Table 1.
Demographics of study population
| Parameter | Patients with uterine fibroids (n=3,031) | Controls (n=50,710) | P-value |
|---|---|---|---|
| Average age (years) | 43.4 | 35.3 | <0.0001 |
| Age groups (years), n (%) | <0.0001 | ||
| 18–29 | 127 (4.9) | 14,447 (34.0) | |
| 30–34 | 243 (10.0) | 7,998 (15.9) | |
| 35–39 | 391 (13.9) | 6,677 (12.9) | |
| 40–44 | 590 (21.0) | 6,753 (12.9) | |
| 45–49 | 745 (25.4) | 6,967 (12.4) | |
| 50–54 | 935 (24.9) | 7,868 (11.8) | |
| Average age at diagnosis (years) | 36.4 | – | |
| Experiencing symptoms before diagnosis, n (%) | 1,977 (73.1) | – | |
| Diagnostic method, n (%) | |||
| Surgical | 2,537 (84.1) | – | |
| Physician-suspecteda | 199 (7.2) | – | |
| Otherb | 295 (8.7) | – | |
| Ethnicity, n (%) | <0.0001 | ||
| White | 2,169 (62.6) | 38,413 (67.0) | |
| Black/African American | 460 (23.2) | 4,108 (13.1) | |
| Other | 402 (14.2) | 8,189 (19.9) | |
| Geographic regions, n (%) | 0.0183 | ||
| East | 779 (24.5) | 11,546 (21.6) | |
| Midwest | 680 (20.1) | 12,440 (21.7) | |
| South | 906 (31.8) | 15,353 (32.4) | |
| West | 609 (21.9) | 10,744 (23.2) | |
| Unknown | 57 (1.7) | 627 (1.1) | |
| Type of insurance, n (%)c | <0.0001 | ||
| Public | 180 (12.0) | 979 (13.9) | |
| Private | 922 (66.6) | 3,977 (54.8) | |
| Other | 145 (8.8) | 1,008 (13.5) | |
| None | 189 (12.6) | 1,287 (17.8) | |
| Education level, n (%) | <0.0001 | ||
| High school or less | 365 (18.6) | 9,511 (28.6) | |
| Some college/college | 2,023 (66.9) | 32,792 (61.6) | |
| Graduate education | 643 (14.5) | 8,407 (9.9) | |
Notes:
a
Physician-suspected responses reported included: ultrasound/sonogram or other imaging test (eg, magnetic resonance imaging) results; physical or pelvic examination results; patient’s description of the heavy or irregular bleeding; patient’s family history; blood test indicating the patient was anemic; patient had a hysterectomy; or patient was infertile.
b
Response of “other” or “not sure” or the respondent declined to answer.
c
Total number of respondents providing an answer for question on type of insurance was 1,436 women in the uterine fibroid group and 7,251 women in the control group.