Study design
A multi-center RCT was conducted to evaluate the effectiveness of an internet-based support program (ISP) on the improvements of MSE, social support; and the alleviation of PPD symptoms for Chinese primiparous women during the COVID-19 pandemic. The study was strictly adhered to the guidelines of the Declaration of Helsinki, and approved by the Ethics Committee of Medical School, X University (Approval number: 2020011). The trial protocol was published in January (