Multivariate Multivariate Reduced (Backward) Reduced (Backward)
Variables OR (95% CI) P value OR (95% CI) P value
Stone-free status Stone length Stone area 1.046 (0.979-1.117) 1.004 (1.000-1.007) 0.182 0.025
Stone-free status
BMI 0.965 (0.905-1.029) 0.281
Stone location Lower pole Middle pole Upper pole Proximal ureter (U1) Middle ureter (U2) Ref. 0.492 (0.276-0.878) 0.512 (0.167-1.568) 0.399 (0.150-1.063) 0.227 (0.062-0.825) 0.016 0.241 0.066 0.024 Ref. 0.496 (0.290-0.849) 0.550 (0.181-1.665) 0.409 (0.157-1.061) 0.238 (0.067-0.844) 0.011 0.290 0.066 0.026
Stone density 1.001 (1.001-1.002) <0.001 1.001 (1.001-1.002) <0.001
Stone area 1.008 (1.006-1.009) <0.001 1.008 (1.006-1.009) <0.001
Number of stones
Single stone Ref.
Multiple stones 1.026 (0.543-1.937) 0.938