Table 3.

Multivariable robust linear regression for systolic BP and diastolic BP

Independent Variable	Change (95% CI)	P Value
Systolic BP
urine [Na+]/[K+]a	1.16 (0.62, 1.70)	<0.001
ageb	2.33 (2.06, 2.60)	<0.001
male sex	8.10 (6.90, 9.30)	<0.001
African-American race	7.37 (6.36, 8.39)	<0.001
diabetes mellitus	4.27 (2.64, 5.90)	<0.001
smoker status	1.01 (0.01, 2.01)	0.05
body mass index (kg/m2)b	2.81 (2.43, 3.18)	<0.001
total cholesterol (mg/dl)b	0.13 (0.07, 0.19)	<0.001
GFR (ml/min per 1.73 m2)b	0.10 (0.05, 0.20)	0.04
UACR (mg/g)b	0.21 (0.18, 0.25)	<0.001
Diastolic BP
urine [Na+]/[K+]a	0.84 (0.50, 1.18)	<0.001
ageb	0.89 (0.72, 1.06)	<0.001
male sex	2.96 (2.20, 3.72)	<0.001
African-American race	4.12 (3.48, 4.76)	<0.001
diabetes mellitus	1.07 (0.06, 2.09)	0.04
smoker status	0.66 (0.03, 1.29)	0.04
body mass index (kg/m2)b	1.59 (1.36, 1.83)	<0.001
total cholesterol (mg/dl)b	0.12 (0.08, 0.16)	<0.001
GFR (ml/min per 1.73 m2)b	0.04 (−0.02, 0.10)	0.19
UACR (mg/g)b	0.02 (0.01, 0.03)	0.001

95% CI, 95% confidence interval; U[Na⁺]/[K⁺], urinary sodium/potassium ratio; UACR, urine albumin/creatinine ratio.

^aPer 3-unit increase.

^bPer 5-unit increase.