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Socio-economic inequalities in the incidence of four common cancers: a population-based registry study.

Abstract：

OBJECTIVES:To investigate the relationship between socio-economic circumstances and cancer incidence in Scotland in recent years. STUDY DESIGN:Population-based study using cancer registry data. METHODS:Data on incident cases of colorectal, lung, female breast, and prostate cancer diagnosed between 2001 and 2012 were obtained from a population-based cancer registry covering a population of approximately 2.5 million people in the West of Scotland. Socio-economic circumstances were assessed based on postcode of residence at diagnosis, using the Scottish Index of Multiple Deprivation (SIMD). For each cancer, crude and age-standardised incidence rates were calculated by quintile of SIMD score, and the number of excess cases associated with socio-economic deprivation was estimated. RESULTS:93,866 cases met inclusion criteria, comprising 21,114 colorectal, 31,761 lung, 23,757 female breast, and 15,314 prostate cancers. Between 2001 and 2006, there was no consistent association between socio-economic circumstances and colorectal cancer incidence, but 2006-2012 saw an emerging deprivation gradient in both sexes. The incidence rate ratio (IRR) for colorectal cancer between most deprived and least deprived increased from 1.03 (95% confidence interval [CI] 0.91-1.16) to 1.24 (95% CI 1.11-1.39) during the study period. The incidence of lung cancer showed the strongest relationship with socio-economic circumstances, with inequalities widening across the study period among women from IRR 2.66 (95% CI 2.33-3.05) to 2.91 (95% CI 2.54-3.33) in 2001-03 and 2010-12, respectively. Breast and prostate cancer showed an inverse relationship with socio-economic circumstances, with lower incidence among people living in more deprived areas. CONCLUSION:Significant socio-economic inequalities remain in cancer incidence in the West of Scotland, and in some cases are increasing. In particular, this study has identified an emerging, previously unreported, socio-economic gradient in colorectal cancer incidence among women as well as men. Actions to prevent, mitigate, and undo health inequalities should be a public health priority.

journal_name

Public Health

journal_title

Public health

authors

Tweed EJ,Allardice GM,McLoone P,Morrison DS

doi

10.1016/j.puhe.2017.10.005

subject

Has Abstract

pub_date

2018-01-01 00:00:00

pages

1-10

eissn

0033-3506

issn

1476-5616

pii

S0033-3506(17)30333-5

journal_volume

154

pub_type

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Socio-economic inequalities in the incidence of four common cancers: a population-based registry study.