Bed-to-nurse grade | No. of patients | No. of deaths (%) | Model 1 OR (95% CI) | Model 2 OR (95% CI) |
---|---|---|---|---|
Overall | ||||
 Grade 1 | 11,691 | 531 (4.5) | Reference | Reference |
 Grade 2 | 5095 | 345 (6.8) | 1.71 (1.13–2.58) | 2.49 (1.46–4.24) |
 Grade 3 | 6797 | 468 (6.9) | 1.83 (1.21–2.76) | 3.61 (2.13–6.14) |
 Grade 4 or above | 4266 | 199 (4.7) | 1.27 (0.83–1.95) | 4.74 (2.65–8.46) |
 p-value |  |  | 0.003 | < 0.01 |
No-mechanical ventilation | ||||
 Grade 1 | 5081 | 69 (1.4) | Reference | Reference |
 Grade 2 | 2513 | 34 (1.4) | 1.36 (0.69–2.66) | 1.23 (0.63–2.39) |
 Grade 3 | 4877 | 59 (1.2) | 1.68 (0.90–3.14) | 1.51 (0.80–2.86) |
 Grade 4 or above | 3750 | 25 (0.7) | 1.27 (0.63–2.56) | 0.99 (0.45–2.14) |
 p-value |  |  | 0.395 | 0.359 |
Mechanical ventilation | ||||
 Grade 1 | 6610 | 462 (7.0) | Reference | Reference |
 Grade 2 | 2582 | 311 (12.0) | 2.00 (1.24–3.24) | 2.73 (1.51–4.95) |
 Grade 3 | 1920 | 409 (21.3) | 2.65 (1.65–4.25) | 4.02 (2.23–7.26) |
 Grade 4 or above | 516 | 174 (33.7) | 4.15 (2.50–6.89) | 7.83 (4.07–15.07) |
 p-value |  |  | < 0.01 | < 0.01 |