表 3. Multivariate analysis of factors affecting pregnancy outcome of blastocyst transfer.

影响囊胚移植妊娠结局的多因素分析

Factor	Partial regression coefficient	Standard error	Wald	Odds ratio	P	95% confidence interval
Age (≤35 yr.)
>35 yr.	1.079	0.501	4.630	2.942	0.031	2.492-4.095
Years of infertility (≤5 years)
>5 years	0.583	0.435	1.799	3.793	0.017	2.846-3.965
Endometrial thickness on transplantation day (≥9 mm)
<9 mm	1.102	0.468	5.544	3.012	0.018	2.684-4.348
High-quality blastocyst rate (≥65%)
<65%	0.669	0.360	3.453	1.254	0.063	0.499-1.739
Inner cell cluster rating (Grade A+Grade B)
Grade C	0.606	0.457	1.756	1.034	0.185	0.593-1.485
Trophoblast cell rating (Grade A+Grade B)
Grade C	0.577	0.204	7.996	3.782	0.004	3.283-4.174
Blastocyst transfer day (D6)
D5	0.699	0.307	5.165	3.012	0.023	2.783-3.573
Fertility (no)
Yes	0.689	0.340	4.096	2.993	0.042	2.593-3.717