TABLE 7.

Univariate logistic regression analysis of factors associated the position (θ) of the meiotic spindle relative to the polar body.

Variable	Spindle position a	β	SEβ	Wald	OR	95% CI	p‐value
Female (oocyte provider) age b	0° < θ ≤ 30°	0.0005	0.007	0.065	1.000	0.986–1.010	0.948
	30° < θ ≤ 60°	0.014	0.009	1.645	1.010	0.997–1.030	0.100
	60° < θ ≤ 90°	0.031	0.012	2.511	1.030	1.010–1.06	0.012
	90° < θ ≤ 180°	0.042	0.018	2.377	1.040	1.010–1.080	0.017
	PB/oolemma d	0.013	0.008	0.486	1.010	0.960–1.070	0.627
	Nonvisible	0.046	0.008	5.714	1.050	1.030–1.060	<0.0001
PPOS c	0° < θ ≤ 30°	−0.257	0.086	−2.998	0.774	0.654–0.915	0.003
	30° < θ ≤ 60°	−0.144	0.103	−1.395	0.866	0.707–1.060	0.163
	60° < θ ≤ 90°	−0.414	0.147	−2.811	0.661	0.495–0.882	0.005
	90° < θ ≤ 180°	0.038	0.218	0.176	1.040	0.678–1.590	0.861
	PB/oolemma d	−1.173	0.352	−3.335	0.309	0.155–0.617	<0.0001
	Nonvisible	−0.432	0.093	−4.652	0.649	0.541–0.779	<0.0001
Long c	0° < θ ≤ 30°	−0.152	0.148	−1.030	0.859	0.643–1.150	0.303
	30° < θ ≤ 60°	−0.075	0.178	−0.422	0.928	0.655–1.310	0.673
	60° < θ ≤ 90°	−0.130	0.242	−0.537	0.878	0.546–1.410	0.591
	90° < θ ≤ 180°	0.128	0.362	0.352	1.140	0.559–2.310	0.725
	PB/oolemma d	−0.142	0.452	−0.315	0.867	0.358–2.100	0.753
	Nonvisible	−0.298	0.162	−1.839	0.742	0.540–1.020	0.066
Short c	0° < θ ≤ 30°	0.008	0.092	0.086	1.010	0.841–1.210	0.931
	30° < θ ≤ 60°	0.131	0.110	1.191	1.140	0.919–1.420	0.234
	60° < θ ≤ 90°	0.026	0.150	0.177	1.030	0.765–1.380	0.860
	90° < θ ≤ 180°	0.424	0.223	1.903	1.530	0.987–2.360	0.057
	PB/oolemma d	−1.173	0.420	−2.794	0.309	0.136–0.705	0.005
	Nonvisible	−0.395	0.106	−3.739	0.673	0.547–0.829	<0.001
hCG‐ICSI interval b	0° < θ ≤ 30°	0.034	0.021	1.632	1.030	0.993–1.080	0.103
	30° < θ ≤ 60°	0.034	0.025	1.370	1.030	0.985–1.090	0.171
	60° < θ ≤ 90°	0.019	0.035	0.535	1.020	0.951–1.090	0.593
	90° < θ ≤ 180°	0.032	0.051	0.623	1.030	0.934–1.140	0.533
	PB/oolemma d	−0.256	0.071	−3.591	0.774	0.673–0.890	<0.0001
	Nonvisible	−0.192	0.022	−8.640	0.826	0.790–0.862	<0.0001

Note: Univariate multinominal logistic regression analysis.

Abbreviations: β, regression coefficient; CI, confidence interval; GnRH, gonadotropin‐releasing hormone; hCG, human chorionic gonadotropin; hCG‐ICSI interval, from hCG administration to the completion of ICSI; ICSI, intracytoplasmic sperm injection; OR, odds ratio; PPOS, progestin‐primed ovarian stimulation; SE β, standard error of the regression coefficient; θ, relative position of the meiotic spindle to the polar body.

^a Reference: θ = 0°.

^b Female age and the hCG‐ICSI interval were considered as a continuous variable.

^c Reference GnRH antagonist protocol.

^d Spindle bridge between the first polar body and the oolemma.