Table 1. Baseline Characteristics of Patients.
| Variable | Total group(n = 639) |
| Age in years, mean (SD) | 78.2 (7.8) |
| Sex | |
| Male, % (No.) | 46.2 (295) |
| Ethnicity | |
| Caucasian, % (No.) | 92.8 (593) |
| Living arrangement | |
| Independent, % (No.) | 72.4 (463) |
| Social status | |
| Living with partner or child, % (No.) | 47.9 (306) |
| Education in years, mean (SD) | 9.9 (3.9) |
| Medical reason for admission, %, (No.) | |
| Infectious disease | 40.9 (261) |
| Gastrointestinal disease | 22.8 (146) |
| Malignancy | 6.2 (40) |
| Cardiovascular disease | 4.3 (27) |
| Water and electrolyte disturbance | 10.5 (67) |
| Other | 15.4 (98) |
| Charlson comorbidity index score * , mean (SD) | 3.7 (2.4) |
*Range 0–31; a higher score indicates more and/or more severe comorbidities.