Abstract：Objective To investigate the iodine intake from salt and the iodine nutrition level in pregnant women in Tianjin and to analyze the relationship between salt iodine and their iodine nutritional status so as to provide a basis for scientific supplementation of iodine in pregnant women. Methods A stratified random sampling method was used to select pregnant women in the first (≤12 weeks), second (13-28 weeks) and third trimester (29-40 weeks) of pregnancy in Tianjin from 2013 to 2014, with about 30 pregnant women for each trimester, each county or district. Urine samples of 25 ml were collected from 545 pregnant women (including 173, 203 and 169 in the first, second and third trimester of pregnancy respectively) from 6 counties or districts for determination of urine iodine. Household salt samples were collected for salt iodine determination, and salt intake per capita was measured by 3-day weighing method. Results The household coverage rate of iodized salt in the pregnant women was 85.29%. The median of salt iodine was 24.3 mg/kg (interquartile range 21.8-26.9 mg/kg). The average per capita intake of salt was (10.34± 5.32) g/d. The daily salt intake was not significantly different among pregnant women in different pregnancy stages (F=1.022, P=0.360) or from different counties or districts (F=0.692, P=0.630). The median of iodine intake from salt in the pregnant women was 187.11 μg/d g (interquartile range 119.73-267.17μg/d). Statistically significant difference in the amount of salt iodine intake was not found among pregnant women in different pregnancy stages (H=1.640, P=0.440), but was found among pregnant women from various counties or districts (H=13.667, P=0.018). The median of urinary iodine of the pregnant women was 127.20 μg/L (interquartile range 82.44-184.95μg/L). No statistically significant difference was observed in urinary iodine among pregnant women in different pregnancy stages (H=3.264, P=0.196) or from different counties or districts (H=3.599, P=0.609). 62.57% of the pregnant women sufferred from iodine deficiency, 24.59% remained adequate iodine nutrition, 11.01% took iodine more than appropriate amount, and 1.83% took excessive amount of iodine. Conclusions The iodine nutrition of the pregnant women in Tianjin stays in the status of iodine deficiency, and the salt iodine concentration is slightly unadequate for iodine nutrition of the pregnant women.
刘忠慧, 王洋, 崔玉山, 符刚, 侯常春. 2013年10月-2014年8月天津市孕妇食盐摄碘量及碘营养水平调查[J]. 实用预防医学, 2016, 23(12): 1436-1439.
LIU Zhong-hui, WANG Yang, CUI Yu-shan, FU Gang, HOU Chang-chun. Survey on iodine intake from salt and iodine nutrition in pregnant women in Tianjin during December,2013 and August, 2014. , 2016, 23(12): 1436-1439.
2016, Vol. 23 
