Inequalities In Cancer Mortality Research Articles

Abstract 4826: Cancer mortality attributable to area-level socioeconomic inequalities in Japan from 2015 to 2020

Abstract Background: In the 3rd Healthy Japan 21 and the 4th National Cancer Plan, the government focused on reducing health inequalities. However, current monitoring of socioeconomic inequalities in cancer is still insufficient to set the targets for the plan. To prioritize strategy aimed at reducing socioeconomic inequalities in cancer mortality, we estimated the population attributable risk fraction (PAF) and excess death due to socioeconomic inequalities, by sex, age group and cancer site. Method: We used the areal deprivation index (ADI) to establish area-based socioeconomic status. We categorized municipalities to ADI quintile weighted by the size of population, Q1 is the least deprived and Q5 the most deprived group. Excess death due to socioeconomic inequalities was calculated by the difference between observed number of deaths and expected death of Q2 to Q5 group with Q1 as standard population. We used cancer mortality data obtained from vital statistics in 2015-2020. Results: In total, about 12000 male and 2800 female excess deaths per year due to socioeconomic inequalities were estimated; that is 5.5% and 1.8% as PAF. PAF due to socioeconomic inequalities limited to premature death, less than 75 years old, was estimated as 7.6% in men and 3.3% in women. By age group, the 0-39 years group showed the largest PAF at 15.7% in men and 16.6% in women. In men of all age groups, except 0-39 years, lung cancer was the highest excess death due to socioeconomic inequalities. For women, some cancer sites (breast, ovary, esophagus) showed an opposite association, Q1 was the highest mortality group. Therefore, total excess death was lower than in men. In women of all ages, the highest rate of excess death due to socioeconomic inequalities was gallbladder cancer. For the 0-39 years group, a high rate of excess death in stomach, leukemia, and cervical cancer was observed. Discussion: Excess death and PAF due to socioeconomic inequalities differed by sex and age group. A greater impact of socioeconomic inequality on cancer mortality was observed in men than in women. Among women, further attention should be paid to areal variation of cancer death related to socioeconomic inequalities, based on the different area-based indices. Citation Format: Yuri Ito, Tomoki Nakaya, Manami Inoue, Tomotaka Sobue, Hitoshi Nakagama. Cancer mortality attributable to area-level socioeconomic inequalities in Japan from 2015 to 2020 [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2024; Part 1 (Regular Abstracts); 2024 Apr 5-10; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2024;84(6_Suppl):Abstract nr 4826.

Migração e mortalidade por câncer entre os migrantes colombianos nos EUA: um estudo com dados de declaração de óbito

Abstract We aim to compare cancer mortality rates of USA Colombian migrants (USA Colombians) to Colombians in their country of origin (CO Colombians). Using Colombian national mortality data and data on cancer deaths among Colombians residing in the states of California, Florida, and New York (USA Colombians) for the period 2008-2012, we estimated sex-specific and age-standardized mortality rates (ASMR), expressed per 100,000 persons. For comparisons between the two populations before and after adjustment for educational level, negative binomial regression models were used to compute Mortality Rate Ratios (MRR). CO Colombians had higher cancer mortality rates compared with USA Colombians (male MRR 1.4 [95%CI: 1.2-1.5], female MRR 1.5 [95%CI: 1.3-1.7]). These differences persisted for most cancers even after adjustment for education. CO Colombians had significantly higher mortality from gastric (MRR 2.6 in males and 2.8 in females) and cervical cancer (MRR 5.0) compared with US Colombians. Educational inequalities in cancer mortality were more pronounced among CO Colombians than among USA Colombians. Lower cancer mortality observed among USA Colombians cannot be attributed to differences in education, an indicator of socio-economic status. Rather, it is likely due to better access to preventive and curative healthcare in the USA.

