Table 1.
Clinical characteristics of women with endometriosis
| Endometriosis (n=709) | Controls (n=807) | P value | |
| Age at diagnosis (years, median/range) | 33 (18–59) | 32 (17–59) | 0.631 |
| BMI (kg/m2, median/range) | 21.1 (15.2–33.5) | 20.9 (15.8–33.6) | 0.223 |
| Parity (n, %) p=0 p≥1 |
351 (49.5%) 358 (50.5%) |
327 (40.5%) 481 (59.5%) |
0.0004 |
| Gravida (n, %) G=0 G≥1 |
305 (43.1%) 404 (56.9%) |
209 (26%) 597 (74%) |
<0.0001 |
| Menstrual cycle length ≤24 days (n, %) 25–32 days (n, %) ≥33 days (n, %) |
58 (8.2%) 593 (83.6%) 58 (8.2%) |
18 (2.5%) 680 (84.3%) 109 (13.5%) |
0.258 |
| Age at menarche (years, median/range) | 14 (9–17) | 14 (10–17) | 0.892 |
| Use of oral contraceptives (n, %) | 10 (1.4%) | 22 (2.7%) | 0.105 |
BMI, body mass index.