Table_2_Cross-sectional study on the epidemiological investigation ability of professional staff from Centers for Disease Control and Prevention in Guizhou Province.xlsx

IntroductionThis study aims to evaluate the qualifications and identify skill enhancement areas for epidemiological investigators in Centers for Disease Control and Prevention (CDCs) in Guizhou’s, informing future training and policy initiatives to strengthen public health responses.
MethodsA cross-sectional survey was conducted in August 2022, and an online, self-designed questionnaire on the Epidemiological Dynamic Data Collection platform was administered to evaluate the professional staff in CDCs. The responses were scored and presented using descriptive statistical methods, and the factors influencing the total score were analyzed by one-way ANOVA and linear regression.
Results and discussionA total of 1321 questionnaires were collected, yielding an average score of 14.86±3.49 and a qualification rate of 29.9%. The scoring rate of ability of individual protection and coordination in epidemic control was high (87.25%). Meanwhile, improvements in further training were needed in areas such as data analysis ability (23.67%), knowledge of site disinfection (40.40%), and epidemiological investigation skills (42.50%). No significant difference was observed between the scores of city and county CDCs, (t = 1.071, p =0.284). The effects of gender and age could be disregarded, and the experience in epidemiological work and training (including investigation on COVID-19 cases and contacts), educational background, and professional title partially explained the survey outcome (R Square of the linear regression model was 0.351). The survey indicated the need for additional well-trained epidemiologic investigators in Guizhou. Specified training was effective in improving epidemiologic investigation, and enhancement in data analysis ability and knowledge of field disinfection are recommended in professional staff cultivation.

引言
本研究旨在评估贵州省疾病预防控制中心（Centers for Disease Control and Prevention，CDCs）流行病学调查员（epidemiological investigator）的资质水平，并明确其技能提升方向，为后续强化公共卫生应对能力的培训与政策制定提供参考。

方法
本研究于2022年8月开展横断面调查，通过流行病学动态数据采集平台（Epidemiological Dynamic Data Collection platform）自行设计的在线问卷，对疾控系统专业人员进行评估。采用描述性统计方法对回收问卷进行评分与结果呈现，并通过单因素方差分析（one-way ANOVA）与线性回归（linear regression）分析影响总得分的相关因素。

结果与讨论
本次调查共回收有效问卷1321份，受访者平均得分为14.86±3.49，资质合格率为29.9%。其中，个人防护与疫情防控协调能力的得分率较高（87.25%）。但数据分析能力（23.67%）、现场消毒知识（40.40%）及流行病学调查技能（42.50%）等领域仍需通过后续培训加以提升。市级与县级疾控中心的得分无显著差异（t=1.071，P=0.284）；性别与年龄对得分无显著影响，而流行病学工作与培训经历（包括新冠病例及密切接触者调查经历）、学历及职称可部分解释调查结果（线性回归模型的决定系数R²为0.351）。本调查显示，贵州省亟需补充经过系统培训的流行病学调查员。针对性培训可有效提升流行病学调查能力，建议在专业人员培养中强化数据分析能力与现场消毒知识的培训。