| RR (95% CI ) | p value |
---|---|---|
COPD diagnosis | Â | Â |
 Pre-existing COPD | 1.39 (1.01, 1.91) | 0.041 |
 No COPD diagnosis | Ref | Ref |
Dependence on supplemental oxygen | Â | Â |
 Yes | 1.58 (1.16, 2.15) | 0.004 |
 No | Ref | Ref |
BMI | Â | Â |
 < 25 | 1.70 (1.20, 2.41) | 0.003 |
 25.0–29.9 | 1.32 (0.86, 2.01) | 0.202 |
 ≥ 30.0 | Ref | Ref |
MICU | Â | Â |
 Yes | 0.63 (0.44, 0.91) | 0.013 |
 No | Ref | Ref |