Table 3.

Conditional logistic regression of the association of embryo abandonment with different variables from 1999 to 2009

Variable	Crude OR	95% CI	p value	Adjusted OR	95% CI	p value
Number of mature oocytes (≥ 6 vs < 6)	6.40	[4.96–8.22]	< 0.001	0.91	[0.57–1.46]	NS
Embryos produced (≥ 6 vs < 6)	8.46	[6.53–10.95]	< 0.001	1.68	[1.03–2.73]	< 0.035
No. of embryos transferred (≥ 2 vs < 2)	1.32	[1.05–1.12]	0.019	0.54	[0.25–1.18]	NS
Score of embryos transfer (> 8 vs ≤ 8)	1.90	[1.51–2.40]	< 0.001	1.95	[0.91–4.21]	NS
Blastocyst transfer vs cleavage transfer	7.29	[5.31–10.02]	< 0.001	2.46	[1.64–3.69]	< 0.001
No. of frozen embryos (≥ 2 vs < 2)	5.51	[4.48–5.93]	< 0.001	3.68	[3.10–4.38]	< 0.001
Pregnancy (yes vs no)	5.33	[4.12–6.88]	< 0.001	4.38	[3.17–6.04]	< 0.001
Female age (≤ 34 vs > 34)	2.67	[2.05–3.48]	< 0.001	1.37	[0.97–1.93]	NS

NS not significant