Widening area-based socioeconomic inequalities in cancer mortality in Germany between 2003 and 2019

Cancer mortality has declined in recent decades, but—due to a lack of national individual-level data—it remains unclear whether this applies equally to all socioeconomic groups in Germany. Using an area-based approach, this study investigated socioeconomic inequalities in cancer mortality and their secular trends on a German nationwide scale for the first time. Official cause-of-death data from 2003 to 2019 were linked to the district-level German Index of Socioeconomic Deprivation. Age-standardised mortality rates for all cancers combined and the most common site-specific cancers were calculated according to the level of regional socioeconomic deprivation. To quantify the extent of area-based socioeconomic inequalities in cancer mortality, absolute (SII) and relative (RII) indices of inequality were estimated using multilevel Poisson models. On average, cancer mortality was 50% (women) and 80% (men) higher in Germany’s most deprived than least deprived districts (absolute difference: 84 deaths per 100,000 in women and 185 deaths per 100,000 in men). As declines in cancer mortality were larger in less deprived districts, the socioeconomic gap in cancer mortality widened over time. This trend was observed for various common cancers. Exceptions were cancers of the lung in women and of the pancreas in both sexes, for which mortality rates increased over time, especially in highly deprived districts. Our study provides first evidence on increasing socioeconomic inequalities in cancer mortality on a nationwide scale for Germany. Area-based linkage allows to examine socioeconomic inequalities in cancer mortality across Germany and identify regions with high needs for cancer prevention and control.

Age-period-cohort analysis of lung cancer mortality inequalities in Southern Spain: missed opportunities for implementing equitable tobacco control policies

BackgroundLung cancer mortality in European countries shows different epidemiological patterns according to sex and socioeconomic variables. Some countries show decreasing rates in both sexes, while others show a delayed profile, with increasing mortality in women, inconsistently influenced by socioeconomic status. Our aim was to evaluate the effect of age, period and birth cohort on lung cancer mortality inequalities in men and women in Andalusia, the southernmost region in Spain.MethodsWe used the Longitudinal Database of the Andalusian Population, which collects demographic and mortality data from the 2001 census cohort of more than 7.35 million Andalusians, followed up between 2002 and 2016. Mortality rates were calculated for men and women by educational level, and small-area deprivation. Poisson models were used to assess trends in socioeconomic inequalities in men and women. Finally, age-period-cohort (APC) models were used separately for each educational level and gender.ResultsThere were 39,408 lung cancer deaths in men and 5,511 in women, yielding crude mortality rates of 78.1 and 11.4 × 105 person-years, respectively. In men higher mortality was found in less educated groups and inequalities increased during the study period: i.e. the rate ratio for primary studies compared to university studies increased from 1.30 (CI95:1.18–1.44) to 1.57 (CI95:1.43–1.73). For women, educational inequalities in favour of the less educated tended to decrease moderately. In APC analysis, a decreasing period effect in men and an increasing one in women were observed. Cohort effect differed significantly by educational level. In men, the lower the educational level, the earlier the peak effect was reached, with a 25-year difference between the least-educated and college-educated. Conversely, college-educated women reached the peak effect with a 12-year earlier cohort than the least-educated women. The decline of mortality followed the same pattern both in men and women, with the best-educated groups experiencing declining rates with earlier birth cohorts.ConclusionsOur study reveals that APC analysis by education helps to uncover changes in trends occurring in different socioeconomic and gender groups, which, combined with data on smoking prevalence, provide important clues for action. Despite its limitations, this approach to the study of lung cancer inequalities allows for the assessment of gaps in historical and current tobacco policies and the identification of population groups that need to be prioritised for public health interventions.

Socioeconomic inequalities in cancer mortality between and within countries in Europe: a population-based study.

