TABLE 6.

Uni- and multivariate analysis with vitrification time as continuous variable.

Predictor	Crude OR (95% CI)	Crude p-values	Adjusted OR (95% CI) a	Adjusted p-values
Pregnancy rate
Vitrification time b	1.36 (1.01; 1.83)	.045	1.38 (.90; 2.13)	.142
Uterine pathologies	.39 (.23; .67)	.001	.55 (.25; 1.20)	.132
Age	.93 (.89; .98)	.004	.95 (.89; 1.02)	.144
AMH	1.02 (1.01; 1.03)	.006	1.01 (.99; 1.03)	.287
MII oocytes	1.05 (1.01; 1.10)	.015	1.01 (.96; 1.07)	.626
Previous successful fresh transfer c	4.51 (1.00; 20.45)	.051	—	—
Endometriosis	.55 (.31; .98)	.042	.92 (.40; 2.10)	.839
AFC	1.03 (1.00; 1.07)	.051	—	—
Nicotine	.47 (.22; 1.01)	.054	—	—
Male cause	1.53 (1.00; 2.33)	.049	1.12 (.59; 2.13)	.734

^a Adjusted for vitrification time (continuous variable), uterine pathologies, age, AMH, MII, endometriosis, and male cause.

^b Continuous variable.

MII, metaphase II oocytes.

^c Resulted in a pregnancy.

These are raw p values. Crude p < 0.05 is considered significant. The adjusted p value is after correction for factors that can influence the result. Adjusted p < 0.05 is considered significant.