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. 2006 Aug 1;56(529):606–612.

Table 5.

Clinical rule performance in predicting laboratory diagnosis of urinary tract infection

Test
Standard Clinical rule−a Clinical rule+b Total
UTI− 106 48 154
UTI+ 90 164 254
Total 196 212
a

One or less of the following: moderately severe dysuria, moderately severe nocturia, urine smell offensive, urine cloudy or nitrite, or leucocyte and blood.

b

Two or more of the following: moderately severe dysuria, moderately severe nocturia, urine smell offensive, urine cloudy or nitrite, or leucocyte and blood. Sensitivity = 164/254 (65%; 95% CI = 58.7 to 70.5). Specificity = 106/154 (69%; 95% CI = 61.5 to 76.1). Positive predictive value = 164/212 (77%; 95% CI = 71.8 to 83.0). Negative predictive value 106/196 (54%, 47.1 to 61.1%). Likelihood ratio for a positive test = 2.07 (95% CI = 1.61 to 2.66). Likelihood ratio for a negative test = 0.51 (95% CI = 0.42 to 0.63). UTI = urinary tract infection.