A smartphone-based intervention for young people who self-harm (‘PRIMARY’): study protocol for a multicenter randomized controlled trial

Table 1 Schedule of outcome measures

Construct	Measure	Screening	Wave 1	Intervention Phase	Wave 2	Wave 3
ESM-questionnaire*	Developed for study			X
*Main study parameters*
Self-harming thoughts and behaviors	Developed for study	X
Emotion regulation	DERS-18		X		X	X
Quality of relationships	NRI-BSV		X		X	X
*Secondary parameters*
Evaluation of PRIMARY*	UMUX Modified CSQ-8				X
	Questions developed for the study
*Other parameters*
Demographics	Developed for study		X
Concomitant treatment	Developed for study		X		X	X
BPD symptoms	SCID-II BPD PQ	X
BPD behavior	BSL-23		X		X	X
Achievement of developmental milestones	DML		X		X	X
Life experiences	Modified LES		X		X
Psychopathology	SPSY		X		X	X
Alternative Model for Personality Disorders	LPFS-BF PID-5-BF		X		X	X
Impulsivity	S-UPPS		X
Internalizing problems	DASS		X		X	X
Loneliness	De Jong Gierveld questionnaire		X		X	X
Motivation for change	MYTS		X		X	X
Quality of life	ReQoL		X		X	X
Impact of COVID-19	Developed for study		X		X	X

*Only filled out by participants in the intervention group
ESM = Experience Sampling Method, DERS-18 = Difficulties in Emotion Regulation Scale, NRI-BSV = Network of Relationships Inventory – Behavior Systems Version, UMUX = Usability Metric for User Experience, CSQ = Client Satisfaction Questionnaire, SCID-II BPD PQ = BPD section of the Structured Clinical Interview for DSM-IV Axis II disorders Personality Questionnaire, BSL-23 = Borderline Symptom List, DML = Developmental Milestones List, LES = Life Experiences Survey; SPSY = Screeningsinstrument Psychische Stoornissen, LPFS-BF = Levels of Personality Functioning Scale 2.0 Brief Form, PID-5-BF = Personality Inventory for DSM-5 Brief Form, S-UPPS = UPPS-P impulsive behavior scale short version, DASS = Depression Anxiety Stress Scales, MYTS = Motivation for Youth Treatment Scale, ReQoL = Recovering Quality of Life

ISSN: 1471-244X