Personal-socio-demographic feature description of Total and Paired samples in both PRE-outbreak and POST-outbreak studies (adjusted matching).
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Personal-socio-demographic feature description of Total and Paired samples in both PRE-outbreak and POST-outbreak studies (adjusted matching).
个人-社会-人口统计学特征描述，包括在疫情前和疫情后研究中总样本和配对样本的详细情况（已调整匹配）。
