Supplementary Methods, Tables 1 - 2, Figures 1 - 2 from Racial Comparison of Receptor-Defined Breast Cancer in Southern African Women: Subtype Prevalence and Age–Incidence Analysis of Nationwide Cancer Registry Data

The supplementary material includes more detailed descriptions of the methodology, in particular details of the receptor-extraction algorithm and additional statistical methods. Supplementary results include Supplementary Table S1.1: Namibian and NHLS laboratories (SA) where ER, PR and HER2 immunohistochemistry is performed. Supplementary Table S2.1: Characteristics of 12361 histologically-confirmed breast cancer patients; Supplementary Table S2.2: Characteristics of women with missing ER status; Supplementary Table S2.3: Breast cancer subtype distribution by race; Supplementary Figure S1.1: Annual number of public sector breast cancers in women in SA in 2009-10 as a percentage of annual number of total cases in 2006; Supplementary Figure S2.1: Age-specific percentages of ER�, PR� and HER2� breast cancer by race; Supplementary Figure S2.2: Laboratory-specific receptor-prevalences by race and Supplementary Figure S2.3: Laboratory-specific ORs for ER, PR and HER2 associated with race.