Using mHealth to promote parents’ brushing of preschool children’s teeth: a protocol for a randomized factorial trial using the Multi-phase Optimization Strategy (MOST)

Table 1 Candidate intervention components

Intervention component	Target construct	Frequency of delivering the component	Method of delivery and setting
Constant component	Core knowledge	Once at baseline	Pamphlets in clinic
MI	Perception of control	1 MI session + 3 phone calls	Face to face in clinic + phone calls
OHPM	Perceived norms	Determined during the feasibility pilot study	mHealth: electronic messages via WhatsApp messenger
ST videos	Attitude	Determined during the feasibility pilot study	mHealth: electronic messages via WhatsApp messenger

ISSN: 1745-6215