Table 2.

Multiple logistic regression between HPV variable and significant independent variables described in Table 1.

Multivariate analysis	Coefficient	Standard error	OR	95% CI	p-value
Null model vs. full model					< 0.0001*(C)
HPV/rapid progressive motility %	0.09	0.04	1.09	1.02–1.17	0.0148*
HPV/slow progressive motility %	− 0.07	0.03	0.94	0.89–0.99	0.0168*
HPV/non-progressive %	0.01	0.03	1.01	0.96–1.06	0.62
HPV/normal forms %	− 0.02	0.03	0.98	0.92–1.05	0.60
HPV/neck and midpiece defects %	0.11	0.04	1.11	1.04–1.19	0.0026*
HPV/tail defects %.	0.05	0.04	1.06	0.98–1.14	0.14
Constant	− 1.66	0.76	–	–	0.0286*

OR odds ratios; CI  odds ratios confidence interval at 95%; The null model= − 2ln[L₀], where L₀ was the likelihood of obtaining the observations if the independent variables did not affect the outcome, the full model: -2ln[L₀], where L₀ was the likelihood of obtaining the observations with all independent variables incorporated in the model; C = chi-square test. *Significant test.