Trial for the Prevention of Depression (TriPoD) in final-year secondary students: study protocol for a cluster randomised controlled trial

Table 2 Assessment administration schedule

Assessment	Construct	Baseline	Post-intervention	6 months	18 months	Other
Primary outcome
MDI	Depression symptoms	X	X	X	X
Secondary outcomes
ATAR	Academic performance					Collected via schools after final examination results are released
SCAS	Anxiety symptoms	X	X	X	X
YRBS	Suicidal ideation	X	X	X	X
DSS-P	Personal stigma	X	X	X	X
Predictor variables
SSSS	Social support	X
PMS	Mastery	X	X	X
RRS	Rumination	X	X	X
PID-5-BF	Personality traits	X
HPLS-Brief	Hopelessness	X
INQ	Belongingness/burdensomeness	X
ACSS	Capability	X
ISI	Sleep disturbance	X
MEQr	Sleep–wake patterns	X
PS/PC	Expressed emotion	X
Cost-effectiveness variables
TiC-P	Service use			X	X
Questionnaire	Days out of role			X	X
AQoL	Quality of life			X	X
Process variables
Questionnaire	Expectation of success	X
Intervention data	Adherence					Collected automatically via SPARX-R and lifeSTYLE
Questionnaire	Acceptability, usability		X
IIAM	Reasons for dropout		X
Parent outcomes
PHQ-9	Depression	X		X
GAD-7	Anxiety	X		X

ACSS Acquired Capability for Suicide Scale; AQoL Assessment of Quality of Life; ATAR Australian Tertiary Admission Rank; DSS-P Depression Stigma Scale–Personal Stigma subscale; GAD-7 Generalized Anxiety Disorder 7-item scale; HPLS Hopelessness Scale for Children; IIAM Internet Intervention Adherence Measure; INQ Interpersonal Needs Questionnaire; ISI Insomnia Severity Index; MDI Major Depression Inventory; MEQr Reduced version of the Morningness Eveningness Questionnaire PS/PC Perceived Sensitivity/Perceived Criticism scale; PHQ-9 Patient Health Questionnaire-9; PID-5-BF Personality Inventory for DSM-5; Brief Form; PMS Pearlin Mastery Scale; RRS Ruminative Response Scale; SCAS Spence Children’s Anxiety Scale; SSSS Schuster Social Support Scale; TiC-P Trimbos/iMTA questionnaire for Costs associated with Psychiatric illness; YRBS Youth Risk Behavior Survey

ISSN: 1745-6215