Comparison of the diagnostic utility of CHOKAI, STONE and STONE PLUS scores in predicting ureteral stones larger than 5 mm

Abstract

Objective: The objective of this study is to assess the diagnostic accuracy of CHOKAI, STONE, and STONE plus scores in detecting ureteral stones larger than 5 mm. Methods: This comparative diagnostic accuracy study was performed in a tertiary care emergency department (ED) and included consecutive patients who presented to the ED with flank pain over a 1-year period. The performance of these scoring scales in detecting ureteral stones measuring >5 mm was determined by area under the receiver operating characteristics (AUROC) comparison. Results: Ureteral stones were detected in 270 (70.3%) of 384 patients included in the study. While 146 patients (54.1%) had ureteral stones measuring <5 mm, 124 patients (54.1%) had stones measuring 5 mm or more in size. The performance of the CHOKAI score in predicting ureteral stones was superior to that of the STONE PLUS score; STONE PLUS score was also superior to STONE score ( p < 0.001). Analysis of the diagnostic value of CHOKAI score and STONE PLUS scores in predicting >5-mm stones showed no statistically significant difference ( p = 0.59). Conclusion: CHOKAI and STONE PLUS scores are useful in predicting >5-mm ureteral stones and have similar diagnostic utility to each other. STONE score does not provide accurate diagnostic information about ureteral stones larger than 5 mm. Level of evidence: Level 2b