Contents of questionnaire at T1, T2, and T3.
The first part of the questionnaire included questions to collect demographic information on age, marital status, education level, family monthly income, regular visits to a dentist, number of children, month of current pregnancy, and sources of dental information. The second part included questions about the use of social media, average hours spent on social media per day, the most-used social media platform, and average hours spent on Snapchat and WhatsApp per day. The third part assessed knowledge about oral health and dental setting treatments for pregnant women with 20 questions answered with yes, no, or I do not know. Each question had only one correct answer, and the scores for correct answers were totaled into the total knowledge score, with the highest score of 20 points (highest level of knowledge) and the lowest score of zero (no knowledge at all). The research team formulated the questions based on the information provided in the intervention for the SG and CG. The last section assessed the participants’ experiences and perceptions of the social media used in the study (Snapchat or WhatsApp). This part contained 10 statements, with answers ranging from 1 (strongly disagree) to 5 (strongly agree). Most of the questions in this last section were adapted with modifications from a previous study [The Snapchat videos and WhatsApp flyer were prepared two times before their final versions. The final version of the interventions, including the Snapchat videos, WhatsApp flyer, and questionnaire, went into a pilot study with 12 participants to validate the content, spelling, syntax, organization, clarity, grammar used in the questions, and audience comprehension. The content validation was done as the participants in the pilot were asked to the read the question, then to say it their way to be sure that the content is identical to the question content. The participants in the pilot round were not included in the main study analysis.