Table 1.
Patient demographics
| Characteristics | Training Set |
Validation Set |
||||
|---|---|---|---|---|---|---|
| Cases | Control Subjects | P Values | Cases | Control Subjects | P Values | |
| Step-down unit admissions, n | 138 | 68 | 918 | 1,053 | ||
| Patients, n | 134 | 68 | 863 | 1,017 | ||
| Events, n | 322 | 370 | 918 | 1,053 | ||
| Male % | 57 | 61 | 0.371 | 58% | 60% | 0.299 |
| Race, white, % | 74 | 66 | 0.065 | 73% | 73% | 0.444 |
| Age, yr, mean ± SD | 59.24 ± 18.20 | 54.11 ± 20.13 | <0.001 | 61.69 ± 18.81 | 57.90 ± 19.96 | <0.001 |
| Charlson Deyo index, median (IQR) | 0 (0–1) | 0 (0–1) | 0.166 | 1 (0–3) | 1 (0–2) | <0.001 |
| Step-down unit length of stay, d, median (IQR) | 7 (4–9) | 3 (2–4) | <0.001 | 4 (2–6) | 2 (1–4) | <0.001 |
| Hospital of stay, d, median (IQR) | 11 (6–17) | 4 (2–9) | <0.001 | 8 (4–14) | 4 (2–9) | <0.001 |
| CRI events vital types, % | ||||||
| Heart rate | 10 | 8 | ||||
| Respiratory rate | 37 | 27 | ||||
| Peripheral SpO2 | 43 | 48 | ||||
| Blood pressure | 10 | 17 | ||||
Definition of abbreviations: IQR = interquartile range; CRI = cardiorespiratory insufficiency; SpO2 = oxygen saturation as measured by pulse oximetry.