Table 4.

Hazard Ratios and 95% Confidence Intervals for Cardiovascular Mortality Associated with Serum Potassium from Cox Regression Models^*

Characteristic	Hazard Ratio	95% Confidence Interval
SK × diuretic use
Interaction term	2.9	1.0 to 8.0
SK (low vs middle)	1.2	0.73 to 1.9
SK (high vs middle)	1.5	0.99 to 2.2
SK × renal function
Interaction term	1.8	0.82 to 4.1
SK (low vs middle)	1.0	0.64 to 1.6
SK (high vs middle)	1.4	0.91 to 2.2
SK × CVD risk status
Interaction term	0.99	0.90 to 1.1
SK (low vs middle)	0.95	0.61 to 1.5
SK (high vs middle)	1.4	0.93 to 2.2
SK × history of renal disease
Interaction term	0.78	0.29 to 2.1
SK (low vs middle)	0.93	0.59 to1.5
SK (high vs middle)	1.6	1.04 to 2.4

^*Controlling for age, gender, race, blood pressure, cholesterol, diuretic use, renal function, cardiovascular (CVD) risk status and history of diabetes, and history of renal disease. SK indicates serum potassium.