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目的:了解杭州市城区食盐销售场所及周边人群碘缺乏病（IDD）相关知识、态度和行为（知信行）现状，为制定有效的健康教育与健康促进模式提供科学依据。方法:2018年在杭州城区按照东、西、南、北、中方位划分5个调查区域，每个调查区域抽取1个食盐销售场所为调查点，对调查点及周边人群开展IDD知信行面对面问卷调查。调查内容包括基本情况、对碘缺乏危害的认知、获取IDD防治知识的途径、对预防IDD方法的认知和对食盐加碘及非碘盐的态度，并对调查结果进行分析。结果:共对991人开展IDD知信行有效调查，其中有80.8%（801/991）认为缺碘会导致地方性甲状腺肿大，有41.7%（413/991）认为缺碘可引起不同程度智力损害；有62.1%（615/991）从电视、广播、网络、报纸等途径获取IDD防治知识；有76.8%（761/991）认为食用碘盐是预防IDD的最佳方法，有8.9%（88/991）认为食用海鲜是预防IDD的最佳方法；有50.9%（504/991）认为食用碘盐不会导致碘过量，但有56.5%（560/991）认为食用碘盐与患甲状腺结节等有关；有56.2%（557/991）认为应该开放非碘盐供应。结论:杭州市城区食盐销售场所及周边食盐覆盖人群IDD防治知晓率偏低，对食盐加碘的认识存在偏差，获得防治知识途径较少，应在食盐销售环节加强主动宣教。“,”Objective:To understand the iodine deficiency disorders (IDD) knowledge, attitude and practice (KAP) among population in and near salts marketing areas of Hangzhou urban areas, so as to provide the evidence for making effective health education and health promotion models.Methods:A face to face KAP questionnaire investigation was conducted in 5 salts marketing survey points of 5 urban areas according to the north, south, east, west and center locations in 2018. The survey included basic information, awareness of the harm of iodine deficiency disorders (IDD), ways to acquire knowledge of IDD prevention and control, knowledge of IDD prevention, and attitudes towards iodized salt and iodine-free salt. The survey results were analyzed.Results:Totally 991 people completed the investigation; and 80.8% (801/991) of the population surveyed knew that iodine deficiency will cause endemic goiter, and 41.7% (413/991) of them knew that IDD could lead to varying degrees of mental impairment; 62.1% (615/991) obtained IDD prevention knowledge from TV, radio, Internet and newspaper; 76.8% (761/991) knew that IDD can be prevented by taking iodized salt. However, 8.9% (88/991) thought eating seafood was the best way to prevent IDD; 50.9% (504/991) thought iodized salt may not cause excessive iodine intake, but 56.5% (560/991) considered that there was a correlation between iodized salt and thyroid nodules. 56.2% (557/991) believed that the supply of iodized salt should be opened.Conclusions:The population in and near salts marketing areas of Hangzhou urban areas remains relatively lack of knowledge on IDD and salt iodization. The routes people obtaining IDD knowledge are very limited and the health education should be highlighted.