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目的了解天津市高校大学生碘营养水平,分析其影响因素。方法采用随机抽样调查方式,于2010年10月至2011年5月在天津市5所大学收取学生晨尿样本共计296份,每校采集饮用水供水点水样品3份,共计15份,每校采集食堂盐样品2份,共计10份。采用过硫酸铵消化砷铈催化分光光度方法测定尿碘及水碘,直接滴定法测定盐碘。同时向调查对象现场发放碘营养状况调查问卷,分析碘营养影响因素。结果 296份尿液样品尿碘中位数为211.20μg/L;医学专业学生尿碘水平(263.86μg/L)高于非医学专业学生(166.61μg/L),差别有统计学意义(P<0.05);对碘营养知识较了解者尿碘水平较不了解者有增高趋势;吸烟者、素食者、饮酒者尿碘水平较不吸烟者、非素食者、日常饮水或饮茶者有降低趋势,但无统计学差别。此外,性别及日常饮水等因素对尿碘水平影响不明显。所采集15份水样碘含量在7.60～10.67μg/L之间,平均8.39μg/L。10份盐样中4份为非碘盐,其余均合格。结论本次调查的高校大学生碘营养水平处于充足和可接受水平。大学生碘营养水平受生活习惯及专业知识等因素影响。
Objective To understand the iodine nutrition of university students in Tianjin and analyze the influencing factors. Methods A total of 296 samples of morning urine were collected from 5 universities in Tianjin from October 2010 to May 2011. Each school collected 3 samples of drinking water supply points for a total of 15 samples, Collect canteens salt samples 2, a total of 10 copies. Ammonium persulfate digestion arsenic cerium catalytic spectrophotometric determination of urinary iodine and iodine, direct titration salt iodine. At the same time, questionnaires of iodine nutrition status were distributed to the surveyed site, and the influencing factors of iodine nutrition were analyzed. Results The urinary iodine median of 296 urine samples was 211.20μg / L, and the urinary iodine level of medical students was higher than that of non-medical students (166.61μg / L, 263.86μg / L) (P < 0.05). Knowledge of iodine nutrition was better than that of those who did not understand the level of urinary iodine. There was a tendency of lower urinary iodine in smokers, vegetarians and drinkers than in non-smokers, non-vegetarians, daily drinking or tea drinkers , But no statistical difference. In addition, gender and daily drinking water and other factors on the level of urinary iodine is not obvious. The iodine content of 15 samples collected was 7.60 ~ 10.67μg / L with an average of 8.39μg / L. Four of the 10 salt samples were non-iodized salt, and the rest were qualified. Conclusion The iodine nutrition of college students in this survey is at a sufficient and acceptable level. College students iodine nutrition by living habits and professional knowledge and other factors.