30-day readmission rate | Unadjusted model | Adjusted modela | P for interaction | ||||
---|---|---|---|---|---|---|---|
AKI (n = 24,833) | Non-AKI (n = 332,157) | HR (95% CI) | P-value | HR (95% CI) | P-value | ||
Overall (n = 356,990) | 22.4% | 15.8% | 1.47 (1.43–1.51) | < 0.001 | 1.07 (1.04–1.11) | < 0.001 | |
Age category | |||||||
40–64 years (n = 122,362) | 20.9% | 14.0% | 1.52 (1.43–1.63) | < 0.001 | 1.03 (0.96–1.10) | 0.45 | 0.13 |
≥ 65 years (n = 234,628) | 22.7% | 16.8% | 1.41 (1.36–1.45) | < 0.001 | 1.09 (1.05–1.13) | < 0.001 | |
Sexb | |||||||
Men (n = 149,333) | 22.0% | 16.7% | 1.36 (1.30–1.41) | < 0.001 | 1.03 (0.99–1.08) | 0.14 | 0.07 |
Women (n = 207,436) | 22.7% | 15.2% | 1.56 (1.50–1.62) | < 0.001 | 1.12 (1.07–1.17) | < 0.001 | |
Chronic kidney diseasec | |||||||
Chronic kidney disease (n = 47,999) | 27.7% | 24.2% | 1.14 (1.09–1.18) | < 0.001 | 1.03 (0.99–1.07) | 0.24 | 0.01 |
No chronic kidney disease (n = 308,991) | 22.3% | 16.8% | 1.32 (1.26–1.38) | < 0.001 | 1.09 (1.05–1.15) | < 0.001 |