TY - JOUR
TI - External validation of Resorlu–Unsal stone score as predictor of outcomes after retrograde intrarenal surgery
AU - Sfoungaristos, S.
AU - Gofrit, O.N.
AU - Mykoniatis, I.
AU - Landau, E.H.
AU - Katafigiotis, I.
AU - Pode, D.
AU - Constantinides, C.A.
AU - Duvdevani, M.
JO - International Urology and Nephrology
PY - 2016
VL - 48
TODO - 8
SP - 1247-1252
PB - SPRINGER NETHERLANDS
SN - 0301-1623
TODO - 10.1007/s11255-016-1311-2
TODO - creatinine, adult;  area under the curve;  Article;  controlled study;  creatinine blood level;  external validity;  female;  fever;  human;  intraoperative period;  kidney surgery;  major clinical study;  male;  measurement accuracy;  nephrolithiasis;  nomogram;  postoperative period;  predictor variable;  prospective study;  receiver operating characteristic;  Resorlu Unsal stone score;  retrograde intrarenal surgery;  scoring system;  treatment outcome;  urinary tract infection;  aged;  cohort analysis;  factual database;  follow up;  Kidney Calculi;  middle aged;  minimally invasive surgery;  nonparametric test;  percutaneous nephrostomy;  predictive value;  procedures;  risk assessment;  severity of illness index;  validation study, Adult;  Aged;  Area Under Curve;  Cohort Studies;  Databases, Factual;  Female;  Follow-Up Studies;  Humans;  Kidney Calculi;  Male;  Middle Aged;  Minimally Invasive Surgical Procedures;  Nephrostomy, Percutaneous;  Predictive Value of Tests;  Prospective Studies;  Risk Assessment;  ROC Curve;  Severity of Illness Index;  Statistics, Nonparametric;  Treatment Outcome
TODO - Purpose: To externally validate Resorlu–Unsal stone score (RUSS) and to evaluate its predictive accuracy. Methods: Data of patients who underwent retrograde intrarenal surgery (RIRS) between October 2013 and June 2015 were collected. RUSS was applied to all patients, and the nomogram was externally validated. Area under the curve (AUC) was used for clinical validity assessment. Results: A total of 85 patients were included in the study. Mean patient age was 54.3 ± 16.5, and mean stone size was 12.0 ± 6.21 mm. After applying RUSS, 56.5, 28.2, 9.41, and 5.88 % had score 0, 1, 2, and 3, respectively. RUSS was significantly associated with stone location and size. Postoperative stone-free rate was 74.1 %. Postoperative outcomes were significantly associated with RUSS and stone size. RUSS was found to be the only significant independent predictor in multivariate analysis, while it provided high predictive accuracy with an estimated AUC of 0.707. Conclusions: RUSS is a simple scoring system that may predict postoperative stone-free rate after RIRS with great efficacy and accuracy. © 2016, Springer Science+Business Media Dordrecht.
ER -