Research Article
The Effectiveness of Dipstick for the Detection of Urinary Tract Infection
Table 2
Diagnostic performance of nitrite and leucocyte results relative to quantitative urine culture.
| | Culture | Sensitivity (%) (95% CI) | Specificity (%) (95% CI) | PPV (%) (95% CI) | NPV (%) (95% CI) | +LR (95% CI) | −LR (95% CI) |
| | NIT+ | 27.7 (17.3–40.2) | 98.4 (96.4–99.4) | 75.0 (53.3–90.2) | 88.4 (84.9–91.3) | 16.8 (6.93–40.72) | 0.74 (0.63–0.86) | | LE+ | 60.0 (47.1–72.0) | 73.9 (69.1–78.3) | 29.1 (21.6–37.7) | 91.2 (87.4–94.2) | 2.30 (1.77–2.99) | 0.54 (0.40–0.73) | | NIT+ or LE+ | 72.3 (59.8–89.7) | 72.5 (67.6–77.1) | 32.0 (24.5–40.2) | 93.6 (90.1–96.2) | 2.63 (2.10–3.30) | 0.38 (0.26–0.57) | | NIT+ and LE+ | 16.9 (8.8–28.3) | 99.7 (98.5–100) | 91.7 (61.5–99.8) | 87.1 (83.4–90.1) | 61.6 (8.1–69.04) | 0.83 (0.75–0.93) |
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NIT = nitrite, LE = leucocyte esterase, PPV = positive predictive value, NPV = negative predictive value, +LR = positive likelihood ratio, −LR = negative likelihood ratio.
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