Predictors of hospital admission cost
| Variable | Adjusted cost ratio (95% CI) |
|---|---|
| Age ≥ 65 yr | 0.93 (0.86–1.01) |
| Sex, male | 1.10 (1.02–1.18) |
| ICU admission within past yr | 1.16 (0.98–1.37) |
| Admitting service | |
| General surgery | 1.30 (1.15–1.46) |
| Orthopedics | 1.19 (1.06–1.35) |
| Neurosurgery | 1.83 (1.58–2.13) |
| Trauma | 2.19 (1.57–3.05) |
| Vascular surgery | 1.17 (1.02–1.35) |
| Other | Ref. |
| Level of care designation | |
| Full care including ICU admission and CPR | Ref. |
| Full care including ICU admission with no CPR | 1.39 (1.20–1.63) |
| Full care excluding ICU admission and CPR | 0.84 (0.75–0.95) |
| Reason for activation | |
| Airway concerns | 1.21 (0.96–1.52) |
| Respiratory | 1.29 (1.16–1.44) |
| Arrhythmias | 0.97 (0.87–1.07) |
| Decreased level of consciousness | 1.02 (0.91–1.14) |
| Hypotension | 0.98 (0.88–1.10) |
| Other | Ref. |
| Multiple RRT activations | 1.54 (1.42–1.68) |
| Emergent (nonelective) operation | 0.95 (0.87–1.03) |
| Multiple operations | 2.44 (2.23–2.67) |
| ASA class | |
| 5 | 3.55 (2.26–5.60) |
| 4 | 3.15 (2.08–4.77) |
| 3 | 2.47 (1.64–3.73) |
| 2 | 1.81 (1.18–2.79) |
| 1 | Ref. |
| Elixhauser Comorbidity Index score | |
| ≤ 0 | Ref. |
| 1 – 19 | 1.06 (0.97–1.15) |
| ≥ 20 | 1.39 (1.19–1.62) |
ASA = American Society of Anesthesiologists; CI = confidence interval; CPR = cardiopulmonary resuscitation; ICU = intensive care unit; Ref. = reference; RRT = rapid response team.