Table 3.

Univariate and multivariate analyses for the identification of factors associated with stone-free rate

Risk factors	Univariate OR (95% CI)	p	Multivariate OR (95% CI)	p
Age	1.010 (0.860–1.185)	0.907
Gender	2.538 (0.705–9.135)	0.154
Stone diameter (cm)	4.178 (1.156–11.292)	0.005	3.274 (1.124–9.533)	0.030
Stone location	1.051 (0.502–2.198)	0.896
Staghorn calculi	24.857 (3.855–160.296)	0.001	13.193 (1.881–92.537)	0.009
Hydronephrosis	0.856 (0.290–2.527)	0.779

CI: confidence interval; OR: odds ratio.