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.