Table 1.
Age-specific rates of readmissions with 28 days and mortality within 30 days or six months and over two years of hospital discharge, according to the initial length of stay in hospital in 32 270 alive discharge episodes
| Rates (%) | Group differences | ||||
|---|---|---|---|---|---|
| Bottom tertile (n = 10 754) | Middle tertile (n = 10 757) | Top tertile (n = 10 759) | χ2 | P | |
| Readmissions within 28 days | |||||
| 18–49 years: 1 readmission | 3.3 | 5.1 | 11.3 | 259.4 | <0.001 |
| 18–49 years: ≥2 readmissions | 0.2 | 1.1 | 4.3 | ||
| 50–59 years: 1 readmission | 2.8 | 5.1 | 12.5 | 206.2 | <0.001 |
| 50–59 years: ≥2 readmissions | 0.2 | 0.9 | 4.9 | ||
| 60–69 years: 1 readmission | 3.1 | 5.7 | 11.9 | 249.9 | <0.001 |
| 60–69 years: ≥2 readmissions | 0.1 | 1.1 | 6.4 | ||
| 70–79 years: 1 readmission | 3.2 | 4.7 | 14.1 | 425.1 | <0.001 |
| 70–79 years: ≥2 readmissions | 0.2 | 1.2 | 7.4 | ||
| ≥80 years: 1 readmission | 5.5 | 9.4 | 18.2 | 574.4 | <0.001 |
| ≥80 years: ≥2 readmissions | 0.5 | 2.2 | 10.7 | ||
| All ages: 1 readmission | 3.5 | 6.0 | 15.3 | 2538.5 | <0.001 |
| All ages: ≥2 readmissions | 0.2 | 1.3 | 8.3 | ||
| Died within 30 days | |||||
| 18–49 years | 0.0 | 0.1 | 1.1 | 51.5 | <0.001 |
| 50–59 years | 0.3 | 0.4 | 1.9 | 27.8 | <0.001 |
| 60–69 years | 0.8 | 1.1 | 3.6 | 40.1 | <0.001 |
| 70–79 years | 1.4 | 1.6 | 5.1 | 69.2 | <0.001 |
| ≥80 years | 2.6 | 3.0 | 8.5 | 124.5 | <0.001 |
| All ages | 0.8 | 1.1 | 5.8 | 6771 | <0.001 |
| Died within six months | |||||
| 18–49 years | 0.2 | 0.3 | 2.5 | 89.1 | <0.001 |
| 50–59 years | 0.8 | 1.1 | 5.8 | 84.7 | <0.001 |
| 60–69 years | 2.1 | 2.6 | 10.5 | 142.7 | <0.001 |
| 70–79 years | 3.8 | 4.3 | 13.2 | 168.1 | <0.001 |
| ≥80 years | 8.7 | 10.3 | 20.2 | 187.3 | <0.001 |
| All ages | 2.4 | 3.5 | 14.4 | 1487.7 | <0.001 |
| Died over two years | |||||
| 18–49 years | 0.5 | 0.5 | 3.6 | 99.6 | <0.001 |
| 50–59 years | 1.5 | 1.9 | 8.5 | 111.4 | <0.001 |
| 60–69 years | 3.1 | 4.4 | 13.9 | 163.4 | <0.001 |
| 70–79 years | 7.1 | 7.4 | 20.1 | 222.5 | <0.001 |
| ≥80 years | 15.2 | 16.8 | 28.5 | 187.2 | <0.001 |
| All ages | 4.3 | 5.8 | 20.6 | 1886.4 | <0.001 |
| Underlying health status | |||||
| Acute admission | 64.3 | 67.1 | 85.5 | 1422 | <0.001 |
| CCI score = 0 | 96.7 | 93.5 | 88.3 | 606.1 | <0.001 |
| CCI score = 1 | 2.7 | 5.4 | 10.5 | ||
| CCI score = 2 | 0.7 | 1.0 | 1.2 | ||
| ED visits within six months | 77.3 | 72.6 | 88.8 | 923 | <0.001 |
| Selected index admissions | |||||
| Congestive heart failure | 0.4 | 0.9 | 2.5 | 395.4 | <0.001 |
| Pneumonia | 1.9 | 4.7 | 9.1 | 568.3 | <0.001 |
| Stroke | 0.7 | 1.9 | 5.4 | 502.6 | <0.001 |
| Diabetes | 0.8 | 1.1 | 1.3 | 13.2 | <0.001 |
| Sepsis | 1.7 | 3.3 | 5.9 | 282.8 | <0.001 |
| Urinary tract infection | 2.2 | 3.0 | 5.1 | 147.2 | <0.001 |
CCI, Charlson comorbidity index; ED, emergency department.