Table 8.
Post-test probability of significant symptoms with a positive (LR 1.36) or negative dipstick (LR 0.36) test for leucocyte-esterase [23]
| Symptom | Reference standard | Pre-test probability (95%CI) (%) |
Post-test probability (95%CI) (LR+) |
Post-test probability (95% CI) (LR-) |
|---|---|---|---|---|
| Dysuria | 102 CFU/ml | 71.0 (70.0-71.0) | 76.9 (76.0-76.9) | 46.8 (45.7-46.8) |
| 103 CFU/ml | 62.3 (61.0-63.6) | 69.2 (68.0-70.4) | 37.3 (36.0-38.6) | |
| 105 CFU/ml | 51.1 (49.5-52.8) | 58.7 (57.1-60.3) | 27.3 (26.1-28.7) | |
| Frequency | 102 CFU/ml | 67.8 (67.0-68.5) | 74.1 (73.4-74.7) | 43.1 (42.2-43.9) |
| 103 CFU/ml | 58.6 (57.5-59.5) | 65.8 (64.8-66.6) | 33.8 (32.8-34.6) | |
| 105 CFU/ml | 47.8 (46.7-49.0) | 55.5 (54.4-56.6) | 24.8 (24.0-25.7 | |
| Hematuria | 102 CFU/ml | 75.8 (70.9-80.1) | 81.0 (76.8-84.6) | 53.0 (46.7-59.2) |
| 103 CFU/ml | 67.4 (60.6-73.6) | 73.8 (67.7-79.1) | 42.7 (35.6-50.1) | |
| Nocturia | 102 CFU/ml | 69.4 (67.3-71.3) | 75.5 (73.7-77.2) | 44.9 (42.6-47.2) |
| 103 CFU/ml | 60.8 (58.4-63.3) | 67.8 (65.6-70.1) | 35.8 (33.6-38.3) | |
| Urgency | 102 CFU/ml | 69.8 (68.5-71.1) | 75.9 (74.7-77.0) | 45.4 (43.9-47.0) |
| 103 CFU/ml | 61.7 (59.9-63.6) | 68.7 (67.0-70.4) | 36.7 (35.0-38.6) | |
| 105 CFU/ml | 49.1 (47.1-51.1) | 56.7 (55.0-58.7) | 25.8 (24.3-27.3) | |
| Vaginal discharge | 102 CFU/ml | 54.1 (48.3 - 59.9) | 61.6 (56.0-67.0) | 29.8 (25.2-35.0) |