Baseline characteristics at admission
| Characteristic | N (%)/327 (100) |
| Demographics | |
| Age in years: median (IQR) | 38 (27,52) |
| Male | 197 (60.1) |
| Use firewood | 121 (36.8) |
| Smoking history | 50 (15) |
| Smoking pack years* | 0.95 (0.63) |
| History of asthma | 6 (1.8) |
| Previous history of acute lung injury admission | 18 (5.5) |
| Diagnosis at admission | |
| Pneumonia | 271 (82.6) |
| Cardiac disease | 28 (8.5) |
| Neurological disease | 85 (25.9) |
| HIV-positive | 101 (30.8) |
| Sepsis | 100 (30.4) |
| Clinical characteristics† Mean (SD) | |
| Lung Injury Prediction Score | 6.7 (0.8) |
| Heart rate | 117.8 (22.8) |
| Respiratory rate | 33.9 (8.9) |
| Mean arterial pressure (mm Hg) | 78.6 (23.3) |
| Temperature (oC) | 37.2 (1.1) |
| Pulse oximetry (SpO2) | 77.6 (12.7) |
| SpO2/F ratio | 193.9 (31.8) |
| White cell count (109/L)‡ | 11.9 (8.3) |
| Haemoglobin status g/dL‡ | 11.1 (3.9) |
| Platelet count (109/L)‡ | 243.2 (139.1) |
*Pack years (SD).
†Worst values were recorded in the 24 hours.
‡While patients got a full blood count done free of charge, only 313/327 had Full Blood Count results available.