Conclusion the prevalence of malocclusion among juveniles in the area of Shanghai was obviously higher than the results of investigation carried out in 1961 which was 29.33%.
结论上海地区少年儿童的错患病率比1961年调查所得结果29.33%错患病率明显升高。
Epidemiological investigation; anxiety disorders; prevalence; risk factor.
流行病学调查；焦虑障碍；患病率；危险因素。
Further investigation is necessary to determine the prevalence of oseltamivir-resistant H5N1 viruses among patients treated with this drug.
进一步的调查是必要的，以确定奥司他韦抗h5n 1病毒的患者用此药治疗的患病率。
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