Table 3.

Associations of 24-hr urinary sodium, potassium, and sodium to potassium ratio with body mass index, body fat, and percent body fat, SOLNAS (N=435).

	Body Mass Index (kg/m2)		Body Fat (kg)		Percent Body Fat
	Beta	95% CI	Beta	95% CI	Beta	95% CI
Sodium
Model 1	0.46*	0.26, 0.66	0.83*	0.41, 1.25	0.40*	0.16, 0.64
Model 2	0.27*	0.08, 0.45	0.54*	0.15, 0.93	0.35*	0.11, 0.58
Sodium density
Model 1	0.11	−0.14, 0.37	0.33	−0.18, 0.84	0.37*	0.06, 0.68
Model 2	0.12	−0.13, 0.37	0.37	−0.11, 0.86	0.39*	0.09, 0.68
Potassium
Model 1	0.56*	0.11, 1.02	0.93*	0.04, 1.82	0.37	−0.09, 0.83
Model 2	0.22	−0.17, 0.60	0.41	−0.37, 1.20	0.26	−0.20, 0.73
Potassium density
Model 1	−0.32	−0.80, 0.16	−0.49	−1.35, 0.37	0.10	−0.39, 0.58
Model 2	−0.39	−0.88, 0.10	−0.55	−1.44, 0.34	0.07	−0.44, 0.59
Sodium: Potassium
Model 1	0.25*	0.04, 0.45	0.51*	0.07, 0.94	0.34*	0.10, 0.59
Model 2	0.23*	0.04, 0.41	0.48*	0.10, 0.86	0.34*	0.12, 0.57

Model 1 is adjusted for age, sex, heritage, education, income, language preference, nativity/years in the US, study site, and missing 1 urine void; Model 2 is additionally adjusted for smoking, hypertension, diabetes, alcohol use, depression, physical activity (total METs/week), and energy intake (in sodium and potassium models only)

We modeled 500 mg increments of sodium and potassium, 250 mg per 1000 kcal unit increments for sodium density and potassium density, and 0.50 unit increments of sodium to potassium ratio (mmol/mmol)

^*Indicates estimate is statistically significant, p<0.05