Table 1.
Participant characteristics [n (%)] by uterine fibroids status of non-Hispanic whites, 35–59 years of age, in the Sister Study, 2003–2007 (n = 19,972).a
| Characteristic | Cases | Noncases |
|---|---|---|
| Total | 1,526 | 18,446 |
| Age (years) | ||
| 35–44 | 241 (15.8) | 3,712 (20.1) |
| 45–59 | 1,285 (84.2) | 14,734 (79.9) |
| Highest level of educationb | ||
| High school or lessc | 201 (13.2) | 2,159 (11.7) |
| Some college/vocational school | 519 (34.0) | 5,809 (31.5) |
| Bachelor’s degree | 403 (26.4) | 5,706 (30.9) |
| Graduate degree | 403 (26.4) | 4,771 (25.9) |
| Smoking statusb | ||
| Current | 195 (12.8) | 2,105 (11.4) |
| Former | 496 (32.5) | 6,125 (33.2) |
| Never | 835 (54.7) | 10,213 (55.4) |
| Alcohol intake (drinks per week)b | ||
| 0 | 242 (15.9) | 2,529 (13.7) |
| 0.01–0.49 | 446 (29.3) | 5,189 (28.2) |
| 0.50–2.00 | 341 (22.4) | 4,257 (23.1) |
| 2.01–6.99 | 305 (20.0) | 3,821 (20.7) |
| ≥ 7.00 | 190 (12.5) | 2,637 (14.3) |
| Body mass indexb | ||
| < 25 | 614 (40.4) | 8,217 (44.8) |
| 25–29.9 | 479 (31.5) | 5,421 (29.5) |
| ≥ 30 | 428 (28.1) | 4,720 (25.7) |
| Parityb,d | ||
| 0 | 381 (25.0) | 4,883 (26.5) |
| 1 | 297 (19.5) | 3,049 (16.5) |
| 2 | 553 (36.3) | 6,751 (36.6) |
| ≥ 3 | 293 (19.2) | 3,754 (20.4) |
| Menopausal statusb | ||
| Premenopausal | 449 (29.4) | 8,733 (47.4) |
| Natural | 346 (22.7) | 5,793 (31.4) |
| Surgicale | 731 (47.9) | 3,914 (21.2) |
a
Cases were self-reported diagnosis of fibroids at ≤ 35 years of age, excluding 89 women missing fibroid status or age at diagnosis or who reported childhood or adolescent ages at diagnosis (< 15 years).
b
Number does not sum to total because of missing data.
c
Less than high school: fibroids (n = 13), no fibroids (n = 79).
d
Total number of live and still births by 35 years of age.
e
Includes women with hysterectomy or endometrial ablation in which actual timing of hormonal transition is unknown.