Table 5.

Association between serum potassium variability and risk of mortality in the subgroup.

CVSP	N patients (%)	HR (95%, CI), All-cause mortality				HR (95%, CI), Cardiovascular mortality
		Unadjusted	p-value	Adjusted	p-value	Unadjusted	p-value	Adjusted	p-value
L-CVSP	366 (74.2%)	1.00 (reference)		1.00 (reference)		1.00 (reference)		1.00 (reference)
M-CVSP	88 (17.8%)	1.33 (0.81, 2.19)	0.26	1.03 (0.62, 1.73)	0.90	0.93 (0.39, 2.24)	0.88	0.76 (0.30, 1.92)	0.56
H-CVSP	39 (8.9%)	2.36 (1.21, 4.60)	< 0.05	1.81 (0.91, 3.59)	0.92	3.35 (1.39, 8.12)	< 0.01	2.69 (1.07, 6.78)	< 0.05

CVSP the coefficient of variation of serum potassium levels, HR hazard ratio.