Materials and Methods
A retrospective observational study was conducted between Blinded for review and the Baidu Index, over 5 years between January 2017 to December 2021. Based on Baidu Index (https://index.baidu.com), we chose Beijing as the research object, use adenoid hypertrophy(腺样体肥大) as the keyword, and recorded the search volume of terms weekly. Meanwhile, we collected the demand map, population portrait, and other related information. Blinded for review is one of the largest children’s hospitals in Beijing, the number of children diagnosed with adenoid hypertrophy was collected from the Information department of this hospital at the same time, and the number of visits was calculated by week. SPSS 26.0 software was used for statistical analysis, and a correlation analysis was conducted between the data obtained from the Baidu platform and the number of outpatient visits. Meanwhile, the volume of search data and the number of outpatient visits were compared before and after the COVID-19 outbreak. P < 0.05 was considered to be statistically significant.