Objective Based on the Global Burden of Disease (GBD) 2021 database, to analyze the dynamic trends and regional differences in the burden of disease of premenstrual syndrome (PMS) among women of childbearing age globally from 1990 to 2021, and to provide an evidence-based basis for optimizing the allocation of reproductive health resources. Methods Data on the prevalence, incidence and disability-adjusted life years (DALYs) of PMS in 204 countries and regions in the GBD 2021 database were extracted and combined with sociodemographic indices (SDI) to assess the temporal trends and spatial distribution characteristics of the burden of disease using the annual average percentage change (AAPC). Results The global prevalence, incidence and DALYs of PMS in women of reproductive age in 2021 were 45 666.32/100 000, 11 935.05/100 000 and 381.11/100 000, respectively. From 1990 to 2021, the prevalence (AAPC=0.05%) and DALYs (AAPC=0.05%) showed a slight upward trend and a slight decrease in prevalence (AAPC=−0.06%). Prevalence and DALYs increased at a higher rate in low SDI regions (AAPC=0.13% to 0.26%), and the fastest rate of increase was seen in high-income North America in high-SDI regions (AAPC=0.50% to 0.52%). Conclusion The PMS disease burden is unevenly distributed globally and is influenced by a variety of factors, including the level of social development. In the future, it is necessary to combine multidisciplinary intervention strategies and incorporate prospective data to improve prediction models to support the development of global female reproductive health policies.
目的 探讨管石复位法（Epley法）和嵴顶耳石解脱法（Semont法）两种手法复位治疗后半规管良性阵发性位置性眩晕（BPPV）患者的疗效。 方法 收集2009年9月－2011年1月就诊的后半规管BPPV患者60例，依据随机数字表法平均分配到两个治疗组，分别采用Epley法和Semont法进行治疗，观察患者眩晕改善情况，并随访3～12个月。 结果 两种方法的治愈有效率在治疗后1、2、3周，3个月时差异无统计学意义（P＞0.05）。所有患者随访3～12 个月，均无复发，治疗后均无不良反应。 结论 两种方法治愈有效率相近。治疗时可先选用Epley法，疗效不佳，再选择Semont法。