Analysis of iodine nutritional status of high-risk population in coastal salt-producing areas and coastal nonsalt-producing areas in Xiamen city of Fujian province / 中国地方病学杂志

ABSTRACT

Objective To assess the iodine nutritional status of special target population in coastal saltproducing areas and coastal non-salt-producing areas in Xiamen city,and to provide a basis for take appropriate measures for prevention of iodine deficiency disorders.Methods The Xiang-An salt-producing areas and the JiMei non-salt-producing areas were chosen as research spots in 2009.One sample of produced water and 2 samples of tap water were collected to test iodine level; 600 children aged 8 to 10 were selected and thyroid palpation was performed,besides,the urine sample and household salt sample were also collected for iodine determination.Sixty pregnant women,breasffeeding women,and 0 - 2 year old infants were recruited,respectively,and urine samples and household salt samples were collected to perform the determination of iodine level.Results The iodine levels in drinking water of Xiang-An district and Ji-Mei district were 3.23 and 6.05 mg/L,respectively.The consumption rates of edible qualified iodinated salt were 84.4％ (438/519) and 98.3％ (392/399),respectively.The goiter rates of children aged 8 - 10 were 3.03％(19/628) and 0.67％(4/600),respectively.The medians of urinary iodine were 202.80 and 238.40 μg/L,respectively.The proportions of urinary iodine level ＜ 50 μg/L were 3.5％ (14/405) and 1.0％(2/202),respectively.The medians of urinary iodine of the pregnant women were 120.55 and 153.35 μg/L,respectively,and the proportions of urinary iodine level ＜ 150 μg/L were 62.1％ (46/74) and 46.8％ (29/62),respectively.The medians of urinary iodine in three trimester were 173.10,144.75 and 101.90 μg/L,respectively,early trimester of pregnancy ＞ second trimester and third trimester (Z =6.151,3.052,all P ＜ 0.05),second trimester ＞ third trimester (Z =2.016,P ＜ 0.05 ).The medians of urinary iodine of the breastfeeding women were 131.20 and 104.35 μg/L,respectively.The proportions of urinary iodine level ＜ 100 μg/L were 35.3％ (24/68) and 46.7％(28/60),respectively.The medians of urinary iodine of the infants were 81.95 and 80.20 μg/L,respectively,the proportions of urinary iodine level ＜ 100 μg/L were 59.7％(37/62) and 61.6％(40/65),respectively,＜ 50 μg/L were 32.3％ (20/62) and 30.8％ (20/65),respectively.Conclusions The levels of iodine nutrition in pregnant women,breastfeeding women,and 0 - 2 year old infants from Xiang-An district and Ji-Mei district in Xiamen city are still below the desired level of iodine nutrition,and the infants and pregnant women in coastal salt-producing areas are poor in iodine nutrition,we should pay close attention.We should strengthen market supervision on iodized salt,carried out iodine nutrition monitoring on pregnant women,breasffeeding women,and infants,and disseminate knowledge of iodine nutrition among high-risk population should be carried out immediately.