Table 4. Regression analysis of the association between immature oocytes rate and ICSI outcomes (n=3,920).
	MI/oocyte			GV/oocyte
	R2	β	p	R2	β	p
Laboratorial outcomes*
Fertilization rate	0.035	-0.096	<0.001	0.029	-0.059	<0.001
High-quality embryos rate at day two	0.014	-0.102	<0.001	0.008	-0.066	<0.001
High-quality embryos rate at day three	0.020	-0.090	<0.001	0.020	-0.087	<0.001
Blastocyst rate	0.073	-0.066	<0.001	0.071	-0.053	<0.001
Clinical outcomes**
Implantation rate	0.059	-0.074	<0.001	0.056	-0.042	0.033
	B	OR	P	B	OR	P
Pregnancy rate	-0.011	0.989	0.002	-0.009	0.992	0.013
Miscarriage rate	0.010	1.011	0.220	0.006	0.944	0.418
R2: effect;β: standardized regression coefficient; B: binary regression coefficient, OR: odds ratio for regression coefficient. * Data was adjusted for maternal age, maternal BMI, total FSH dose, estradiol level at hCG day and number of retrieved oocytes. ** Data was adjusted for maternal age, maternal BMI, total FSH dose, estradiol level at hCG day, number of retrieved oocytes, number of transferred embryos and endometrial thickness.