Exploring the Lagged Correlation Between Baidu Index and Influenza-Like Illness-China,2014-2019

作     者：Xuan Han Jiao Yang Yan Luo Dazhu Huo Xuya Yu Xuancheng Hu Ling Xin Liuyang Yang Hualei Xin Ting Zhang Zhongjie Li Weizhong Yang 

作者机构：School of Population Medicine and Public HealthChinese Academy of Medical Sciences(CAMS)&Peking Union Medical CollegeBeijingChina School of Health Policy and ManagementChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijingChina Department of management science and information systemFaculty of Management and EconomicsKunming University of Science and TechnologyKunming CityYunnan ProvinceChina 

出 版 物：《China CDC weekly》 (中国疾病预防控制中心周报（英文）)

年 卷 期：2024年第6卷第26期

页      面：629-634页

核心收录：

学科分类：1004[医学-公共卫生与预防医学(可授医学、理学学位)] 100401[医学-流行病与卫生统计学] 10[医学] 

基　　金：Supported by CAMS Innovation Fund for Medical Sciences(2021-I2M-1-044) National Key Research and Development Program of China(2023YFC2308701) 

主　　题：utilizing illness Baidu 

摘      要：Introduction:This study investigated the lagged correlation between Baidu Index for influenza-related keywords and influenza-like illness percentage(ILI%)across regions in *** aim is to establish a scientific foundation for utilizing Baidu Index as an early warning tool for influenza-like illness ***:In this study,data on ILI%and Baidu Index were collected from 30 provincial-level administrative divisions(PLADs)spanning April 2014 to March *** Baidu Index was categorized into Overall Index,Ordinary Index,Prevention Index,Symptom Index,and Treatment Index based on search query *** lagged correlation between the Baidu Index and ILI%was examined through the cross-correlation function(CCF)***:Correlating the Baidu Overall Index of 30 PLADs with ILI%revealed CCF values ranging from 0.46 to 0.86,with a median lag of 0.5 *** analysis indicated that the Prevention Index and Symptom Index exhibited quicker responses to ILI%,with median lags of−9 and−0.5 days,respectively,compared to 0 and 3 days for the Ordinary and Treatment *** median lag days between the Baidu Index and the ILI%were earlier in the northern PLADs compared to the southern ***:The Prevention and Symptom Indexes show promising predictive capabilities for influenzalike illness epidemics.