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Table 4 Subgroup analysis of the associations between 90-day all-cause mortality and the admission serum potassium level

From: Admission serum sodium and potassium levels predict survival among critically ill patients with acute kidney injury: a cohort study

 

No. of patients/deaths

Admission serum potassium level, mmol/L

P for interaction

< 3.7

3.7–4.7

≥4.8

Age, years

  < 65

5772/956

1.06 (0.89, 1.26)

1.00

1.34 (1.14, 1.57)

0.790

  ≥ 65

7687/2139

1.13 (1.00, 1.28)

1.00

1.21 (1.09, 1.34)

Sex

 Male

7543/1766

1.13 (0.98, 1.31)

1.00

1.34 (1.20, 1.50)

0.043

 Female

6078/1388

1.11 (0.97, 1.28)

1.00

1.14 (0.99, 1.31)

Creatinine, mg/dl

  < 1.50

6295/1345

1.07 (0.93, 1.24)

1.00

1.33 (1.15, 1.54)

0.401

  ≥ 1.50

7324/1808

1.13 (0.98, 1.30)

1.00

1.20 (1.08, 1.34)

Urine output, ml/24 h

  < 1120

6487/1943

1.08 (0.96, 1.23)

1.00

1.23 (1.11, 1.37)

0.222

  ≥ 1120

6520/1069

1.11 (0.94, 1.31)

1.00

1.23 (1.06, 1.43)

Vasopressin use

 Yes

5907/1728

1.15 (1.01, 1.32)

1.00

1.34 (1.19, 1.51)

0.265

 No

7714/1426

1.07 (0.92, 1.24)

1.00

1.13 (0.99. 1.28)

Renal replacement therapy

 Yes

365/177

1.62 (1.03, 2.54)

1.00

1.58 (1.12, 2.23)

0.926

 No

13,265/2977

1.11 (1.00, 1.23)

1.00

1.22 (1.12, 1.34)

  1. Hazard ratio (95% CI): from Cox proportional hazards regression models. Covariates adjusted for: see model 2 in Table 1