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Post-test probabilities (95% CI).
| Category of interest | Derivation | Validation | Derivation | Validation |
|---|---|---|---|---|
| Pre-test probability, % | ||||
| 10 | 13 | |||
| % with sign | Post-test probability, % (95% CI) | |||
| Neither sign | 73 | 66 | 6.5 (3.1 to 11.7) | 13.7 (7.5 to 22.3) |
| Chest signs only | 16 | 21 | 18.2 (6.9 to 35) | 13.8 (3.9 to 32) |
| Fever only | 9 | 8 | 27.8 (9.6 to 53) | 9.1 (0 to 41) |
| Both signs | 2 | 5 | 40.0 (5.2 to 85) | 0 (0 to 37) |
