Results
The mean follow-up time for the whole group was 21±11.1 months. The mean
number of stones in group 1 and group 2 was 1.25±0.11 and 1.56±0.19,
respectively. Postoperative stone-free rate after RIRS for group 1 and
group 2 were 37.25% (n=19/51) and 40.8% (n=51/125), respectively. The
SFR improved to 93.6% (n=117/125) in group 2. Multivariable analysis
showed that type of intervention, stone size, and body mass index were
independent prognostic factors for SREs. When group 2 was taken as a
reference, the odds ratio for SREs was 8.48 (95% CI: 2.95–24.42) in
group 1.