. Author manuscript; available in PMC: 2015 Mar 1.

Published in final edited form as: Cancer Causes Control. 2013 Dec 17;25(3):309–319. doi: 10.1007/s10552-013-0332-8

Table 1.

Cases and controls in the AMBER Consortium, by subtype and study, 2013

	Case-control studies		Cohort studies		Total with questionnaire data available
	CBCS	WCHS	BWHS	MEC	Total with questionnaire data available
Breast cancer cases	1,535	1,088	2,063	1,053	5,739
ER+	841	555	848	623	2,867
ER−	587	225	444	224	1,480
ER unknown	107	308	771	206	1,392
ER−, PR−, HER2−	336	130	153	—	619
Age at diagnosis <40	227	125	178	0	530
Age at diagnosis ≥40	1,308	963	1,885	1,053	5,209
Controls	788	975	8,298	4,212	14,273