Table 1.

Baseline characteristics of patients by group. Reported as mean ± standard deviation or median (range). No significant group differences in baseline characteristics were observed

Characteristic	Group		P
	H‐Mis (n = 250)	S‐Mis (n = 283)
Age (years)	27.6 ± 7.1	26.7 ± 8.6	0.657
Menstrual cycle length (days)	29.4 ± 1.6	30.9 ± 2.1	0.521
β‐human chorionic gonadotropin (mIu/ml)	13 134.2 ± 1068.6	12 339.3 ± 1081.1	0.322
Duration of amenorrhea (days)	45.2 ± 5.1	44.6 ± 4.9	0.577
Gravidity	0.5 ± 0.7	0.5 ± 0.6	0.122
Parity	0 (0–1)	0 (0–1)	—