Bivariate analysis of factors associated with mortality
| Characteristic | Outcome n (% row) | Crude risk ratio (95% CI) | P value | |
| Dead | Alive | |||
| 254 (77.7) | 73 (22.3) | |||
| Sex | ||||
| Female | 97 (74.6) | 33 (25.4) | 1 | |
| Male | 157 (79.7) | 40 (20.3) | 1.07 (0.94 to 1.21) | 0.293 |
| Previous history of acute lung injury admission | ||||
| No | 240 (77.7) | 69 (22.3) | 1 | |
| Yes | 14 (77.8) | 4 (22.2) | 1.00 (0.78 to 1.29) | 0.991 |
| Smoked | ||||
| No | 215 (77.6) | 62 (22.4) | 1 | |
| Yes | 39 (78.0) | 11 (22.0) | 1.00 (0.86 to 1.18) | 0.952 |
| Had asthma | ||||
| No | 250 (77.9) | 71 (22.1) | 1 | |
| Yes | 4 (66.7) | 2 (33.3) | 0.86 (0.48 to 1.51) | 0.593 |
| Had pneumonia | ||||
| No | 44 (77.2) | 13 (22.8) | 1 | |
| Yes | 210 (77.8) | 60 (22.2) | 1.01 (0.86 to 1.18) | 0.924 |
| Had a cardiac disease | ||||
| No | 234 (78.3) | 65 (21.7) | 1 | |
| Yes | 20 (71.4) | 8 (28.6) | 0.91 (0.72 to 1.16) | 0.459 |
| Neuro | ||||
| Yes | 186 (76.9) | 56 (23.1) | 1 | |
| No | 68 (80.0) | 17 (20.0) | 1.04 (0.92 to 1.18) | 0.536 |
| Liver | ||||
| No | 245 (77.8) | 70 (22.2) | 1 | |
| Yes | 9 (75.0) | 3 (25) | 0.96 (0.69 to 1.34) | 0.830 |
| HIV status | ||||
| No | 179 (79.2) | 47 (20.8) | 1 | |
| Yes | 75 (74.3) | 26 (25.7) | 0.94 (0.82 to 1.0.7) | 0.341 |
| Dead | Discharged | |||
| SPO2 /FiO2 | ||||
| <200 | 139 (88.0) | 19 (12.0) | 1 | |
| 201 or more | 115 (68.1) | 54 (31.9) | 0.77 (0.69 to 0.87) | <0.001 |
| LIPS | ||||
| Low | 14 (48.3) | 15 (51.7) | 1 | |
| High (six or more) | 240 (80.5) | 58 (19.5) | 1.67 (1.14 to 2.44) | 0.009 |
| Heart rate | ||||
| Normal | 41 (74.6) | 41 (25.4) | 1 | |
| Abnormal (>100) | 205 (77.9) | 58 (22.1) | 1.05 (0.88 to 1.24) | 0.602 |
| Respiratory rate | ||||
| 26 (81.3) | 6 (18.7) | 1 | ||
| 74 (76.3) | 23 (23.7) | 0.94 (0.77 to 1.15) | 0.538 | |
| 154 (77.8) | 44 (22.2) | 0.96 (0.80 to 1.15) | 0.639 | |
| MAP | ||||
| Normal | 168 (72.4) | 64 (27.6) | 1 | |
| Abnormal (<65) | 86 (90.5) | 9 (9.5) | 1.25 (1.13 to 1.39) | <0.001 |
| SPO2% | ||||
| Normal (85+) | 77 (64.2) | 43 (35.8) | 1 | |
| Abnormal | 177 (85.5) | 30 (14.5) | 1.33 (1.15 to1.54) | <0.001 |
| WBC×10 ul | ||||
| Normal | 108 (68.3) | 50 (31.7) | 0.36 (0.13 to 0.98) | 0.046 |
| Abnormal (>12 000 or <4000) | 126 (84.6) | 23 (15.4) | 0.89 (0.30 to 2.60) | 0.830 |
| Haemoglobin (/dl) | ||||
| Normal | 176 (75.2) | 58 (24.8) | 1 | |
| Abnormal (<8) | 55 (83.3) | 11 (16.7) | 1.11 (0.97 to 1.26) | 0.124 |
| Platelet count (×109/ul) | ||||
| Normal | 166 (74.4) | 57 (25.6) | 1 | |
| Abnormal (<100) | 29 (96.7) | 1 (3.3) | 1.30 (1.17 to 1.44) | <0.001 |
MAP, mean arterial pressure.