Table 2.

Logistic regression analysis of factors related to live birth.

projects	Unadjusted			Adjusted
	OR	95% CI	P value	OR	95% CI	P value
Age (years)	0.867	0.858 ~0.877	<0.001	0.901	0.887~0.916	<0.001
Primary infertility	1.858	1.655~2.086	<0.001	0.896	0.773~1.039	0.093
Infertility years	0.934	0.918~0.950	<0.001	0.982	0.962~1.003	0.375
BMI (Kg/M2)	0.957	0.938~0.975	<0.001	0.963	0.951~0.982	<0.001
Basal P (μg/L)	1.036	0.992~1.081	0.110	1.024	0.978~1.072	0.321
AMH (ng/mL)	1.212	1.183~1.241	<0.001	1.013	0.976~1.052	0.487
PRL (ng/L)	1.002	1.000~1.004	0.032	1.001	0.998~1.003	0.624
AFC(n)	1.096	1.087~1.105	<0.001	1.026	1.009~1.042	0.002
No. Of treatment cycles	0.823	0.775~0.875	<0.001	0.965	0.875~1.064	0.470
Initiation dosage of Gn used	0.994	0.993~0.995	<0.001	1.001	0.999~1.002	0.907
Duration of Gn used	1.153	1.132~1.175	<0.001	1.014	0.988~1.042	0.299
Oocyte number	1.120	1.105~1.136	<0.001	1.007	0.988~1.025	0.486
Controlled ovarian hyperstimulation protocol
Early-follicular phase GnRH-a long protocol	Reference			Reference
Mid-luteal phase GnRH-a long protocol	0.389	0.333~0.453	<0.001	0.468	0.387~0.566	<0.001
GnRH antagonist protocol and others	0.083	0.067~0.105	<0.001	0.175	0.133~0.230	<0.001

BMI, body mass index; P, progesterone; AMH, anti-Müllerian hormone; AFC, antral follicle counting; PRL, prolactin; Gn, Gonadotropin.