Table 2 Predictors for intubation in derivation and full cohorts
Factor | Derivation cohort | Full cohort | |
|---|---|---|---|
Odds ratio (95% CI) | Odds ratio (95% CI) | Points | |
Number of organs failed | Â | Â | Â |
None | Referent | Referent | Â |
One | 2.29 (2.08, 2.53) | 2.37 (2.19, 2.56) | 4 |
Two or more | 5.46 (4.95, 6.02) | 5.34 (4.94, 5.78) | 8 |
Primary diagnostic group | Â | Â | Â |
Acute myocardial infarct | Referent | Referent | Â |
COPD/asthma | 3.24 (2.77, 3.80) | 2.94 (2.59, 3.34) | 5 |
Congestive heart failure | 1.80 (1.49, 2.17) | 1.52 (1.30, 1.78) | 2 |
Pneumonia or Sepsis | 3.94 (3.40, 4.56) | 3.54 (3.15, 3.98) | 6 |
Neuro non-stroke | 5.53 (4.55, 6.72) | 5.35 (4.56, 6.32) | 8 |
Stroke | 6.84 (5.62, 8.33) | 6.18 (5.28, 7.24) | 8 |
Substance abuse or psychosis | 10.09 (8.47, 12.01) | 8.70 (7.58, 9.99) | 10 |
Other | 1.78 (1.49, 2.14) | 1.54 (1.33, 1.77) | 2 |
Pneumonia (secondary dgn) | 2.27 (2.04, 2.53) | 2.21 (2.02, 2.42) | 4 |
Prior year invasive mechanical vent | 2.98 (2.51, 3.53) | 3.05 (2.65, 3.51) | 5 |
Systolic blood pressure | Â | Â | Â |
 ≥ 91 | Referent | Referent |  |
 ≤ 90 | 1.55 (1.42, 1.68) | 1.51 (1.42, 1.62) | 2 |
Body mass index | Â | Â | Â |
18.0—25.0 | Referent | Referent |  |
 < 18.5 | 1.18 (1.02, 1.36) | 1.23 (1.10, 1.39) | 1 |
Bicarbonate | Â | Â | Â |
22 – 27 | Referent | Referent |  |
 < 22 | 0.96 (0.88, 1.04) | 1.02 (0.96, 1.10) | 1 |
Weight loss (secondary dgn) | 1.51 (1.35, 1.68) | 1.48 (1.35, 1.62) | 2 |
No prior year admissions | 1.42 (1.31, 1.55) | 1.41 (1.32, 1.51) | 2 |
Respiratory rate | Â | Â | Â |
 ≤ 29 | Referent | Referent |  |
 ≥ 30 | 1.75 (1.33, 2.30) | 1.92 (1.53, 2.40) | 3 |