TABLE 3

Test Characteristics of Single Components and Aggregate Urinalysis for Diagnosing UTI, Stratified by Bacteremia Status

Sensitivity (95% CI)Specificity (95% CI)
Identification of any UTI (N = 289)
 Any LE, n = 41470.92 (0.89–0.95)0.96 (0.95–0.96)
 Nitrites, n = 41470.38 (0.33–0.44)0.99 (0.99–1.00)
 Pyuria, >5 WBCs/HPF, n = 41000.82 (0.77–0.86)0.94 (0.93–0.94)
 LE or nitrites, n = 41470.93 (0.90–0.96)0.95 (0.95–0.96)
 Aggregate urinalysis (LE or nitrites or pyuria), n = 41470.94 (0.91–0.97)0.91 (0.90–0.91)
Identification of UTI with bacteremia (N = 27)
 Any LE, n = 38851.00 (0.87–1.00)0.96 (0.95–0.96)
 Nitrites, n = 38850.41(0.22–0.61)0.99 (0.99–1.00)
 Pyuria, >5 WBCs/HPF, n = 38580.77 (0.55–0.92)0.94 (0.93–0.94)
 LE or nitrites, n = 38851.00 (0.87–1.00)0.95 (0.95–0.96)
 Aggregate urinalysis (LE or nitrites or pyuria), n = 38851.00 (0.87–1.00)0.91 (0.90–0.91)
Identification of UTI without bacteremia (N = 262)
 Any LE, n = 41200.92 (0.88–0.95)0.96 (0.95–0.96)
 Nitrites, n = 41200.38 (0.32–0.44)0.99 (0.99–1.00)
 Pyuria, >5 WBCs/HPF, n = 40780.82 (0.77–0.87)0.94 (0.93–0.94)
 LE or nitrites, n = 41200.92 (0.88–0.95)0.95 (0.95–0.96)
 Aggregate urinalysis (LE or nitrites or pyuria), n = 41200.94 (0.90–0.96)0.91 (0.90–0.91)