Participants, randomization, and blinding
depression, Depression
MAY
The participants were recruited in the maternity wards of two tertiary public hospitals (about annual birth of 4,000 per hospital) in Shenzhen City, Guangdong Province of China. The inclusion criteria are: (1) primiarous women with healthy babies; (2) ≥18 years old; (3) married; (4) having ability to response; (5) being available to the internet. The exclusion criteria are: (1) women having depression history; (2) with a serious physical or mental condition of either the mother or the infant; (3) women undergoing any other physical or psychological intervention.The information sheets were distributed to all eligible women to introduce the purposes and process of the clinical trial. The participants were informed of freedom to withdraw at any time and were assured of confidentiality by using special code numbers to identify themselves. The informed consent was obtained from every participant before data collection. With a power of 0.80, an alpha set at 0.05 and an effect size of 0.35 for the outcome of PPD (EPDS scores), each group was 90 women (From May 2020 to March 2021, a total of 492 primiparous women were approached. Of which, 149 women were declined to participant, and 101 women were excluded as they did not meet the inclusion criteria. Finally, 242 participants were recruited in the study. The Consolidated Standards of Reporting Trials (CONSORT) (Consolidated Standard of Reporting Trials (CONSORT) flowchart in the research. SICS, the Self-efficacy in Infant Care Scale; EPDS, Edinburgh Postnatal Depression Scale; PSSS, Postnatal Social Support Scale.