ABSTRACT
Objective The objective of this study was to analyze the related factors that influencing the level of urinary iodine (UI).Methods 994 adult cases were selected from medical centers.Morning urine was collected and questionnaire including age,sex,family medical history of thyroid disease administered.Information on previous 24-hour consumption of iodine-containing foods was collected.Data was analyzed by Empower(R) software with logistic model.Results The median UI level was 193.0 μg/L.After adjusting for potential confounders,gender (P=0.000),family monthly income per capita (P=0.000),the amount of iodized salt intake (P =0.041),and eating kelps (P=0.000) appeared to be associated with the level of UI.Risk regarding the prevalence of excess UI (＞ 300 μg/L) increased with the increasing amount of salt and kelp consumption:salt consumption ＞165 g/m (OR=24.3,95％CI:1.1-523.8,P＜0.05) ; kelp consumption (OR=9.6,95％CI:2.6-35.1,P＜0.001).Conclusion UI was associated with factors as:gender,family monthly income per capita,intake of iodized salt and the amount of kelp consumption.Excessive intake of iodine might be associated with high intake of iodized salt and kelp.