Table 3.
Diagnostic accuracy of urine dipstick and distribution of dipstick results
| UTI* | No UTI** | Total (%) | |||
|---|---|---|---|---|---|
|
Positive dipstick |
279 | 29 | 308 (83.7) | ||
| Negative dipstick | 19 | 41 | 60 (16.3) | ||
| Total (%) | 298 (81.0) | 70 (19.0) | 368 (100) |
| Sensitivity (%) (CI) |
Specificity (%) (CI) |
PPV (%) (CI) |
NPV (%) (CI) |
LR + (CI) | LR—(CI) |
|---|---|---|---|---|---|
|
93.6 (90.1—95.9) |
58.6 (45.4—70.6) |
90.6 (86.5—93.5) |
68.3 (54.4—79.6) |
2.26 (1.76—3.06) |
0.11 (0.06—0.22) |
Positive dipstick = nitrite positive and/or LE ≥ + 1
CI 95% Confidence Interval, NPV Negative Predictive Value, PPV Positive Predictive Value, LR + Positive Likelihood Ratio, LR Negative Likelihood Ratio
Legend: * Reference standard score ≥, ** Reference standard score < 5