Adequacy of iodine intake in three different Japanese adult dietary patterns: a nationwide study

Nutrition Journal

Table 4 Median of iodine intake and excretion across three dietary patterns identified by cluster analysis (n = 195, Japanese women)^a

	All			Cluster I (Rice and vegetables)			Cluster II (Fish and Japanese noodles)			Cluster III (Bread and non-Japanese noodles)			p-value†
	n	Median	IQR	n	Median	IQR	n	Median	IQR	n	Median	IQR
Total energy intake (kcal/d)	195	1847	1654, 2097	22	1828	1719, 1943	33	1913	1665, 2096	140	1845	1634, 2124	0.62
Crude iodine intake (μg/d)	195	462	155, 2034	22	2376	204, 4070	33	1559	341, 5952	140	310	138, 1046	0.0002
Habitual iodine intake (μg/d)	195	511	282, 1080	22	1160	353, 4602	33	1400	852, 1829	140	374	247, 701	-
Iodine excretion (μg/d)	177	345	177, 978	21	581	405, 1481	28	472	241, 1374	128	306	171, 808	0.006
Iodine excretion (μg/gCre/d)	177	367	179, 931	21	741	393, 1409	28	486	302, 1220	128	311	166, 590	0.003

IQR interquartile range
^aIodine intake was assessed with 4-day dietary records and iodine excretion by 24-h urine collection. Habitual iodine intake was calculated using the Best-Power method
† The Kruskal-Wallis test was used to test the median differences among clusters

ISSN: 1475-2891