Table 2. Misclassification rates for urine dipstick analysis.
|
Parameter (N = 321) |
T0 vs. T1 | T0 vs. T2 |
P (T0 vs. T1) |
P (T0 vs. T2) |
|---|---|---|---|---|
| pH |
27 (8.4) |
33 (10.3) |
P < 0.001 |
P < 0.001 |
| Leukocytes (/µL) |
45 (14.0) |
31 (9.7) |
P < 0.001 |
P < 0.001 |
| Nitrite (pos/neg) |
12 (3.7) |
17 (5.3) |
P < 0.001 |
P < 0.001 |
| Protein (mg/dL) |
22 (6.9) |
30 (9.3) |
P < 0.001 |
P < 0.001 |
| Glucose (mg/dL) |
1 (0.3) |
3 (0.9) |
P = 0.250 |
P = 1.000 |
| Ketone (mg/dL) |
29 (9.0) |
28 (8.7) |
P < 0.001 |
P < 0.001 |
| Urobilinogen (mg/dL) |
6 (1.9) |
4 (1.2) |
P = 0.031 |
P = 0.125 |
| Bilirubin (mg/dL) |
1 (0.3) |
4 (1.2) |
P = 1.000 |
P = 0.125 |
| Blood (/µL) |
37 (11.5) |
64 (19.9) |
P < 0.001 |
P < 0.001 |
| Specific gravity | 35 (10.9) | 57 (17.8) | P < 0.001 | P < 0.001 |
Shown are misclassification rates (absolute numbers and percent (in brackets)) and P values (McNemars’ tests) for urine dipstick analysis parameters pH, leukocytes, nitrite, protein, glucose, ketone, urobilinogen, bilirubin, blood and specific gravity for the respective time points (T0 - within 90 min, T1 - 120 min after collection, T2 - 240 min after collection, T0 vs. T1 - within 90 min in comparison to 120 min after collection, T0 vs. T2 within 90 min in comparison to 240 min after collection).