Table 1.
Baseline demographic summary of women with endometriosis and control (n = 430).
| Characteristics | Discovery study | Replication study | ||||
|---|---|---|---|---|---|---|
| Case n = 126 (%) | Control n = 96 (%) | P value | Case n = 133 (%) | Control n = 75 (%) | P value | |
| Age, yearsa | 35.49 (6.42) | 37.78 (6.96) | 0.0118 | 36.76 (7.15) | 41.39 (6.57) | < 0.0001 |
| BMIa, kg/m2 | 21.06 (2.79) | 23.13 (4.50) | < 0.0001 | 21.8 (3.5) | 23.97 (4.77) | 0.0008 |
| Age of menarchea | 12.66 (1.32) | 12.58 (1.28) | 0.8739 | 13.01 (1.32) | 12.63 (1.8) | 0.048 |
| Duration of menstrual cyclea | 28.06 (2.41) | 28.43 (4.52) | 0.5325 | 28.62 (3.29) | 27.14 (4.25) | 0.0227 |
| Dysmenorrhea, n (%)b | 103 (81.75) | 57 (59.38) | 0.0002 | 99 (74.44) | 58 (77.33) | 0.6409 |
Mean (SD) for continuous variables.
n (%) for discontinuous variables.
BMI body mass index, SD standard deviation.
aMann–Whitney test.
bχ2 test.