Table 6.
Post-test probability of significant symptoms across three different reference standards 102, 103 and 105 CFU/ml
| Symptom | Reference standard* | +LR (95%CI) | Post-test probability (95%CI) (%) |
|---|---|---|---|
| Dysuria | 102 CFU/ml | 1.30 (1.20-1.41) | 71.0 (70.0-71.0) |
| 103 CFU/ml | 1.31 (1.18-1.45) | 62.3 (61.0-63.6) | |
| 105 CFU/ml | 1.22 (1.11-1.34) | 51.1 (49.5-52.8) | |
| Frequency | 102 CFU/ml | 1.10 (1.04-1.16) | 67.8 (67.0-68.5) |
| 103 CFU/ml | 1.12 (1.03-1.19) | 58.6 (57.5-59.5) | |
| 105 CFU/ml | 1.09 (1.02-1.16) | 47.8 (46.7-49.0) | |
| Hematuria | 102 CFU/ml | 1.72 (1.30-2.27) | 75.8 (70.9-80.1) |
| 103 CFU/ml | 1.68 (1.06-2.66) | 67.4 (60.6-73.6) | |
| Nocturia | 102 CFU/ml | 1.30 (1.08-1.56) | 69.4 (67.3-71.3) |
| 103 CFU/ml | 1.37 (1.13-1.65) | 60.8 (58.4-63.3) | |
| Urgency | 102 CFU/ml | 1.22 (1.11-1.34) | 69.8 (68.5-71.1) |
| 103 CFU/ml | 1.28 (1.11-1.47) | 61.7 (59.9-63.6) | |
| 105 CFU/ml | 1.17 (1.04-1.34) | 49.1 (47.1-51.1) | |
| Vaginal discharge | 102 CFU/ml | 0.65(0.51-0.83) | 54.1 (48.3 - 59.9) |
* Pretest probability is 65.1% at ≥ 102 CFU/ml; 55.4% at ≥ 103 CFU/ml and 44.8% at ≥ 105 CFU/ml