou 317.711 óbitos por homicídios, e o Sudeste, 544.640 óbitos, correspondendo, respectivamente, a uma taxa média padronizada por 100.000 homens de 58,68 óbitos e 64,68 óbitos. As maiores taxas de mortalidade médias padronizadas foram observadas nos estados de Alagoas (157,74 óbitos) e Pernambuco (109,58 óbitos). Em todos os estados, observou-se aumento da mortalidade até a terceira década de vida, com redução progressiva para as demais faixas etárias. Verificou-se tendência ascendente para todos os estados da Região Nordeste, Minas Gerais e Espírito Santo; nos demais estados, houve descendência das taxas. Em todos os estados, observou-se aumento do risco de óbito nas gerações mais jovens, com exceção do Estado de São Paulo que mostrou perfil inverso. Os achados do presente estudo podem correlacionar-se com o processo de descontinuidade de coorte, no qual integrantes de coortes largas encontram menor oportunidade de acesso a emprego, renda e educação, aumentando o risco de envolvimento com a criminalidade e morte por homicídios.

The objective was to assess the effect of age, period, and birth cohort on the time trend in mortality from homicides in men in the states of the Northeast and Southeast regions of Brazil from 1980 to 2014. This was an ecological time trend study. PCA models were estimated using estimable functions in inference of the parameters. Mortality and population data were obtained from the Brazilian Health Informatics Department. State-by-state mortality rates from homicide were standardized by the direct method, with the world population as the standard, as proposed by the World Health Organization. The Northeast region recorded 317,711 deaths from homicides and the Southeast 544,640 deaths, corresponding, respectively, corresponding to mean standardized rates of 58.68 and 64.68 deaths per 100,000 men. The highest mean standardized mortality rates were observed in the states of Alagoas (157.74 deaths) and Pernambuco (109.58 deaths). All the states showed an increase in mortality up to the third decade of life, with a progressive reduction in the other age brackets. There was an upward trend in all the states of the Northeast and in Minas Gerais and Espírito Santo in the Southeast, while in the other states there was a downward trend. All the states showed an increase in the risk of death in the younger age brackets, except for the state of São Paulo, which showed the inverse profile. The current study's findings may correlate with the process of discontinuity in the cohort, in which members of wide cohorts found less opportunity for access to employment, income, and education, thus increasing the risk of involvement in crime and death from homicide.

El objetivo fue evaluar el efecto de la edad, período y cohorte de nacimiento, en la evolución temporal de la mortalidad por homicidios en hombres, en los estados de las regiones Nordeste y Sudeste, Brasil, entre el período de 1980 a 2014. Se realizó un estudio ecológico de tendencia temporal. Los modelos APC se estimaron usando funciones estimables en la inferencia de los parámetros. Los datos de mortalidad y los datos poblacionales se obtuvieron mediante el Departamento de Informática del Sistema Único de Salud. Las tasas de mortalidad por homicidio, según los diferentes estados, se estandarizaron mediante método directo, considerando como población patrón la mundial, propuesta por la Organización Mundial de la Salud. La Región Nordeste presentó 317.711 óbitos por homicidios y el Sudeste 544.640 óbitos, correspondiendo a una tasa media estandarizada por 100.000 hombres de 58,68 óbitos y 64,68 óbitos, respectivamente. Las mayores tasas de mortalidad medias estandarizadas se observaron en los estados de Alagoas (157,74 óbitos) y Pernambuco (109,58 óbitos). En todos los estados se observó un aumento de la mortalidad hasta la tercera década de vida, con una reducción progresiva para las demás franjas etarias. Se verificó una tendencia ascendente para todos los estados de la Región Nordeste, Minas Gerais y Espírito Santo, en los demás estados hubo un descenso de las tasas. En todos los estados, se observó un aumento del riesgo de óbito en las generaciones más jóvenes, con excepción del Estado de São Paulo, que mostró un perfil inverso. Los hallazgos del presente estudio pueden correlacionarse con el proceso de discontinuidad de cohorte, en donde integrantes de cohortes más grandes encuentran una menor oportunidad de acceso al empleo, renta y educación, así como un aumento el riesgo de implicación en la criminalidad y muerte por homicidios.

