Table 3 SPIRIT schedule of enrolment, interventions, and assessments for SMART

Timepoint

-t₁

t₀

t₁

Enrolment:

 Identification of study clusters

X

 Cluster randomisation and allocation

X

 Adolescent eligibility screen

X

 Participant informed consent

X

Intervention:

 SMART

X

 Control

X

Assessments:

 Warwick Edinburgh Mental Wellbeing Scale

X

X

 Schwarzer Self-Efficacy Scale

X

X

 Rosenberg Self-Esteem Scale

X

X

 Adolescent Emotion Regulation Strategies Questionnaire

X

X

 Multidimensional Scale of Perceived Social Support

X

X

 Patient Health Questionnaire 9-item—modified for adolescents

X

X

 Generalised Anxiety Disorder 7-item

X

X

 Functional impairment tool

X

X