Table 2.

Comparison of basic data between the blood transfusion group and nontransfusion group $\left(\overline{x}\pm s\right)$.

Group	N	Age (years)	BMI (kg/m2)	Gestational week (week)	Number of cesarean sections	Number of pregnancies
Blood transfusion group	154	31.95 ± 3.11	27.66 ± 2.44	36.79 ± 2.44	3.12 ± 0.56	4.51 ± 0.64
Nontransfusion group	446	31.77 ± 3.53	27.59 ± 2.32	38.81 ± 2.44	2.19 ± 0.34	3.16 ± 0.44
t		0.561	0.318	8.857	24.402	28.953
P		0.574	0.750	≤0.001	≤0.001	≤0.001