Impact of GnRH ovarian stimulation protocols on intracytoplasmic sperm injection outcomes

Table 2 Significant predictors of the number of retrieved oocytes and high quality embryos by linear regression.

	Univariable analysis			Multivariable analysis
Parameters	R²	Unstandardized coefficients	Pvalue	Unstandardized coefficients	Standardized coefficients	Pvalue
Number of retrieved oocytes
Protocol (a)	0.072	3.030	< .001	2.667	0.237	< .001
Female age (b)	0.067	- 1.556	< .001	- 0.854	- 0.142	.010
Basal FSH (mIU/ml)	0.079	- 0.656	< .001	- 0.343	- 0.147	.009
Total ovarian volume (cm³)	0.026	0.141	.007
Total number of antral follicles	0.141	0.554	< .001	0.459	0.311	< .001
Number of high quality embryos (c)
Protocol (a)	0.074	0.379	< .001	0.345	0.247	< .001
Female age (b)	0.071	- 0.199	< .001	- 0.136	- 0.182	.002
Basal FSH (mIU/ml)	0.068	- 0.076	< .001	- 0.048	- 0.165	.005
Total ovarian volume (cm³)	0.015	0.013	.045
Total number of antral follicles	0.041	0.037	.001	0.024	0.132	.022

(a) Agonist protocol as reference. (b) For a 5 year increase. (c) Data was log transformed: ln (number of high quality embryos + 1).
Negative coefficients for inversely related variables. Number of retrieved oocytes: model accounts for 25% variability of the number of retrieved oocytes. Number of high quality embryos: model accounts for 17% variability of the number of high quality embryos.

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