The implementability and proximal effects of a transdiagnostic mental health intervention for adolescents (Kort): protocol for a mixed-methods intensive longitudinal study

Table 3 Outcomes, instrument, data collection method, informant, and timepoint for all measures

	Instrument	Method of Data Collection	Informant	Time- point
	Instrument	Method of Data Collection	Informant	T1	T2	T3	T4	EMA	DD
Intervention Outcomes
Mental Health literacy	Self-developed	Quant	A	x		x	x
Emotion Regulation (Trait)	DERS-SF	Quant	A	x	x	x	x
Emotion Regulation (State)	Self-developed	Quant	A					x	x
Emotions (State)	PANAS	Quant	A					x	x
Mindfulness	FFMQ-15^a	Quant	A	x		x	x
Distorted Thinking/Cognitive Fusion	CFQ	Quant	A	x		x	x
Internalizing and Externalizing Symptoms	BFS	Quant	A	x	x	x	x
Well-being	SWEMWBS	Quant	A	x	x	x	x
Functional Impairment	Self-developed	Quant	A	x		x	x
Loneliness	T-ILS	Quant	A	x		x	x
Self-compassion	SCS-Y^b	Quant	A	x		x	x
Sleep Quality	Self-developed	Quant	A	x		x	x
Friendships	Self-developed	Quant	A	x		x	x
Appropriateness	IAM	Quant	SN	x		x	x
Feasibility	FIM	Quant	SN	x		x	x
Usability	IUS	Quant	SN	x		x	x
Determinants
Alliance	WAI-SR	Quant	A		x	x			x
Demographics	Self-developed	Quant	A, SN	x
Background variables (SES, ethnicity)	Self-developed	Quant	A	x
Fidelity^c	Self-developed	Quant	SN
Adherence^d	Self-developed	Quant	A						x
Readiness for change	Readiness for Change Measure	Quant	SN	x		x	x
Implementation intentions	MISII	Quant	SN	x		x	x
Experiences with responding to questionnaires	Selv-developed	Quant	A

A adolescent, SN school nurse, EMA ecological momentary assessment, DD daily diary
^aThree subscales were selected (Describing, Non-judging, and Non-reactivity)
^bTwo subscales were selected (Kindness and Judging)
^cA short fidelity survey is filled out by the SN after every consultation
^dThere is a total of 24 different adherence questions, and which ones adolescents receives depends on the elements and components school nurses reports to have used in a given consultation

ISSN: 1472-6963