Assignment of Interventions, Allocation, and Blinding
Participants were randomly assigned 1:1 to either the SAS Intervention group or the SOC Control group. A computer-generated randomization sequence was used to assign participants to their respective groups. To implement the randomization, a table with the randomized sequence was created, and participants were added sequentially as they were enrolled in the study. The randomization sequence was masked and applied to the table by a member of the research team who was not involved in recruiting or interviewing participants. In this way, participants were allocated equally to either the control or intervention groups without the recruiters or interviewers being aware of the group to which individual participants had been assigned. In this way, both the recruiters and interviewers remained blinded to the allocation throughout the study. After the knowledge survey had been administered, the interviewers were unblinded and able to administer the maternal satisfaction questionnaire, focused on experiences using the videos, to the SAS Intervention mothers.