TABLE 2

LRs (With 95% CIs) of Screening Tests for the Diagnosis of UTI According to SG

Test Cutoff, Sample SizePositive LR (95% CI)Negative LR (95% CI)
SG <1.015SG ≥1.015SG <1.015SG ≥1.015
LE test ≥1+ (n = 10 078)11.76 (10.65–12.99)10.71 (9.38–12.23)0.14 (0.11–0.18)0.22 (0.16–0.29)
Nitrite test positive result (n = 10 076)20.54 (16.11–26.20)47.44 (32.02–70.29)0.68 (0.63–0.73)0.62 (0.55–0.69)
WBC/hpf ≥5 (n = 2163)9.83 (8.01–12.06)6.12 (4.95–7.57)0.18 (0.12–0.28)0.15 (0.06–0.36)
WBC per mm3 ≥10 (n = 7797)10.61 (9.47–11.89)7.16 (6.36–8.07)0.19 (0.15–0.24)0.17 (0.12–0.25)
Bacteria per hpf ≥ few (n = 1240)3.62 (3.04–4.32)3.55 (2.79–4.53)0.24 (0.16–0.37)0.24 (0.11–0.53)
Bacteria on Gram-stain ≥ any (n = 7781)18.11 (15.65–20.97)33.38 (25.67–43.41)0.20 (0.16–0.25)0.28 (0.22–0.36)