| 苟发香,张晓曙,姚进喜,于德山,魏孔福,张宏,杨筱婷,杨建军,刘海霞,成瑶,蒋小娟,郑芸鹤,吴斌,刘新凤,李慧.甘肃省新型冠状病毒肺炎流行病学特征分析[J].Chinese journal of Epidemiology,2020,41(9):1415-1419 |
| 甘肃省新型冠状病毒肺炎流行病学特征分析 |
| Epidemiological characteristics of COVID-19 in Gansu province |
| Received:February 29, 2020 |
| DOI：10.3760/cma.j.cn112338-20200229-00216 |
| KeyWord: 新型冠状病毒肺炎 流行病学特征 |
| English Key Word: COVID-19 Epidemiological characteristic |
| FundProject:国家科技重大专项（2017ZX10103006） |
| Author Name | Affiliation | E-mail | | Gou Faxiang | Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China | | | Zhang Xiaoshu | Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China | | | Yao Jinxi | Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China | | | Yu Deshan | Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China | | | Wei Kongfu | Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China | | | Zhang Hong | Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China | | | Yang Xiaoting | Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China | | | Yang Jianjun | Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China | | | Liu Haixia | Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China | | | Cheng Yao | Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China | | | Jiang Xiaojuan | Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China | | | Zheng Yunhe | Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China | | | Wu Bin | Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China | | | Liu Xinfeng | Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China | liuxf606@126.com | | Li Hui | Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China | |
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| Abstract: |
| 目的 对甘肃省确诊的新型冠状病毒肺炎（COVID-19）病例进行流行病学特征分析，探索疫情流行的阶段性特征。方法 通过流行病学调查收集甘肃省COVID-19病例资料，包括基本资料、流行病学史、发病、就诊和确诊时间、临床表现等信息。结果 截至2020年2月25日，甘肃省共报告91例确诊病例，COVID-19流行分为输入病例期、输入病例与本地病例并存期、本地病例为主期3个阶段。聚集性疫情病例共63例（69.23%）。医务人员有3例，均为非职业暴露感染。首发症状为发热、咳嗽和乏力的比例分别为54.95%（50/91）、52.75%（48/91）和28.57%（26/91），且在3个阶段中的比例呈下降趋势，但只有发热与乏力症状的差异有统计学意义（趋势χ2值分别为2.20和3.18，P<0.05）；3个阶段的重型/危重型病例比例分别为42.86%（6/14）、23.73%（14/59）和16.67%（3/18），呈下降趋势（H=6.40，P<0.05）；潜伏期随着疫情的3个阶段有延长的趋势（F=51.65，P<0.01）；发病到就诊、发病到确诊的时间间隔随着疫情进展有缩短的趋势（F值分别为5.32和5.25，P<0.01）；基本再生数（R0）从输入病例期的2.61降至本地病例为主期的0.66。结论 甘肃省COVID-19流行早期均为湖北省输入，聚集性疫情占三分之二，未发现医务人员职业性暴露感染。总体流行呈阶段性变化特征，随着疫情进展有首发症状不明显和潜伏期延长的特点，并提示体温监测不能作为单一的早期筛查手段。 |
| English Abstract: |
| Objective To understand the epidemiological characteristics of COVID-19 cases in different epidemic stages in Gansu province. Methods Epidemiological investigation was conducted to collect the information of confirmed COVID-19 cases, including demographic, epidemiological and clinical information. Results As of 25 February 2020, a total of 91 confirmed COVID-19 cases had been reported in Gansu. The epidemic of COVID-19 in Gansu can be divided as three different stages, i.e. imported case stage, imported-case plus indigenous case stage, and indigenous case stage. A total of 63 cases were clustered cases (69.23%), 3 cases were medical staff infected with non-occupational exposure.The initial symptoms included fever (54.95%, 50/91), cough (52.75%, 48/91), or fatigue (28.57%, 26/91), the proportion of each symptom showed a decreasing trend along with the three epidemic stages, but only the differences in proportions of fever (trend χ2=2.20, P<0.05) and fatigue (trend χ2=3.18, P<0.05) among the three epidemic stages were statistically significant. The cases with critical severe symptoms accounted for 42.85% (6/14), 23.73% (14/59) and 16.67% (3/18), respectively, in three epidemic stages, showed a decreasing trend (H=6.45, P<0.05). Also, the incubation period prolonged along with the epidemic stage (F=51.65, P<0.01), but the intervals between disease onset and hospital visit (F=5.32, P<0.01), disease onset and diagnosis (F=5.25, P<0.01) became shorter along with the epidemic stage. Additionally, the basic reproduction number (R0) had decreased from 2.61 in imported case stage to 0.66 in indigenous case stage. Conclusions The COVID-19 epidemic in Gansu was caused by the imported cases, and about 2/3 cases were clustered ones. No medical worker was observed to be infected by occupational exposure. With the progression of COVID-19 epidemic in Gansu, the change in initial symptom and incubation period suggests. the early screening cannot only depend on body temperature monitoring. |
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