Association between mortality and number of risk factors (stridor when calm, grunting, haemoglobin <50 g/L, malaria test positive)
| Risk factors (n) | OR (95% CI) | P value |
| 1 | Referent | – |
| 2 | 4.5 (1.4 to 14.1) | <0.01 |
| 3 | 14.7 (4.3 to 50.1) | <0.01 |
| 4 | 26.2 (4.4 to 153.7) | <0.01 |