Table 7.

Conditional logistic regression of the association of embryo abandonment or possible abandonment with different variables from 1999 to 2014

Variable	Crude OR	95% CI	p value	Adjusted OR	95% CI	p value
Number of mature oocytes (≥ 7 vs < 7)	8.01	[6.30–10.19]	< 0.001	1.31	[0.88–1.95]	NS
Embryos produced (≥ 6 vs < 6)	9.99	[7.85–12.74]	< 0.001	1.57	[1.04–2.37]	0.031
No. of embryos transferred (≥ 2 vs < 2)	3.04	[2.26–4.08]	< 0.001	0.64	[0.39–1.07]	NS
Score of embryos transfer (> 8 vs ≤ 8)	4.91	[3.87–6.22]	< 0.001	2.43	[1.64–3.61]	< 0.001
Blastocyst transfer vs cleavage transfer	2.29	[2.04–2.57]	< 0.001	1.26	[1.10–1.45]	0.001
No. of frozen embryos (> 2 vs ≤ 2)	15.40	[12.32–19.23]	< 0.001	7.58	[5.79–9.92]	< 0.001
Pregnancy (yes vs no)	5.31	[4.33–6.50]	< 0.001	3.37	[2.63–4.33]	< 0.001
Female age (≤ 35 vs > 35)	3.37	[2.67–4.25]	< 0.001	1.50	[1.14–1.97]	0.004

NS not significant.