Table 2.

Relationship between age, sex, blood pressure, body mass index, and sodium excretion

Item	Cases	Sodium excretion (g)
Age (years old)
30–40	384	10.3 ± 2.4
40–50	689	10.7 ± 2.5
50–60	620	11.2 ± 2.7
60–70	482	11.3 ± 2.9
≥70	281	11.3 ± 3.1
P a		<0.001
Sex
Male	914	11.0 ± 2.7
Female	1542	10.9 ± 2.7
P		0.73
SBP (mmHg)
Q1 80–112	546	10.4 ± 2.3
Q2 113–126	670	10.5 ± 2.4
Q3 127–142	568	11.2 ± 2.7
Q4 143–230	672	11.7 ± 3.1
P a		<0.001
DBP (mmHg)
Q1 50–69	484	10.3 ± 2.5
Q2 70–77	597	10.6 ± 2.5
Q3 78–85	686	11.0 ± 2.6
Q4 86–124	689	11.7 ± 3.0
P a		<0.001
BMI (kg · m−2)
15.7–21.3	614	10.2 ± 2.5
15.8–23.4	611	10.7 ± 2.6
23.5–25.6	617	11.2 ± 2.6
25.7–39.6	614	11.8 ± 2.9
P a		<0.001
Triglyceride (mmol L−1)
< 1.7	2169	10.9 ± 2.7
≥ 1.7	287	11.1 ± 2.9
P		0.53
Total cholesterol (mmol · L−1)
< 5.2	1565	10.9 ± 2.6
≥ 5.2	891	11.1 ± 2.9
P		0.02
LDL-cholesterol (mmol · L−1)
< 3.4	1981	10.9 ± 2.6
≥ 3.4	475	11.3 ± 3.0
P		<0.001
Serum glucose (mmol · L−1)
< 6.0	2156	10.9 ± 2.7
≥ 6.0	300	11.0 ± 2.9
P		0.88

^aTrend analysis