Table 1.
Baseline Demographics of Women who were included and excluded, Study of Women’s Health Across the Nation (SWAN) Menstrual Calendar Substudy
| Included n=1320 |
Excluded n=178 |
P value | |
|---|---|---|---|
| n (%) | n (%) | ||
| Study Site | |||
| Southeastern Michigan | 430 (32.6) | 113 (63.5) | |
| Northern California | 432 (32.7) | 27 (15.2) | <0.001 |
| Los Angeles | 458 (34.7) | 38 (21.3) | |
| Race/ethnicity | |||
| African-American | 236 (17.9) | 89 (50.0) | |
| Chinese | 232 (17.6) | 18 (10.1) | <0.001 |
| Japanese | 262 (19.8) | 19 (10.7) | |
| White | 590 (44.7) | 52 (29.2) | |
| Educationa | |||
| Less than High School | 66 (5.0) | 14 (8.6) | |
| High School Grad | 219 (16.6) | 35 (21.6) | |
| Some College/Vocation | 455 (34.5) | 60 (37.1) | 0.01 |
| College Graduate | 296 (22.4) | 35 (21.6) | |
| Post College | 284 (21.5) | 18 (11.1) | |
| Marital Statusb | |||
| Single | 172 (13.0) | 22 (12.6) | |
| Married | 911 (69.1) | 103 (58.9) | |
| Separated | 44 (3.3) | 10 (5.7) | 0.02 |
| Widowed | 24 (1.8) | 6 (3.4) | |
| Divorced | 168 (12.7) | 34 (19.4) | |
| How Hard Is It To Pay For Basicsc | |||
| Very Hard | 91 (6.9) | 15 (8.8) | |
| Somewhat Hard | 349 (26.4) | 63 (36.8) | 0.01 |
| Not Hard | 880 (66.7) | 93 (54.4) | |
| Body Mass Index, kg/m2 d | |||
| Normal (≤24.9) | 759 (58.4) | 67 (38.3) | |
| Overweight (25.0–29.9) | 251 (19.3) | 54 (30.9) | <0.001 |
| Obese(≥ 30.0) | 290 (22.3) | 54 (30.9) | |
| Baseline Smoking Statuse | |||
| Never | 836 (64.1) | 104 (59.8) | |
| Past | 277 (21.2) | 31 (17.8) | 0.03 |
| Current | 191 (14.7) | 39 (22.4) | |
| Ever Taken Hormones Prior to Study f | 154 (11.7) | 17 (9.7) | 0.43 |
| Ever Diabetes During Study g | 211 (16.0) | 33 (18.5) | 0.39 |
| Ever Fibroids During Study g | 417 (31.6) | 47 (26.4) | 0.17 |
| Age at Screener years, Mean (STD) | 45.7 (2.7) | 46.3 (3.0) | 0.02 |
Study was conducted in 3 SWAN sites: Los Angeles, Northern California, Southeastern Michigan
a
16 excluded have missing information
b
1 included and 3 excluded have missing information
c
7 excluded have missing information
d
20 included and 3 excluded had missing information
e
16 included and 4 excluded had missing information
f
Does not include oral contraceptive pills.
g
Diagnosed during the first 10 annual visits.