Reducing socioeconomic inequalities in cancer is a priority for the public health agenda. A systematic assessment and benchmarking of socioeconomic inequalities in cancer across many countries and over time in Europe is not yet available. Census-linked, whole-of-population cancer-specific mortality data by socioeconomic position, as measured by education level, and sex were collected, harmonized, analysed, and compared across 18 countries during 1990-2015, in adults aged 40-79. We computed absolute and relative educational inequalities; temporal trends using estimated-annual-percentage-changes; the share of cancer mortality linked to educational inequalities. Everywhere in Europe, lower-educated individuals have higher mortality rates for nearly all cancer-types relative to their more highly-educated counterparts, particularly for tobacco/infection-related cancers [relative risk of lung cancer mortality for lower- versus higher-educated=2.4 (95% confidence intervals: 2.1-2.8) among men;=1.8 (95% confidence intervals: 1.5-2.1) among women]. However, the magnitude of inequalities varies greatly by country and over time, predominantly due to differences in cancer mortality among lower-educated groups, as for many cancer-types higher-educated have more similar (and lower) rates, irrespective of the country. Inequalities were generally greater in Baltic/Central/East-Europe and smaller in South-Europe, although among women large and rising inequalities were found in North-Europe (relative risk of all cancer mortality for lower- versus higher-educated ≥1.4 in Denmark, Norway, Sweden, Finland and the England/Wales). Among men, rate differences (per 100,000 person-years) in total-cancer mortality for lower-vs-higher-educated groups ranged from 110 (Sweden) to 559 (Czech Republic); among women from approximately null (Slovenia, Italy, Spain) to 176 (Denmark). Lung cancer was the largest contributor to inequalities in total-cancer mortality (between-country range: men, 29-61%; women, 10-56%). 32% of cancer deaths in men and 16% in women (but up to 46% and 24%, respectively in Baltic/Central/East-Europe) were associated with educational inequalities. Cancer mortality in Europe is largely driven by levels and trends of cancer mortality rates in lower-education groups. Even Nordic-countries, with a long-established tradition of equitable welfare and social justice policies, witness increases in cancer inequalities among women. These results call for a systematic measurement, monitoring and action upon the remarkable socioeconomic inequalities in cancer existing in Europe. This study was done as part of the LIFEPATH project, which has received financial support from the European Commission (Horizon 2020 grant number 633666), and the DEMETRIQ project, which received support from the European Commission (grant numbers FP7-CP-FP and 278511). SV and WN were supported by the French Institut National du Cancer (INCa) (Grant number 2018-116). PM was supported by the Academy of Finland (#308247, # 345219) and the European Research Council under the European Union's Horizon 2020 research and innovation programme (grant agreement No 101019329). The work by Mall Leinsalu was supported by the Estonian Research Council (grant PRG722).

Widening Social Inequalities in Cancer Mortality of Children Under 5 Years in Korea.

To investigate the effect of parental social class on cancer mortality in children under 5 in Korea, two birth cohorts were constructed by linking national birth data to under-5 death data from the Statistics Korea for 1995-1999 (3,323,613 births) and 2010-2014 (2,297,876 births). The Cox proportional hazards model adjusted for covariates was used in this study. Social inequalities of under-5 cancer mortality risk in paternal education and paternal employment status were greater in 2010-2014 than in 1995-1999. The gap of hazard ratio (HR) of under-5 cancer mortality between lower (high school or below) and higher (university or higher) paternal education increased from 1.23 (95% confidence interval, 1.041.46) in 1995-1999 to 1.45 (1.11-1.97) in 2010-2014; the gap of HR between parents engaged in manual work and non-manual work increased from 1.32 (1.12-1.56) in 1995-1999 to 1.45 (1.12-1.89) in 2010-2014 for fathers, and from 1.18 (0.7-1.98) to 1.69 (1.03-2.79) for mothers. When the parental social class was lower, the risk of under-5 cancer mortality was higher in not only adverse but normal births. Social inequalities must be addressed to reduce the disparity in cancer mortality of children under 5 years old.

Cancer mortality 1981–2016 and contribution of specific cancers to current socioeconomic inequalities in all cancer mortality: A population-based study

BackgroundIn many high-income countries cancer mortality rates have declined, however, socioeconomic inequalities in cancer mortality have widened over time with those in the most deprived areas bearing the greatest burden. Less is known about the contribution of specific cancers to inequalities in total cancer mortality. MethodsUsing high-quality routinely collected population and mortality records we examine long-term trends in cancer mortality rates in Scotland by age group, sex, and area deprivation. We use the decomposed slope and relative indices of inequality to identify the specific cancers that contribute most to absolute and relative inequalities, respectively, in total cancer mortality. ResultsCancer mortality rates fell by 24 % for males and 10 % for females over the last 35 years; declining across all age groups except females aged 75+ where rates rose by 14 %. Lung cancer remains the most common cause of cancer death. Mortality rates of lung cancer have more than halved for males since 1981, while rates among females have almost doubled over the same period. ConclusionCurrent relative inequalities in total cancer mortality are dominated by inequalities in lung cancer mortality, but with contributions from other cancer sites including liver, and head and neck (males); and breast (females), stomach and cervical (younger females). An understanding of which cancer sites contribute most to inequalities in total cancer mortality is crucial for improving cancer health and care, and for reducing preventable cancer deaths.

