Objective: The prevalence of malnutrition in the community-dwelling older population of China was analyzed by Meta-analysis. Methods: Papers on the nutrition of community-dwelling elderly (≥60 years old) in China from August 1, 2011, to July 31, 2021, were retrieved through PubMed, Embase, the Cochrane Library, Web of Science, Wanfang Digital Database and China National Knowledge Infrastructure Database. Malnutrition was defined by nutritional assessment and screening tools of different studies. The random-effect model was fitted to calculate the prevalence. Subgroup analysis and inter-group difference analysis were performed according to the data included in the paper. Results: A total of 13 articles met the inclusion criteria, including 19 938 participants ≥60 years old. There are a total of seven methods for diagnosing criteria and defining malnutrition. The prevalence of malnutrition reported in papers varies greatly (2.4%-52.5%), of which seven pieces reported the prevalence of malnutrition risk (21.3%-67.0%). The Meta-analysis shows that the combined prevalence of malnutrition and risk of malnutrition was 41.2% (95%CI: 29.5%-54.0%, I2=99.6%, P<0.05) in the community-dwelling older population of China. The prevalence after 2017 is lower than that before 2017 (29.6% vs. 66.6%, χ2=274.20, P<0.05). The prevalence of men was lower than that of women (44.9% vs. 52.2%, χ2=10.67, P=0.001). The prevalence of non-living alone is lower than that of the older population living alone (41.2% vs. 49.6%, χ2=14.23, P<0.05). Conclusion: Malnutrition is common among the community-based older people in China. The prevalence of malnutrition is higher among older women and the elderly who live alone.

目的 探讨河南省濮阳市COVID-19病例的流行病学特征,为疾病防控提供依据.方法 收集濮阳市17例COVID-19确诊病例的流行病学资料,通过绘制发病时序图、病例关系图描述和分析其时间、地点及人群分布特征.结果 17例确诊病例中,男性7例(41.2％).年龄在12～ 66岁之间,中位数36岁.共发生4起聚集性疫情,涉及病例12例(70.6％),均涉及家庭续发病例.中位潜伏期为6.5d,最短3d,最长13d.其中,1例二代病例的发病时间比指示病例早11d.发病-就诊间隔的中位时间为4d,最短0d,最长12 d.17例病例中,有6例14d内有湖北旅居史,1例有境外旅游史.其余病例均为本地感染者,其中8例为确诊病例的密切接触者,2例传染来源不明.密切接触者中,家庭聚集性病例的传染途径包括密切接触传播和呼吸道传播.小区续发病例的传播途径推断为楼梯间飞沫传播.结论 濮阳市以家庭聚集性疫情为主,且指示病例大部分为湖北传入性病例,潜伏期病例存在传染可能.