Survey on iodine nutrient in vulnerable population in Linxia Hui Autonomous Prefecture of Gansu in 2006 / 中国地方病学杂志

ABSTRACT

Objective To assess iodine nutrient levels of vulnerable population in Linxia Hui Autonomous Prefecture of Gansu. Methods Local pregnant, lactation, child-bearing age women and 0 - 3 years old infants were selected. The urinary iodine (UI) were determined by arsenic-Ce catalytic spectrophotometry (WS/T 107-1999) and salt iodine content was determined using direct titration method (GB/T 13025.7-1999). The development quotient (DQ) among 0 - 3 years old infants were surveyed by the scales of neuropsychologists development among 0 - 6 years old, and their body height and weight were then investigated. Results The consumption and coverage rates of iodized salt at household level were all below than 90% in 5 counties among 8 counties. The median urine iodine (MUI) among pregnant, lactation, child-beating age women and 0 - 3 years old infants were 90.17, 89.28, 84.85 and 107.28 μg/L, respectively. The UI proportion less than 50 μg/L were 29.6%(278/938), 30.7%(239/778), 32.2% (265/824), and 23.9%(252/1056), respectively. The UI proportion equal or more than 50 μg/L and less than 100 μg/L were 25.1%(235/938), 24.0%(187/778), 23.7%(195/824), 23.7%(250/1056). MUI in pregnant were all less than 150 μg/L in 8 counties, and MUI in lactation women were less than 100 μg/L in 6 counties. The DQ median of infants 0 - 3 years old was 93.0, and 59.9%(395/659), 34.4%(227/659) and 5.6%(37/659)had a DQ below middle, at middle and above middle, respectively. Forty point seven percent (266/654), 50.2%(328/654) and 9.1% (60/654) had a body height below middle,at middle and above middle, respectively. Thirty-five percent (232/663), 51.3%(340/663) and 13.7%(91/663) had a body weight below middle, at middle and above middle, respectively. Conclusions The local qualified iodized salt consumption rate and iodized salt coverage rate are still low. The urine iodine level is below than the reference value recommended. The iodine nutrient is not enough among iodine deficiency disorder vulnerable population, especially in pregnant and lactation women. Infants growth development is retarded.