Table 2

30-day hospital readmission risk at different periods for different age groups (N=13 802)

Variables30-day hospital readmission (%)P value
Complete sample7.8
Sex*
 Female vs male7.3 vs 8.2
Year-end age, in yearsNS
 65–697.5
 70–797.6
 80–898.4
 ≥906.4
Mobility clusterNS
 Preserved mobility vs impaired mobility7.6 vs 8.5
Activities in daily living (ADL)NS
 Full ADL ability vs impaired ADL7.8 vs 7.2
Cognitive statusNS
 Preserved cognitive status vs cognitive impairment7.8 vs 7.9
ICD-10 diagnosis: circulatory problems**
 No vs yes8.2 vs 6.5
ICD-10 diagnosis: infectionNS
 No vs yes7.7 vs 9.9
ICD-10 diagnosis: respiratory problemsNS
 No vs yes7.8 vs 8.0
ICD-10 diagnosis: trauma**
 No vs yes8.0 vs 5.8
ICD-10 diagnosis: tumour***
 No vs yes6.9 vs 15.1
Number of ICD-10 conditions***
 11.5
 24.9
 33.6
 44.8
 58.8
Number of surgical procedures (CHOP)*
 07.7
 17.8
 27.0
 37.3
 47.1
 59.7
Year of discharge: 2015–2018NS
 20158.3
 20168.0
 20178.0
 20186.8

  • *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.