Socioeconomic inequalities in cancer mortality: Is Costa Rica an exception to the rule?

Socioeconomic inequalities in cancer mortality have been described for a range of cancers sites worldwide, using diverse measures of socioeconomic position (SEP). These studies have shown a negative social gradient where lower SEP was associated with greater odds of having cancer, particularly in men. However, there is a lack of information regarding low and middle-income countries. The objective of our study was to analyze the relationship between the socioeconomic characteristics of patients' residential districts and mortality due to cancer in Costa Rica between 2011 and 2017. An ecological study at the level of the district of residence was conducted using the multilevel mixed-effects Poisson regression. All cancer-caused deaths between January 1, 2011 and December 31, 2017 were included (n = 32,117). Eleven cancer sites were analyzed independently. The 477 Costa Rican districts were divided by area (urban/mixed/rural) and wealth using census data. All-cancer combined a significant association between cancer mortality and wealth was found. Cancer mortality was lower in the poorest as compared to the richest districts (IRRQ4 = 0.79 [0.73-0.86]). The majority of cancer sites followed a similar pattern, showing a positive social gradient. These results contradict the international literature mostly conducted in high-income countries. These findings confirmed the importance of conducting studies in middle-income countries, since the socioeconomic and cultural contexts are different from those in high-income countries, which influence the social distribution of lifestyles and risk behaviors.

Health Literacy Influences Men's Active and Passive Cancer Information Seeking

Background:For cancer prevention information to be effective, it must be accessible to its target populations. Prevalence of inadequate health literacy (HL) is high, but there is a dearth of information on the impact of HL on men's cancer information seeking.Objective:We investigated (1) men's cancer information seeking behaviors, (2) the effect of HL on men's cancer information seeking behavior, and (3) men's preferences for cancer information, considering their HL level. From a national perspective, we investigated men's information seeking behavior from the Irish Cancer Society (ICS), the largest provider of cancer information in Ireland.Methods:Men from adult literacy classes and men's groups were invited to complete a questionnaire. General and ICS-specific cancer information seeking behavior was investigated. Univariate and multivariate logistic regression models were conducted with “ever” seeking cancer information from any source, and actively seeking and passively acquiring ICS information as dependent variables.Key Results: Overall, 259 men completed the questionnaire and 44% had inadequate HL. About one-half of responders reported “ever” actively looking for cancer information. In the study group, 19% actively sought and 67% passively acquired ICS-specific information. In multivariate analysis, the odds of actively seeking (2.93; 95% CI [1.05, 8.15]) or passively acquiring (4.7; 95% CI [1.99, 11.05]) ICS-specific cancer information was significantly higher among those with adequate versus inadequate HL, respectively. HL was not significantly associated with odds of “ever” cancer information seeking in multivariate analysis (odds ratio 1.81; 95% CI [0.90, 3.63]). Men want information about cancer prevention. Suggested future cancer information sources differed by HL levels. General practitioners and the Internet were the preferred source for men with inadequate (53.3%) and adequate HL (57%), respectively.Conclusions:Men both passively acquire and actively seek cancer prevention information. Multimodal dissemination of cancer prevention information is necessary to reach a wide cross-section of men, including those with inadequate HL. This could potentially lower men's cancer burden and reduce gender inequalities in cancer mortality. [HLRP: Health Literacy Research and Practice. 2019;3(3):e147–e160.]Plain Language Summary: Most men get cancer prevention information by coming across it passively in their daily lives, instead of actively looking for this information. Men with low health literacy are less likely to obtain cancer information both passively and actively. Men want this information. Organizations need to make this information available in many places and formats (e.g., Internet, doctor, television, sports clubs).

