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Title

Socioeconomic and demographic disparities in breast cancer stage at presentation and survival: A Swiss population-based study

Authors
Feller, Anita
Schmidlin, Kurt
Bordoni, Andrea
Bulliard, Jean-Luc
Camey, Bertrand
Konzelmann, Isabelle
Maspoli, Manuela
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Published in International Journal of Cancer. 2017, vol. 141, no. 8, p. 1529-1539
Abstract We explored socioeconomic and demographic disparities in breast cancer (BC) stage at presentation and survival in a Swiss population-based sample of female BC patients linked to the census-based Swiss National Cohort. Tumor stage was classified according to Surveillance, Epidemiology and End Results Program summary stage (in situ/localized/regional/distant). We used highest education level attained to estimate SEP (low/middle/high). Further demographic characteristics of interest were age at presentation (30-49/50-69/70-84 years), living in a canton with organized screening (yes/no), urbanity of residence (urban/peri-urban/rural), civil status (single/married/widowed/divorced) and nationality (Swiss/non-Swiss). We used ordered logistic regression models to analyze factors associated with BC stage at presentation and competing risk regression models for factors associated with survival. Odds of later-stage BC were significantly increased for low SEP women (odds ratio 1.19, 95%CI 1.06-1.34) compared to women of high SEP. Further, women living in a canton without organized screening program, women diagnosed outside the targeted screening age and single/widowed/divorced women were more often diagnosed at later stages. Women of low SEP experienced an increased risk of dying from BC (sub-hazard ratio 1.22, 95%CI 1.05-1.43) compared to women of high SEP. Notably, these survival inequalities could not be explained by socioeconomic differences in stage at presentation and/or other sociodemographic factors. It is concerning that these social gradients have been observed in a country with universal health insurance coverage, high health expenditures and one of the highest life expectancies in the world.
Identifiers
PMID: 28657175
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Research group Groupe Bouchardy Magnin Christine (Registre genevois des tumeurs) (532)
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FELLER, Anita et al. Socioeconomic and demographic disparities in breast cancer stage at presentation and survival: A Swiss population-based study. In: International Journal of Cancer, 2017, vol. 141, n° 8, p. 1529-1539. https://archive-ouverte.unige.ch/unige:97436

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Deposited on : 2017-10-06

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