Table 9. Dietary intake of iron and other major nutrient by age group in men and women for NIPPON DATA80.

Age (years)	30–39		40–49		50–59		60–69		70–		Trend P	P diff
Variable	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Men (n)	1220		1196		1019		679		471
Iron (mg/1000 kcal)	6.0	1.1	6.1	1.1	6.3	1.1	6.8	1.3	6.7	1.3	<0.001	<0.001
Iron (mg/day)	14.9	3.9	15.2	3.8	15.8	3.9	15.4	4.0	13.2	3.5	0.003	<0.001
Carbohydrate (%kcal)	57.8	5.8	58.6	5.8	59.7	6.2	62.0	6.5	64.5	6.7	<0.001	<0.001
Protein (%kcal)	14.7	2.1	15.0	2.0	15.3	2.2	15.3	2.1	15.1	2.2	<0.001	<0.001
Total fat (%kcal)	22.1	5.1	20.4	4.7	19.4	5.0	18.3	5.0	17.2	4.9	<0.001	<0.001
Total energy (kcal)	2475.2	486.0	2476.2	450.0	2487.7	484.2	2297.8	541.4	1981.5	406.4	<0.001	<0.001
Women (n)	1583		1469		1319		900		566
Iron (mg/1000 kcal)	6.5	1.1	6.9	1.2	7.4	1.4	7.3	1.4	7.4	1.4	<0.001	<0.001
Iron (mg/day)	12.8	3.0	13.9	3.6	14.5	3.7	13.2	3.8	12.1	3.2	<0.001	<0.001
Carbohydrate (%kcal)	59.2	5.8	60.9	6.2	62.6	6.5	65.5	6.8	66.4	7.0	<0.001	<0.001
Protein (%kcal)	15.1	1.9	15.3	2.1	15.7	2.3	15.7	2.2	15.7	2.3	<0.001	<0.001
Total fat (%kcal)	23.9	5.4	22.8	5.6	21.2	5.4	18.8	5.4	18.5	5.2	<0.001	<0.001
Total energy (kcal)	1957.0	338.5	2025.5	400.6	1984.9	420.4	1825.4	412.8	1639.2	341.7	<0.001	<0.001

Values are in mean and standard deviation. Trend P obtained by contrast statement of analysis of variance. P diff values obtained by ANOVA statistics.