Table 2.

Sodium (Salt) and Potassium Intake (grams/day) in South Korea, 1998, 2005 and 2009

Demographic group	Sodium (Salt) intake, g/d/capita				Potassium intake, g/d/capita
	1998	2005	2009	P value1	1998	2005	2009	P value2
Age groups
2-6 y	2.3 ( 5.8)	2.3 (5.8)	2.0 (5.0)	<0.01	1.6	1.7	1.7	0.2769
7-12 y	3.6 ( 9.0)	3.6 (9.0)	3.3 (8.3)	0.1323	2.3	2.3	2.3	0.4215
13-18 y	4.2 (10.5)	4.2 (10.5)	4.1 (10.3)	0.3492	2.4	2.4	2.5	0.184
19-39 y	5.2 (13.0)	4.8 (12.0)	5.2 (13.0)	0.6875	2.9	2.6	3.1	<0.01
40-59 y	5.1 (12.8)	5.0 (12.5)	5.3 (13.3)	<0.05	2.8	2.8	3.2	<0.001
60 y+	4.2 (10.5)	4.5 (11.3)	4.1 (10.3)	0.3132	2.3	2.5	2.6	<0.01
Gender
Male	5.1 (12.8)	4.9 (12.3)	5.5 (13.8)	<0.001	2.8	2.7	3.2	<0.001
Female	4.1 (10.3)	4.1 (10.3)	3.9 (9.8)	<0.01	2.4	2.4	2.5	<0.01
Adults (≥19 y) education
<High school diploma	4.6 (11.5)	4.6 (11.5)	4.6 (11.5)	0.5776	2.4	2.5	2.7	<0.001
≥High school diploma	5.1 (12.8)	4.9 (12.3)	5.3 (13.3)	0.1356	2.9	2.7	3.2	<0.001
Income as percentage of poverty (%)3
Low (<120%)	4.4 (11.0)	4.4 (11.0)	4.2 (10.5)	<0.05	2.4	2.5	2.5	<0.05
Middle (120-   250%)	4.5 (11.3)	4.5 (11.3)	4.8 (12.0)	<0.05	2.6	2.6	2.9	<0.001
High (≥250%)	4.7 (11.8)	4.8 (12.0)	4.9 (12.3)	0.0878	2.9	2.9	3.1	<0.01
Region
Large City	4.5 (11.3)	4.5 (11.3)	4.7 (11.8)	<0.05	2.6	2.6	3.1	<0.001
Small City	4.6 (11.5)	4.7 (11.8)	4.6 (11.5)	0.6698	2.6	2.5	3	<0.001
Rural	4.5 (11.3)	4.5 (11.3)	4.8 (12.0)	0.062	2.5	2.6	2.8	<0.001
Total	4.6 (11.5)	4.5 (11.3)	4.7 (11.8)	0.0887	2.6	2.6	2.9	<0.001

¹Student t-test comparing mean per capita sodium intake between 1998 and 2009.

²Student t-test comparing mean per capita potassium intake between 1998 and 2009.

³Calculated values based on poverty threshold of each year.