Table 3.

Preliminary plan of quantitative and qualitative data triangulation.

Evaluation components	Quantitative indicators	Qualitative indicators
Fidelity	Frequency of intervention activities delivered and adaptation of intervention strategies in the process	Perceived level of implementation of key stakeholders, difficulties encountered in the implementation process, and parents’ and teachers’ feedback on the adaptations
Dose delivered	Number of app-based sessions, activities, and group meetings and intervention tools delivered to the families	Teachers’ experience and perception of the program and the difficulty of delivering the activities encountered by teachers and school heads
Dose received	Participation rate of intervention activities, length of viewing health education courses, and salt reduction knowledge received	Participants’ experience of the program, including satisfaction and perception of the program, and the most effective intervention module in participants’ opinions
Reach	Proportion of eligible students who participated in each intervention strategy, number of dropout, and retention rate	Reasons for participation and reasons for dropping out
Context	N/Aa	Related contextual factors affecting the implementation of the program, including barriers and facilitators identified by multiple stakeholders

^aN/A: not applicable.