文章摘要
张文婷,刘丹,谢朝军,申动,陈宗遒,李志浩,刘远,张希如,陈沛良,钟文芳,杨佩,黄清湄,罗雷,毛琛.广州市新型冠状病毒肺炎病例密切接触者核酸检测灵敏度和特异度分析[J].中华流行病学杂志,,():
广州市新型冠状病毒肺炎病例密切接触者核酸检测灵敏度和特异度分析
Sensitivity and specificity of nucleic acid testing in close contacts of COVID-19 cases in Guangzhou
收稿日期:2020-12-11  出版日期:2021-03-25
DOI:10.3760/cma.j.cn112338-20201211-01400
中文关键词: 新型冠状病毒肺炎;核酸检测;诊断;灵敏度;特异度
英文关键词: COVID-19;Nucleic acid testing;Diagnosis;Sensitivity;Specificity
基金项目:广东省高等学校珠江学者岗位计划(2019);广东省高水平大学建设计划(G820332010,G618339167,G618339164);中国科协青年人才举托工程(2019QNRC001);国家自然科学基金(82041030);浙江大学COVID-19应急科研专项资金(K920330111)
作者单位E-mail
张文婷 南方医科大学公共卫生学院流行病学系, 广州 510515  
刘丹 南方医科大学公共卫生学院流行病学系, 广州 510515  
谢朝军 广州市疾病预防控制中心 511430  
申动 南方医科大学公共卫生学院流行病学系, 广州 510515  
陈宗遒 广州市疾病预防控制中心 511430  
李志浩 南方医科大学公共卫生学院流行病学系, 广州 510515  
刘远 广州市疾病预防控制中心 511430  
张希如 南方医科大学公共卫生学院流行病学系, 广州 510515  
陈沛良 南方医科大学公共卫生学院流行病学系, 广州 510515  
钟文芳 南方医科大学公共卫生学院流行病学系, 广州 510515  
杨佩 南方医科大学公共卫生学院流行病学系, 广州 510515  
黄清湄 南方医科大学公共卫生学院流行病学系, 广州 510515  
罗雷 广州市疾病预防控制中心 511430 llyeyq@163.com 
毛琛 南方医科大学公共卫生学院流行病学系, 广州 510515 maochen9@smu.edu.cn 
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中文摘要:
      目的 分析广州市新型冠状病毒肺炎(COVID-19)疫情防控不同阶段中,密切接触者新型冠状病毒(新冠病毒)核酸检测的灵敏度和特异度,为优化疫情防控策略提供科学依据。方法 2020年2月21日至9月22日广州市COVID-19病例的密切接触者20 348例,均已接受新冠病毒核酸检测。针对疫情防控的不同阶段,比较核酸检测的灵敏度和特异度。结果 20 348例密切接触者中,男性12 462例(61.24%),年龄MP25P75)为31.0(23.0,43.0)岁,核酸检测次数MP25P75)为2.0(1.0,3.0)次,隔离天数MP25P75)为12.0(8.0,13.0)d。研究对象经过7次核酸检测后,共确诊病例256例。第1、2、3和第7次核酸检测的灵敏度与特异度分别为72.44%与99.99%(确诊177例)、89.84%与99.99%(确诊230例)、97.27%与99.99%(确诊249例)、100.00%与99.98%。基于我国COVID-19疫情防控分为3个阶段(国内输入、境外输入和境外输入关联),首次核酸检测的灵敏度分别为70.68%、68.00%和67.35%,特异度分别为99.98%、100.00%和100.00%。结论 建议做核酸检测3次,可提高灵敏度并降低假阴性风险。对于广州市COVID-19疫情防控3个阶段,密切接触者核酸检测的灵敏度结果较为一致,但略有降低趋势,这可能与疫情防控后期阶段的无症状感染者比例增多相关。
英文摘要:
      Objective To analyze the sensitivity and specificity of SARS-CoV-2 nucleic acid testing in 20 348 close contacts of COVID-19 cases in different prevention and control stages in Guangzhou and provide scientific evidence for optimizing epidemic response strategies.Methods A total of 20 348 close contacts of COVID-19 cases in Guangzhou were traced between February 21 and September 22,2020. All the close contacts were tested for the nucleic acid of SARS-CoV-2. The sensitivity and specificity of nucleic acid testing and diagnosis in the different prevention and control stages were compared. Results In 20 348 close contacts, 12 462 were males (61.24%), the median(P25,P75) of age of them was 31.0 years (23.0,43.0), the median number (P25,P75) of nucleic acid testing for them was 2.0 (1.0,3.0), and the median (P25,P75) of their quarantine days was 12.0 (8.0,13.0) days, respectively. A total of 256 COVID-19 cases were confirmed in the close contacts after seven nucleic acid tests. In the 1st, 2nd, 3rd and 7th nucleic acid testing, the sensitivity and specificity were 72.44% and 99.99% (177 cases confirmed), 89.84% and 99.99% (230 cases confirmed), 97.27% and 99.99% (249 cases confirmed), and 100.00% and 99.98%, respectively. In the three stages of COVID-19 prevention and control in China: domestic case stage, imported case stage, and imported case associated local epidemic stage, the sensitivity of the 1st nucleic acid testing was 70.68%, 68.00% and 67.35%, and the specificity was 99.98%, 100.00% and 100.00%, respectively. Conclusions It is suggested to give three nucleic acid tests to improve the sensitivity and reduce false negative risk. The sensitivity of nucleic acid testing in the close contacts at the different stages were consistent with slight decrease, which might be related to the increased proportion of asymptomatic infections in the late stage of epidemic prevention and control with COVID-19 in Guangzhou.
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