Table 4.

Modified Poisson regression for live birth

Groups	Variables	RR (95%CI)	P value
Control	ET
	Age	0.864(0.761–0.980)	0.023
	FET
	Age	0.714(0.522–0.975)	0.034
	Infertility duration (year)	1.181(1.007–1.384)	0.041
PCOS	ET
	NO
	FET
	NO