Efeito da idade, período e coorte de nascimento na incapacidade de idosos residentes na comunidade: Coorte de Idosos de Bambuí (1997-2012) / Effect of age, period, and birth cohort on incapacity in community-dwelling elderly: the Bambuí Elderly Cohort (1997-2012) / Efecto de la edad, período y cohorte de nacimiento en la incapacidad de ancianos residentes en una comunidad: Cohorte Ancianos de Bambuí (1997-2012)

Resumo: A evolução temporal das prevalências de incapacidade em idosos pode ocorrer devido ao efeito de idade, período ou coorte. A idade é relacionada a fatores biológicos, o período ao contexto ambiental do sujeito e a coorte às exposições que o mesmo sofre desde o seu nascimento até o momento atual. O objetivo do estudo foi verificar quais dimensões temporais mais influenciam a evolução da prevalência de incapacidade entre idosos, em 15 anos. Foram utilizados dados da Coorte de Idosos de Bambuí, e a incapacidade foi avaliada por relato de "muita dificuldade" ou "não consegue" realizar pelo menos uma entre as atividades relacionadas à mobilidade, atividades básicas e instrumentais de vida diária. A análise foi feita pelo modelo idade-período-coorte para dados agregados, com cálculo dos efeitos das dimensões temporais por análise do deviance. O modelo de regressão de Poisson determinou as associações entre idade, período e coorte e a prevalência de incapacidade, considerando-se a população total e a estratificação por sexo e nível de escolaridade. O efeito de período foi o mais importante para as três dimensões da incapacidade, com aumento da prevalência no início do período, seguida de redução ao longo do tempo, com pequenas diferenças em relação ao sexo e a escolaridade. O efeito de coorte foi significativo, embora menos importante que o de período. Assim, destaca-se o importante olhar para o ambiente do idoso na busca da redução da prevalência de incapacidade, com ênfase nas políticas e programas que podem impactar de forma positiva na evolução temporal desse desfecho, dado o consistente efeito de período observado neste estudo.

Abstract: Time trends in the prevalence rates of incapacity in the elderly can occur due to the effects of age, period, or cohort. Age is related to biological factors, the period to the subject's environmental context, and the cohort to the subject's exposures from birth to the present. The study aimed to verify which time dimensions most influence the evolution in the prevalence of incapacity in the elderly over the course of 15 years. Data were used from the Bambuí Elderly Cohort, and incapacity was assessed by report of "great difficulty" or "inability" to perform at least one of the activities related to mobility and basic and instrumental activities of daily living. The analysis was done with the age-period-cohort model for aggregate data, with calculation of the effects of time dimensions by analysis of deviance. A Poisson regression model determined the associations between age, period, and cohort and prevalence of incapacity, considering the total population and stratification by sex and schooling. Period effect was the most important for the three dimensions of incapacity, with an increase in prevalence at the start of the period, followed by a reduction over time, with minor differences in relation to sex and schooling. Cohort effect was significant, although less important than period effect. The results highlight the importance of analyzing the elder's environment for reducing prevalence of incapacity, with an emphasis on policies and programs that can positively impact the time trend in this outcome, given the consistent effect of period observed in this study.

Resumen: La evolución temporal de las prevalencias de incapacidad en ancianos puede estar ocasionada debido al efecto de la edad, período o cohorte. La edad está relacionada con factores biológicos, el período con el contexto ambiental del sujeto y la cohorte con las exposiciones que el mismo sufre desde su nacimiento hasta el momento actual. El objetivo del estudio fue verificar cuáles son las dimensiones temporales que más influencian la evolución de la prevalencia de la incapacidad entre ancianos durante 15 años. Se utilizaron datos de la Cohorte de Ancianos de Bambuí y se evaluó la incapacidad por el informe de "mucha dificultad" o "no consigue" realizar por lo menos una, entre todas las actividades relacionadas con la movilidad, además de las actividades básicas e instrumentales de la vida diaria. El análisis se realizó mediante el modelo edad-período-cohorte para datos agregados, con cálculo de los efectos de las dimensiones temporales por análisis de desviación. El modelo de regresión de Poisson determinó las asociaciones entre edad, período y cohorte y la prevalencia de incapacidad, considerando la población total y la estratificación por sexo y nivel de escolaridad. El efecto de período fue el más importante para las tres dimensiones de la incapacidad, con un aumento de la prevalencia en el comienzo del período, seguida de una reducción a lo largo del tiempo, con pequeñas diferencias en relación con el sexo y la escolaridad. El efecto de cohorte fue significativo, aunque menos importante que el de período. De esta forma, se destaca la importante visión del anciano respecto al ambiente, con el fin de reducir la prevalencia de incapacidad, resaltando las políticas y programas que pueden impactar de forma positiva en la evolución temporal de este desenlace, dado el consistente efecto del período observado en este estudio.