Table 1.
Baseline characteristics of total study sample (N = 195)
| Mean (SD) | N (%) | Median | IQR | Min | Max | |
|---|---|---|---|---|---|---|
| Mean age, years | 86.3 (5.7) | 8 | 8 | 75 | 100 | |
| Female, N (%) | 122 (63) | |||||
| Charlson Comorbidity Index | 1.9 (1.7) | 2 | 2 | 0 | 9 | |
| Length of hospital stay, days | 8.5 (8.6) | 7 | 5 | 0 | 88 | |
| Frailty status | ||||||
| CFS score | 5.2 (1.5) | 5 | 2 | 1 | 8 | |
| CFS 1–3 (fit and well) | 23 (12) | |||||
| CFS 4 (very mild frailty) | 42 (22) | |||||
| CFS 5 (mild frailty) | 46 (24) | |||||
| CFS 6 (moderate frailty) | 44 (23) | |||||
| CFS 7–8 (Severe/very severe frailty) | 40 (21) | |||||
| Illness severity | ||||||
| NEWS2 score | 4.9 (2.7) | 4 | 4 | 0 | 13 | |
| High clinical illness severity* | 95 (49) | |||||
| FI-lab score | 0.37 (0.15) | 0.36 | 0.21 | 0.0 | 0.71 | |
| High laboratory illness severity** | 53 (27) | |||||
| Both high clinical and laboratory illness severity | 26 (13) | |||||
CFS Clinical Frailty Scale; CI confidence interval; FI-lab Frailty index of 14 routine blood tests; IQR interquartile range; N number of participants; NEWS2 New Early Warning Score 2, maximum value during hospital stay; SD Standard deviation
*High clinical illness severity = NEWS2-score ≥ 5
**High laboratory illness severity = FI-lab value ≥ 0.45