Table 3 Body mass index stratum specific time to event Hazard Ratios (HR) for the combined CKD event of CKD incidence, progression or End Stage Renal Disease in AKI group compared to non-AKI group including with interaction for body mass index

Events (n)

Overall

HR (95% CI)

p

HR (95% CI)

p

No AKI

1.0 (ref)

–

1.0 (ref)

–

AKI

2.73 (2.12, 3.51)

< 0.001

2.43 (1.87, 3.16)

< 0.001

BMI

HR (95% CI)

p

HR (95% CI)

p

  ≤ 20 kg/m²

0.80 (0.14, 4.38)

0.8

1.06 (0.19, 5.95)

0.9

 20–24.9 kg/m²

3.90 (1.93, 7.89)

< 0.001

4.04 (1.99, 8.22)

< 0.001

 25–29.9 kg/m²

2.12 (1.37, 3.28)

0.001

1.96 (1.26, 3.05)

0.003

  ≥ 30 kg/m²

3.06 (2.15, 4.37)

< 0.001

2.51 (1.74, 3.61)

< 0.001

p for interaction

0.2

0.3