. Author manuscript; available in PMC: 2010 Aug 10.

Published in final edited form as: Int J Epidemiol. 2009 Apr 22;38(6):1543–1551. doi: 10.1093/ije/dyp193

Table 3.

Summary of income–breast cancer survival associations moderated by stage at diagnosis and place: disaggregation of heterogeneous between-country comparisons in low-income areas

	Stage at diagnosis		US places
	Node positive	Unstaged	Hawaii	Other
Adult samples: ≥25 years
Study outcomes	1	9	2	7
Total participants	193	30 014	3321	26 693
RR (95% CI)	1.22 (1.02,1.46)	1.13 (1.12,1.14)	1.07 (1.05,1.09)	1.16 (1.15,1.17)
Younger adult samples: <65 years
Study outcomes	2	4	1	3
Total participants	183	2525	1470	1055
RR (95% CI)	1.40 (1.30,1.50)	1.18 (1.15,1.22)	1.12 (1.01,1.20)	1.24 (1.20,1.29)

Notes. Each paired comparison within age categories—node positive vs unstaged or Canada–USA comparisons that used Hawaiian vs other US samples—was significantly different (z), P < 0.05. Each paired comparison between age categories (e.g. node positive breast cancer among women ≥25 years of age vs node positive breast cancer among women <65 years of age) was significantly different (z), P < 0.05.