| Predictor | Reference group | Odds ratios (95% CI) |
| SC | S Thal | 2.66 (1.12 to 6.31) |
| SS | 2.31 (1.08 to 4.95) | |
| Other/unknown | 9.17 (3.56 to 23.65) | |
| Pain in chest | No pain in chest | 2.35 (1.55 to 3.57) |
| Pain similar to previous | Pain not similar to previous | 0.60 (0.40 to 0.91) |
| Chills | No chills | 3.85 (1.69 to 8.79) |
| Temperature abnormal | Temperature normal | 4.37 (2.06 to 9.25) |
| Temperature not done | 0.74 (0.25 to 2.21) | |
| Pulse oximetry abnormal | Pulse oximetry normal | 4.72 (2.63 to 8.50) |
| Pulse oximetry not done | 1.62 (0.87 to 2.99) | |
| SC | S Thal | 2.97 (1.15 to 7.65) |
| SS | 1.95 (0.83 to 4.56) | |
| Other/unknown | 8.09 (2.84 to 23.08) | |
| Pain in chest | No pain in chest | 1.83 (1.13 to 2.97) |
| Pain similar to previous | Pain not similar to previous | 0.54 (0.34 to 0.85) |
| Chills | No chills | 2.42 (0.95 to 6.13) |
| Temperature abnormal | Temperature normal | 5.35 (2.29 to 12.49) |
| Temperature not done | 0.80 (0.23 to 2.70) | |
| Pulse oximetry abnormal | Pulse oximetry normal | 3.56 (1.85 to 6.85) |
| Pulse oximetry not done | 1.87 (0.93 to 3.74) | |
| Haemoglobin <10 | Haemoglobin ⩾10 | 2.88 (1.68 to 4.94) |
| Haemoglobin not measured | 0.36 (0.09 to 1.38) | |
| Nitrite positive | Nitrite negative | 4.11 (1.35 to 12.56) |
| Nitrite not assessed | 0.80 (0.49 to 1.31) | |
| Chronic abnormality | Normal on CXR | 1.82 (1.01 to 3.27) |
| Acute abnormality | 5.75 (2.69 to 12.31) | |
| Not done | 0.71 (0.35 to 1.42) |
CXR, chest x ray; SC, sickle cell haemogoblin C disease; SS, homozygous sickle cell disease; S Thal, sickle cell beta thalassaemia disease.
CXR, chest x ray; SC, sickle cell haemogoblin C disease; SS, homozygous sickle cell disease; S Thal, sickle cell beta thalassaemia disease.