九龙坡区新型冠状病毒肺炎病例密切接触者特征分析  

Features of close contacts of COVID-19 cases in Jiulongpo District

作　　者：陈橙 夏云丽 孙亚军 雷鹏 肖伦[1] CHEN Cheng;XIA Yunli;SUN Yajun;LEI Peng;XIAO Lun(Jiulongpo Center for Disease Control and Prevention,Chongqing 400039,China)

机构地区：[1]重庆市九龙坡区疾病预防控制中心,重庆400039

出　　处：《预防医学》2020年第9期882-885,共4页CHINA PREVENTIVE MEDICINE JOURNAL

基　　金：重庆市九龙坡区科技计划项目(2019-02-001-Z)。

摘　　要：目的分析重庆市九龙坡区新型冠状病毒肺炎(COVID-19)病例密切接触者特征,为密切接触者管理和COVID-19疫情防控提供依据。方法以2020年1月22日—4月10日重庆市九龙坡区COVID-19病例密切接触者为研究对象,按照《新型冠状病毒肺炎防控方案(第六版)》收集人口学信息、接触史和临床诊断等资料,描述性分析密切接触者的发现时间分布、人口学特征、感染情况及影响因素。结果排查密切接触者602人,检出COVID-19确诊病例/无症状感染者30例,罹患率为4.98%,其中27例在2月10日前确诊。密切接触者年龄集中于20~<60岁,457人占75.91%。医务人员64人,占10.63%。与接触病例大多为亲属关系,219人占36.38%。接触频率以偶尔为主,338人占56.15%。接触地点以家庭为主,190人占31.56%。接触方式以同餐为主,181人占30.07%。≥40岁的密切接触者罹患率为7.49%,高于<40岁的2.37%(P<0.05)。密切接触者罹患率随接触频率增加呈上升趋势(P<0.05)。与接触病例关系、接触地点、接触方式不同的密切接触者罹患率差异均有统计学意义(P<0.05);其中同事、亲属关系的密切接触者罹患率较高,分别为20.41%和8.68%;工作场所和家庭的密切接触者罹患率较高,分别为17.54%和10.00%;同床、同住和同室工作学习的密切接触者罹患率较高,分别为44.44%、18.60%和17.24%。结论重庆市九龙坡区COVID-19病例密切接触者以家庭内、亲属间接触为主,≥40岁及家庭、工作场所接触的密切接触者感染风险较高。Objective To explore the features of close contacts of coronavirus disease 2019(COVID-19)cases in Jiulongpo District,Chongqing,so as to provide evidence for the management of close contacts and the control of the epidemic.Methods Demographic characteristics,contact history and medical records of close contacts of COVID-19 cases in Jiulongpo District from January 22 to April 10,2020 was collected according to the COVID-19 Prevention and Control Program(sixth version).Descriptive statistical analysis was performed.Results Totally 602 close contacts were found,and 30 of them were infected,with an attack rate of 4.98%.Twenty-seven cases were diagnosed before February 10.The close contacts mainly aged from 20 to 59 years(457,75.91%);most were relatives of COVID-19 cases(219,36.38%),and 64(10.63%)were medical staff.Most contacted occasionally(338,56.15%),at home(190,31.56%),and through the same meal(181,30.07%).The attack rate of close contacts aged 40 years and over was 7.49%,which was higher than 2.37%of those aged under 40 years(P<0.05).The attack rate of close contacts increased with contact frequency(P<0.05).The attack rates of close contacts were significantly different in different relations with cases,contact places and contact modes(P<0.05);the attack rates of colleagues and relatives were 20.41%and 8.68%;the attack rates of close contacts in the workplace settings and family were 17.54%and 10.00%;the attack rates of sharing the same bed,living in the same room and working in the same room were 44.44%,18.60%and 17.24%.Conclusions The close contacts of COVID-19 cases in Jiulongpo District,Chongqing who aged 40 years or above,exposed in family settings and in the workplace were associated with higher risk of infection.

关 键 词：新型冠状病毒肺炎 密切接触者 传播途径 

分 类 号：R563.1[医药卫生—呼吸系统] R181.3[医药卫生—内科学]