Table 3. Competing risk regression analyses of mortality in patients with serum potassium < 4.5 mmol/L according to dialysis modality.

Model (Number of mortality cases)	SHR (95% CI)	P-value
Total
Unadjusted (751)	1.71 (1.48, 1.97)	<0.001
Model I (751)	1.58 (1.37, 1.82)	<0.001
Model II (741)	1.55 (1.34, 1.79)	<0.001
Model III (644)	1.30 (1.10, 1.53)	0.002
Hemodialysis
Unadjusted (476)	1.64 (1.35, 1.99)	<0.001
Model I (476)	1.39 (1.15, 1.68)	<0.001
Model II (469)	1.30 (1.07, 1.58)	0.009
Model III (327)	1.14 (0.88, 1.46)	0.319
Peritoneal dialysis
Unadjusted (275)	2.06 (1.61, 2.64)	<0.001
Model I (275)	1.60 (1.25, 2.05)	<0.001
Model II (272)	1.56 (1.21, 2.01)	<0.001
Model III (215)	1.35 (1.00, 1.80)	0.048

Participants with serum potassium levels ≥ 4.5 mmol/L were considered as the reference group. Values given as hazard ratio (95% confidence interval).

Abbreviations: K, serum potassium levels; SHR, Sub-distribution hazard ratio; CI, confidence interval; MCCI, modified Charlson comorbidity index; BMI, body mass index; SGA, subjective global assessment; ALP, alkaline phosphatase.

Model I: adjusted for age and sex.

Model II: adjusted for Model I parameters as well as for MCCI.

Model III: adjusted for model II parameters as well as for BMI, SGA, albumin, ALP, Uric acid, Phosphorous, and Calcium (including dialysis time and Kt/V for hemodialysis).