Results
Five hundred and seventy-two patients were included in our study. The
patients’ demographics and characteristics are presented in Table 1. The
overall stone-free rate was 82.5%. There were 10 patients (1.7%) who
met the criteria for SIRS; for the remainder of the patients, there were
no infectious complications documented.
In SIRS group; mean stone volume, LOS, surgical time, and the rate of
recurrent UTI history were significant. No statistical difference was
observed in terms of the duration between PBUC and SULL between the
normal groups and the SIRS groups (Table 2).
In relation to the time interval between PBUC and post-SULL SIRS, no
statistically remarkable correlation was found (Table 3). To evaluate
the cut off duration of surgical time for SIRS, the ROC curve analysis
was performed. The cut off value for operation time in predicting
post-SULL SIRS was 47.5 minutes (The AUC: 0.877; sensitivity 100 %;
specificity 78.1 %; 95 % CI: 0.835-0.920).
This study demonstrates the risk factors for SIRS postoperatively that
were found significant in univariable analysis as presented in Table 3.
In univariable analysis; stone volume, surgical period, LOS, and the
history of recurrent UTI were detected as determinants of SIRS.
As we avoided using stone diameter and volume simultaneously in
multivariable analysis, considering these variables strongly correlated
with each other, this may lead to multicollinearity issues. LOS was
another factor that was not studied in the multivariable analysis. In
multivariable analysis, stone volume, operation time and the history of
recurrent UTI were revealed as significant variables. (Table 3).