Survey on Iodine Nutrition Status of Key Population in Dalian, China

Objective To investigate the iodine nutrition status of key population in Dalian after adjusting the concentration of iodized salt to 35 mg/kg±15 mg/kg. Methods Pregnant, breast feeding and childbearing women, infants and children were selected to detect the iodine content of urine. The iodine in the salt, drinking water and goiter rate were detected in urban and rural area. Results The mean salt iodine was 25.80 mg/kg and 30.52 mg/kg, the mean water iodine was 3.3 μg/L and 6.1 μg/L, and goiter rate was 13.0% and 7.7% respectively in urban and rural areas. The urine iodine (median) of pregnant, breast feeding and childbearing women, infants, school children was 168.60, 129.45, 179.80, 132.50 and 195.80 (μg/L) respectively in urban area, and was 162.00, 172.40, 156.90, 258.95 and 326.00 (μg/L) in rural area. ConclusionsThe iodine nutrition may meet the demand of population at the level of salt iodine (20-30 mg/kg). It's difficult to reach adequate iodine nutrition at one concentration of salt iodine for all key population. It's suggested that iodine nutrition surveillance of pregnant and breast feeding women should be strengthen, adjusting the concentration standard of salt iodine for all target population.