Table 4.

Multivariate binary logistic regression analysis of factors affecting live birth.

Influencing factor	P value	OR (95% CI)
Age (years)	0.000	0.957 (0.948–0.967)
AFC	0.009	1.012 (1.003–1.021)
BMI (kg/m2)	0.000	0.978 (0.968–0.989)
P/O ratio	0.000
P/O ratio <0.15		Reference
0.15 nmol/L ≤ P/O ratio <0.22	0.514	0.966 (0.869–1.073)
0.22 ≤ P/O ratio <0.32	0.006	0.862 (0.774–0.959)
P/O ratio ≥ 0.32	0.000	0.717 (0.637–0.806)
LH on hCG injection day (IU/L)	0.000	1.087 (1.067–1.107)
Endometrial thickness on hCG day (cm)	0.000	1.127 (1.098–1.157)
Available embryo number	0.000	1.064 (1.048–1.080)