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. 2021 Feb 17;2021(1):hoab003. doi: 10.1093/hropen/hoab003

Table I.

Characteristics of the populations.

Patients Endometriosis group (n = 67) Non-endometriosis group (n = 31) P-value
Age (years), mean (SD) 33.1 (6.5) 36.5 (10.4) 0.05
BMI (kg⋅m−2), mean (SD) 24.5 (5.2) 25.6 (6.0) 0.40
Parity, n (%) 0.329
 0 45 (67) 16 (52)
 1 11 (16.5) 8 (26)
 ≥2 11 (16.5) 7 (22)
Vaginal delivery binary 0.022
 Yes 15 (22) 14 (45)
 No 52 (78) 17 (55)
Smoking, N (%) 3 (9.7%) 14 (20.9%) 0.17

Student’s t-test and ANOVA for normally distributed data, Mann–Whitney U test for non-parametric data, and Chi-square test for categorical data.