Table 3.

Association between serum potassium variability and the risk of 1-year mortality

	Unadjusted		Model 1		Model 2		Model 3		Model 4
	OR (95% CI)	p value	OR (95% CI)	p value	OR (95% CI)	p value	OR (95% CI)	p value	OR (95% CI)	p value
CV1 (< 5%)	1(Reference)		1(Reference)		1(Reference)		1(Reference)		1(Reference)
CV2 (5%−10%)	1.85 (0.97–3.99)	0.086	1.63 (0.85–3.54)	0.172	1.42 (0.74–3.09)	0.331	2.25 (0.89–5.67)	0.085	2.15 (0.85–5.42)	0.106
CV3 (10%−15%)	3.47 (1.77–7.62)	0.001	2.79 (1.41–6.18)	0.006	1.93 (0.96–4.32)	0.082	3.32 (1.29–8.54)	0.013	2.92 (1.13–7.58)	0.027
CV4 (15%−20%)	7.23 (3.16–17.52)	< 0.001	5.73 (2.48–13.99)	< 0.001	3.25 (1.36–8.15)	0.009	4.81 (1.65–13.98)	0.004	4.54 (1.54–13.36)	0.006
CV5 (> 20%)	9.52 (2.81–28.99)	< 0.001	8.14 (2.38–25.08)	< 0.001	4.72 (1.32–15.17)	0.011	8.44 (2.26–31.50)	0.002	8.82 (2.39–32.62)	0.001

Model 1 was adjusted for sex and age; Model 2 was adjusted for sex and age plus acute myocardial infarction, heart failure, acute kidney failure, and diabetes mellitus. Model 3 was further adjusted for markers of illness severity (SOFA score, lactate, serum creatinine, white blood cell count, and hemoglobin). Model 4 was additionally adjusted for mechanical ventilation duration