TABLE 9.

Comparison of the success rates across temporal groups.

Predictor	OR (95% CI)	Crude p-value a	Adjusted OR (95% CI) b	Adjusted p-values	p-value c
Pregnancy rate
Group C vs. A	2.03 (1.07; 3.84)	.031	2.03 (.80; 5.16)	.135	.033
Group C vs. B	1.30 (.96; 1.98)	.370	1.63 (.75; 3.87)	.256	.381
Group B vs. A	1.56 (1.00; 2.43)	.049	1.24 (.66; 2.33)	.497	.050
Comparison across A, B, C	—	—	—	—	.054 d

^a p-values of regression (comparison of the groups).

^b Adjusted for vitrification time (groups), uterine pathologies, age, AMH, MII, endometriosis, and male cause.

^c Two-tailed Fisher exact test.

^d Chi-squared test, two degrees of freedom.

Group A: Vitrification time 17:00–18:00 hpi, B: Vitrification time 18:01–19:00 hpi, C: Vitrification time 19:01–21:00 hpi.