Table 1.

Study population. Values are numbers (percentages)

	Full sample (n=9 532 836)	Women who had BRCA testing (n=32 945)
Age category, years
18-25	1 427 952 (15)	850 (3)
26-35	1 503 136 (16)	3674 (11)
36-45	2 036 895 (21)	9506 (29)
46-55	2 546 635 (27)	11 751 (36)
56-64	2 018 218 (21)	7164 (22)
US Census region
Northeast	2 157 935 (23)	7497 (23)
North Central	1 949 966 (20)	6370 (19)
South	3 118 836 (33)	10 464 (32)
West	2 100 345 (22)	7800 (24)
Unknown	205 754 (2)	814 (2)
Insurance plan type
Preferred provider organisation	5 555 048 (58)	22 049 (67)
Health maintenance organisation	1 179 703 (12)	4151 (13)
Consumer directed health plan	440 786 (5)	1870 (6)
Other	2 033 167 (21)	3496 (11)