Table 1.

Logistic regression model. Dependent variable: sperm concentration.

	Estimate	Standard error	Z value	OR	CI (95%)	p value
Age	0.053	0.026	2.048	1.054	(1.003–1.110)	0.041*
USVG 2	0.703	0.497	1.412	2.019	(0.769–5.506)	0.158
USVG 3	1.081	0.511	2.114	2.946	(1.095–8.267)	0.035*
RSV	−1.090	0.431	−2.531	0.336	(0.141–0.771)	0.011*
Operation time	0.003	0.008	0.415	1.003	(0.988–1.020)	0.678

Intercept is omitted.

^*<0.05 CI, confidence interval; OR, odds ratio; RSV: subclinical right varicocele; USVG: ultrasound varicocele grading.