Table 3 Hazard ratio for all-cause readmission during 90-day periods after index hospitalization for acute exacerbation of chronic obstructive pulmonary disease, according to acute kidney injury, overall and stratified by age category and sex and chronic kidney disease

39.7%

31.0%

1.35 (1.32–1.38)

< 0.001

1.03 (1.00–1.05)

0.04

37.6%

27.8%

1.43 (1.36–1.50)

< 0.001

1.00 (0.95–1.06)

0.86

0.10

40.2%

32.8%

1.29 (1.26–1.32)

< 0.001

1.03 (1.00–1.06)

0.03

38,9%

32.2%

1.26 (1.22–1.29)

< 0.001

0.99 (0.96–1.03)

0.59

0.06

40.5%

30.2%

1.43 (1.39–1.48)

< 0.001

1.06 (1.02–1.09)

0.001

43.0%

40.9%

1.06 (1.03–1.09)

0.001

0.98 (0.95–1.02)

0.21

< 0.001

35.7%

29.9%

1.22 (1.18–1.26)

< 0.001

1.04 (1.00–1.07)

0.04