| Odds of a composite complication of intubation b | |||
---|---|---|---|---|
 | Unadjusted (crude) | Adjusted a | ||
Variable | Odds ratio | 95% CI | Odds ratio | 95% CI |
Failed NIPPV | 1.50 | 0.90 to 2.51 | 2.20 | 1.14 to 4.25 |
Pneumonia or ARDS | 2.09 | 1.23 to 3.55 | 1.67 | 0.93 to 2.99 |
Total attempts | Â | Â | Â | Â |
  1 | Reference |  | Reference |  |
  2 | 2.17 | 1.16 to 4.03 | 2.35 | 1.19 to 4.64 |
  3 | 3.34 | 0.63 to 17.72 | 3.41 | 0.60 to 19.37 |
Operator PGY | Â | Â | Â | Â |
  1 | Reference |  | Reference |  |
  2 | 1.24 | 0.45 to 3.44 | 1.38 | 0.46 to 4.16 |
  3 | 1.3 | 0.44 to 3.82 | 1.00 | 0.31 to 3.19 |
  4 | 0.87 | 0.33 to 2.29 | 0.74 | 0.25 to 2.15 |
  5 | 1.25 | 0.46 to 3.38 | 1.14 | 0.39 to 3.40 |
  6 | 2.6 | 0.80 to 8.49 | 2.23 | 0.62 to 8.05 |
  Attending | 2.6 | 0.21 to 32.90 | 3.00 | 0.22 to 40.53 |
Propensity score | - | - | 0.09 | 0.02 to 0.44 |