[Analysis of the prevalence and its influencing factors of diffuse goiter in Zhejiang].

Objective: To evaluate the status of diffuse goiter of population in Zhejiang Province and to analyze the relevant influencing factors.

Methods: A total of 18 188 subjects were recruited in the cross sectional survey, by multistage stratified cluster random sampling method. B ultrasound measurement were carried among the subjects to detect the thyroid volume, and the basic information and life styles were interviewed by questionnaires.

[Study on level of dietary iodine intake and its contribution rate of residents in Zhejiang].

Objective: To assess the level of dietary iodine intake and its contribution in Zhejiang.

Methods: A total of 9798 subjects were recruited in this survey with multi-stage stratified cluster random sampling method in April, 2010, the 24-hours dietary recall method and the "food composition table" were used to obtain the dietary iodine intake, and edible salt and drinking water samples were collected to detect the content of iodine.

Results: A total of 9798 subjects were included in this survey.

[A cross-sectional study on iodine nutrition in general population from Zhejiang province, China].

Objective: To understand the current status of iodine nutrition among the community residents to compare the level of iodine nutrition in different areas and groups of populations in Zhejiang province.

Methods: Stratified cluster sampling method was adopted and residents from twenty-two communities in Zhejiang province were selected. A cross-sectional survey was conducted, using questionnaires, laboratory tests, on urinary iodine, water iodine and the concentration of the iodine in salt, which had played positive roles in the calculation of the level of iodine nutrition.

[Analysis of urine iodine level and its influencing factors in Zhejiang from 2009 to 2011].

Objective: To evaluate the iodine nutrition level of population in Zhejiang province and to analyze the relevant influencing factors from 2009 to 2011.

Methods: From October 2009 to October 2011, a total of 19 517 subjects were recruited in this cross sectional survey, by multistage stratified cluster random sampling method. The subjects were all living over three years in Zhejiang province.