Table 2.
Odds ratios associated with coefficients of final risk score model.
| Factor | Odds ratio | 95% CI | P |
| Age∗ | |||
| 50 (referent) | 1.00 | ||
| 30 | 0.28 | (0.09–0.87) | |
| 40 | 0.53 | (0.32–0.87) | |
| 60 | 1.87 | (1.58–2.22) | |
| 70 | 3.26 | (2.64–4.02) | |
| 80 | 5.26 | (4.07–6.81) | |
| Respiratory rate | |||
| Less than 20 (referent) | 1.00 | ||
| 20–24 | 1.50 | (1.06–2.12) | .022 |
| 25–30 | 2.57 | (1.68–3.93) | <.001 |
| Greater than 30 | 3.88 | (2.42–6.23) | <.001 |
| Pulse oximetry | |||
| 91%–100% (referent) | 1.00 | ||
| 81%–90% | 1.44 | (1.00–2.07) | .05 |
| 71%–80% | 3.66 | (1.81–7.42) | <.001 |
| 70% or less | 5.57 | (2.22–13.92) | <.001 |
| Creatinine (log transformed) | 2.29 | (1.85–2.84) | <.001 |
| Hospital mortality rate (logit transformed) | 2.81 | (2.28–3.45) | <.001 |
| Constant | 0.06 | (0.02–0.14) | <.001 |
CI = confidence interval, P = P value.
∗
We applied a spline transformation on age, however the spline regression coefficients are not interpretable. Therefore, in this table we display the estimated odds ratios for different ages as compared to 50 years as a reference age. The coefficients for the spline are significant with p-values <.001. See Figure S4, Supplemental Digital Content, for an illustration of the odds ratios and confidence intervals for age with 50 years as a reference age for the full range of ages in the data.