Table 2.

Breast Implant Surgery and Baseline Characteristics at Time of Recruitment Among WHI OS^a Participants Without Breast Cancer at Baseline

	Number	Percent
Body mass index
< 18.5	33	3.1
18.5-24.9	776	2.2
25-29.9	327	1.1
30-34.9	74	0.5
35-39.9	19	0.4
≥ 40	12	0.4
Waist
> 88 cm	162	0.5
≤ 88 cm	1090	1.9
Ethnicity
Native American	6	1.5
Asian	42	1.7
Black	36	0.5
Hispanic	59	1.7
White	1090	1.5
Other	20	2.0
Age at Screening for WHI
50-59	646	2.3
60-69	495	1.3
70-79	116	0.6
Total	1257	1.4
Region
Northeast	120	0.6
South	443	2.0
Midwest	163	0.9
West	531	2.1
Education
≤High School	200	1.1
<College	533	1.7
College	152	1.5
>College	365	1.4
Income
≤10K	37	1.0
10K to <20K	92	1.0
20K to <35K	210	1.1
35K to <50K	225	1.4
50K to <75K	243	1.5
75K to <100K	141	1.8
100K to <150K	142	2.5
≥150K	86	2.7
Hormone Use
Never used	242	0.7
Past user	164	1.3
Current user	843	2.1
Smoking Status
Never smoked	560	1.3
Past smoker	564	1.5
Current smoker	115	2.1

^aWomen's Health Initiative Observational Study