Study protocol of the Our Futures Vaping Trial: a cluster randomised controlled trial of a school-based eHealth intervention to prevent e-cigarette use among adolescents

Table 1 SPIRIT flow diagram: schedule of enrolment, interventions, and assessments

	Study Period
	Enrolment	Allocation	Post-allocation					Close-out
TIMEPOINT	-t₁	0	t₁ baseline	t₂ 5 weeks	t₃ 6 months	t₄ 12 months	t₅ 24 months	t₆ 36 months
ENROLMENT
Eligibility Screen	X
School enrolment	X
Allocation		X
Informed consent			X
INTERVENTION
Health education as usual (active control)
OurFutures Vaping program (intervention)
ASSESSMENT
Primary Outcomes			X	X	X	X	X	X
Secondary Outcomes (except RUQ & SDQ)			X	X	X	X	X	X
Secondary Outcomes (RUQ & SDQ)			X	X		X	X	X
Process outcomes				X

Note: RUQ = Resource Use Questionnaire; SDQ = Strengths & Difficulties Questionnaire.

ISSN: 1471-2458