Table 4.

Baseline characteristics of patients with and without CSD.

Item	Without CSD group (n=1570)	CSD group (n=509)	P value
Ages (years)	35.04±4.71	35.84±4.99	0.339
BMI (kg/m2)	22.85±2.86	23.56 ±2.87	0.240
Endometrial thickness(mm)	9.59 ±1.73	9.49 ±1.79	0.522
Blastocyst-stage embryo transfer rate, %(n/N)	36.18% (568/1570)	31.63% (161/509)	0.062
Fresh embryo transfer rate, %(n/N)	27.13% (426/1570)	34.77% (177/509)	0.001*

CSD, cesarean section defect; BMI, body mass index; Values are described as mean±standard deviation or percentage (number/total number); ^*P<0.05.