TABLE 3.

Random-effects models of urinary sodium excretion (mg/24 h) as a function of study year and study participant characteristics¹

	Univariate model	P value	Multivariate model2	P value
Study year (10-y increments)	146 (−44, 337)	0.13	154 (−140, 448)	0.29
Mean age of study participants ≥50 y	−61 (−495, 372)	0.78	248 (−239, 736)	0.30
Male sex3	879 (132, 1626)	0.02	1281 (89, 2473)	0.04
Black or African American race4	−415 (−1223, 393)	0.30	234 (−781, 1250)	0.63

¹All values are coefficients; 95% CIs in parentheses.

²Covariates were study year, mean age of study participants (< or ≥50 y), sex (percentage of study participants who are men), and race (percentage of study participants who are black or African American).

³Percentage of men (continuous variable; 1-unit increase in coefficient = 100%).

⁴Percentage of blacks or African Americans (continuous variable; 1-unit increase in coefficient = 100%).