Inequalities in cancer mortality in Scotland 1981-2016: a population-based register study

Inequalities in cancer mortality in Scotland 1981-2016: a population-based register study

Inequalities in cancer mortality in Scotland 1981-2016: a population-based register study

Inequalities in cancer mortality in Scotland 1981-2016: a population-based register study

What\u2019s the difference? A gender perspective on understanding educational inequalities in all-cause and cause-specific mortality

BackgroundMaterial and behavioural factors play an important role in explaining educational inequalities in mortality, but gender differences in these contributions have received little attention thus far. We examined the contribution of a range of possible mediators to relative educational inequalities in mortality for men and women separately.MethodsBaseline data (1991) of men and women aged 25 to 74 years participating in the prospective Dutch GLOBE study were linked to almost 23 years of mortality follow-up from Dutch registry data (6099 men and 6935 women). Cox proportional hazard models were used to calculate hazard ratios with 95% confidence intervals, and to investigate the contribution of material (financial difficulties, housing tenure, health insurance), employment-related (type of employment, occupational class of the breadwinner), behavioural (alcohol consumption, smoking, leisure and sports physical activity, body mass index) and family-related factors (marital status, living arrangement, number of children) to educational inequalities in all-cause and cause-specific mortality, i.e. mortality from cancer, cardiovascular disease, other diseases and external causes.ResultsEducational gradients in mortality were found for both men and women. All factors together explained 62% of educational inequalities in mortality for lowest educated men, and 71% for lowest educated women. Yet, type of employment contributed substantially more to the explanation of educational inequalities in all-cause mortality for men (29%) than for women (− 7%), whereas the breadwinner’s occupational class contributed more for women (41%) than for men (7%). Material factors and employment-related factors contributed more to inequalities in mortality from cardiovascular disease for men than for women, but they explained more of the inequalities in cancer mortality for women than for men.ConclusionsGender differences in the contribution of employment-related factors to the explanation of educational inequalities in all-cause mortality were found, but not of material, behavioural or family-related factors. A full understanding of educational inequalities in mortality benefits from a gender perspective, particularly when considering employment-related factors.

Parental and/or Personal Socioeconomic Circumstances: How to Explain Site-Specific Cancer Mortality Inequalities Among Young Belgian Adults

Both socioeconomic position (SEP) in childhood and adulthood are associated with adult mortality. Yet, the relative importance of childhood socioeconomic (SE) conditions is likely to vary depending on the cause of death. This paper will study: 1) whether SE conditions during both childhood and adulthood are associated with overall and site-specific cancer mortality among Belgian young adults; 2) the relative importance of all indicators of parental and personal SEP in explaining differences in cancer mortality. Data were derived from record linkage between the Belgian censuses of 1991 and 2001 and mortality follow-up data for 2001-2011. Parental educational attainment, parental occupational status, parental housing status, and childhood area deprivation were used as measures of parental SEP, and current education as indicator of personal SEP. SE differences were studied for overall and site-specific cancer mortality by calculating age-standardized mortality rates and mortality rate ratios using Poisson regression. Both low parental and personal SEP are associated with higher all-cancer mortality in young adulthood. Personal education seemed to be the strongest indicator of overall and site-specific cancer mortality in young adulthood, independent of parental SEP. Yet, for women, this was partly due to a health selection effect. In the full models, parental SEP was no longer associated with cancer mortality but deprived living conditions still were. Site-specific inequalities were generally more expressed among women than among men. Studies and policies focussing on SE inequalities in mortality in young adulthood should allow for both childhood and adulthood SE conditions.

Site-specific cancer mortality inequalities by employment and occupational groups: a cohort study among Belgian adults, 2001–2011

ObjectiveThis study probes into site-specific cancer mortality inequalities by employment and occupational group among Belgians, adjusted for other indicators of socioeconomic (SE) position.DesignThis cohort study is based on record linkage...

Regional cancer mortality inequalities in Bulgaria related to socio-economic indicators (2000–2012)

Regional cancer mortality inequalities in Bulgaria related to socio-economic indicators (2000–2012)

Educational inequality in cancer mortality: a record linkage study of over 35 million Italians.

