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Table 1 Compilation of Japanese diet studies measuring iodine in 24-hour diet samples and single meals

From: Assessment of Japanese iodine intake based on seaweed consumption in Japan: A literature-based analysis

Author(s) [source] Year Number of Participants Mean Iodine in 24-Hour Diet Sample ( μg) Lowest Iodine in 24-Hour Diet Sample ( μg) Highest Iodine in 24-Hour Diet Sample ( μg) City/Region
Katamine et al. [23] 1986 1 1023 μg 45 μg 1921 μg Tokyo
Katamine et al. [23] 1986 1 362 μg 57 μg 1244 μg Tokyo
Katamine et al. [23] 1986 1 361 μg 62 μg 1098 μg Tokyo
Katamine et al. [23] 1986 1 429 μg 52 μg 1561 μg Tokyo
Katamine et al. [23] 1986 10 (hospital) 1290 μg 89 μg 4746 μg  
Katamine et al. [23] 1986 5 (hospital) 195 μg 95 μg 287 μg  
Katamine et al. [23] 1986 13 (school) 113 μg/meal 47 μg/meal 203 μg/meal Ibaraki
Katamine et al. [23] 1986 5 (school) 27 μg/meal 25 μg/meal 31 μg/meal Kanagawa
Katamine et al. [23] 1986 5 (school) 36 μg/meal 18 μg/meal 43 μg/meal Kanagawa
Tajiri et al. [48] 1986 1 25400 μg est.    Kumamoto
Tajiri et al. [48] 1986 1 43000 μg est.    Kumamoto
Tajiri et al. [48] 1986 1 15000 μg est.    Kumamoto
Tajiri et al. [48] 1986 1 20000 μg est.    Kumamoto
Tajiri et al. [48] 1986 10 2800 μg est.    Kumamoto
Tajiri et al. [48] 1986 8 2300 μg est.    Kumamoto
Shiraishi et al. [61] 1999 6 1770 μg 545 μg 4490 μg Mito
Kunachowicz et al. [62] 2000 5 1970 μg/kg mean, 550 μg/kg median 88 μg/kg 7650 μg/kg  
Yoshinaga et al. [25] 2001 29 (476 meals) 1900 μg/kg    All Japan
Kucera et al. [63] 2003   756 μg/kg median 124 μg/kg 21660 μg/kg  
Nishiyama et al. [16] 2004 5 (pregnant)   2280 μg 3180 μg Kumamoto
Nishiyama et al. [16] 2004 10 (pregnant)   820 μg 1400 μg Kumamoto
Nishiyama et al. [16] 2004 22 (pregnant w/no kelp)   250 μg 480 μg Kumamoto