Table 2.
30-day hospital readmission risk at different periods for different age groups (N=13 802)
| Variables | 30-day hospital readmission (%) | P value |
| Complete sample | 7.8 | |
| Sex | * | |
| Female vs male | 7.3 vs 8.2 | |
| Year-end age, in years | NS | |
| 65–69 | 7.5 | |
| 70–79 | 7.6 | |
| 80–89 | 8.4 | |
| ≥90 | 6.4 | |
| Mobility cluster | NS | |
| Preserved mobility vs impaired mobility | 7.6 vs 8.5 | |
| Activities in daily living (ADL) | NS | |
| Full ADL ability vs impaired ADL | 7.8 vs 7.2 | |
| Cognitive status | NS | |
| Preserved cognitive status vs cognitive impairment | 7.8 vs 7.9 | |
| ICD-10 diagnosis: circulatory problems | ** | |
| No vs yes | 8.2 vs 6.5 | |
| ICD-10 diagnosis: infection | NS | |
| No vs yes | 7.7 vs 9.9 | |
| ICD-10 diagnosis: respiratory problems | NS | |
| No vs yes | 7.8 vs 8.0 | |
| ICD-10 diagnosis: trauma | ** | |
| No vs yes | 8.0 vs 5.8 | |
| ICD-10 diagnosis: tumour | *** | |
| No vs yes | 6.9 vs 15.1 | |
| Number of ICD-10 conditions | *** | |
| 1 | 1.5 | |
| 2 | 4.9 | |
| 3 | 3.6 | |
| 4 | 4.8 | |
| 5 | 8.8 | |
| Number of surgical procedures (CHOP) | * | |
| 0 | 7.7 | |
| 1 | 7.8 | |
| 2 | 7.0 | |
| 3 | 7.3 | |
| 4 | 7.1 | |
| 5 | 9.7 | |
| Year of discharge: 2015–2018 | NS | |
| 2015 | 8.3 | |
| 2016 | 8.0 | |
| 2017 | 8.0 | |
| 2018 | 6.8 | |
*P<0.05, **P<0.01, ***P< 0.001.
CHOP, Swiss Classification of Surgical Interventions; ICD-10, International Classification of Diseases, 10th Revision; NS, non-significant.