Large studies are needed to evaluate socioeconomic inequality for site-specific cancer mortality. We conducted a longitudinal census-based national study to quantify the relative inequality in cancer mortality among educational levels in Italy. We linked the 2011 Italian census with the 2012 and 2013 death registries. Educational inequality in overall cancer and site-specific cancer mortality were evaluated by computing the mortality rate ratio (MRR). A total of 35,708,445 subjects aged 30-74years and 147,981cancer deaths were registered. Compared to the lowest level of education (none or primary school), the MRR for all cancers in the highest level (university) was 0.57 (95% CI 0.55; 0.58) in men and 0.84 (95% CI 0.81; 0.87) in women. Higher education was associated with reduced risk of mortality from lip, oral cavity, pharynx, oesophagus, stomach, colon and liver in both sexes. Higher education (university) was associated with decreased risk of lung cancer in men (MRR: 0.43, 95% CI 0.41; 0.46), but not in women (MRR: 1.00, 95% CI 0.92; 1.10). Highly educated women had a reduced risk of mortality from cervical cancer than lower educated women (MRR: 0.39, 95% CI 0.27; 0.56), but they had a similar risk for breast cancer (MRR: 1.01, 95% CI 0.94; 1.09). Education is inversely associated with total cancer mortality, and the association was stronger in men. Different patterns and trends in tobacco smoking in men and women account for at least most of the gender differences.

Socioeconomic and Racial/Ethnic Disparities in Cancer Mortality, Incidence, and Survival in the United States, 1950-2014: Over Six Decades of Changing Patterns and Widening Inequalities.

We analyzed socioeconomic and racial/ethnic disparities in US mortality, incidence, and survival rates from all-cancers combined and major cancers from 1950 to 2014. Census-based deprivation indices were linked to national mortality and cancer data for area-based socioeconomic patterns in mortality, incidence, and survival. The National Longitudinal Mortality Study was used to analyze individual-level socioeconomic and racial/ethnic patterns in mortality. Rates, risk-ratios, least squares, log-linear, and Cox regression were used to examine trends and differentials. Socioeconomic patterns in all-cancer, lung, and colorectal cancer mortality changed dramatically over time. Individuals in more deprived areas or lower education and income groups had higher mortality and incidence rates than their more affluent counterparts, with excess risk being particularly marked for lung, colorectal, cervical, stomach, and liver cancer. Education and income inequalities in mortality from all-cancers, lung, prostate, and cervical cancer increased during 1979–2011. Socioeconomic inequalities in cancer mortality widened as mortality in lower socioeconomic groups/areas declined more slowly. Mortality was higher among Blacks and lower among Asian/Pacific Islanders and Hispanics than Whites. Cancer patient survival was significantly lower in more deprived neighborhoods and among most ethnic-minority groups. Cancer mortality and incidence disparities may reflect inequalities in smoking, obesity, physical inactivity, diet, alcohol use, screening, and treatment.

Time trends in educational inequalities in cancer mortality in Colombia, 1998–2012

ObjectivesTo evaluate trends in premature cancer mortality in Colombia by educational level in three periods: 1998–2002 with low healthcare insurance coverage, 2003–2007 with rapidly increasing coverage and finally 2008–2012 with...

Trends in inequalities in premature cancer mortality by educational level in Colombia, 1998–2007

BackgroundThere is a paucity of studies on socioeconomic inequalities in cancer mortality in developing countries. We examined trends in inequalities in cancer mortality by educational attainment in Colombia during a...

Time trends in socioeconomic inequalities in cancer mortality: results from a 35 year prospective study in British men.

BackgroundSocioeconomic inequalities in cancer mortality in Britain have been shown to be present in the 1990s and early 2000s. Little is known about on-going patterns in such inequalities in cancer mortality. We examined time trends in socioeconomic inequalities in cancer mortality in Britain between 1978 and 2013.MethodsA socially representative cohort of 7489 British men with data on longest-held occupational social class, followed up for 35 years, in whom 1484 cancer deaths occurred.ResultsThe hazard ratio for cancer mortality for manual vs. non-manual social classes remained unchanged; among men aged 50–59 years it was 1.62 (95%CI 1.17–2.24) between 1980–1990 and 1.65 (95%CI 1.14–2.40) between 1990–2000. The absolute difference (non-manual minus manual) in probability of surviving death from cancer to 70 years remained at 3% over the follow-up. The consistency of risks over time was similar for both smoking-related and non-smoking related cancer mortality.ConclusionSocioeconomic inequalities in cancer mortality in Britain remain unchanged over the last 35 years and need to be urgently addressed.