Table 3. Logistic regression model coefficients.

Coefficients	Value
Intercept	-1.9
Age (y)	0.02
FSH (IU/L)	0.13
LH (IU/L)	0.03
Testosterone (ng/dL)	-0.002
Mean testis volume (cm3)	-0.08

FSH: follicle stimulating hormone, LH: luteinizing hormone, TT: total testosterone.

Probability of azoospermia=1/exp[-(b₀+b_i*X_i)].

b₀=FSH₁, b_i=0.95, X_i=independent variable.