Table 4

Post-test probabilities (95% CI).

Category of interestDerivationValidationDerivationValidation
Pre-test probability, %
1013
% with signPost-test probability, % (95% CI)
Neither sign73666.5 (3.1 to 11.7)13.7 (7.5 to 22.3)
Chest signs only162118.2 (6.9 to 35)13.8 (3.9 to 32)
Fever only9827.8 (9.6 to 53)9.1 (0 to 41)
Both signs2540.0 (5.2 to 85)0 (0 to 37)