Effectiveness and acceptance of a web-based depression intervention during waiting time for outpatient psychotherapy: study protocol for a randomized controlled trial

Table 1 Overview of measurements

Variables	Instrument	Screening	T1	T2	T3
Inclusion/exclusion criteria
Age	SR	x
Internet access	SR	x
Depressive symptoms	CES-D	x
Non-Suicidality	BSI item 9		x
Effectiveness
Primary outcome
Depressive symptoms	CES-D	x	x	x	x
Secondary outcomes
Depressive symptoms (categorical)	PHQ-9		x	x	x
Health-related quality of life	SF-12		x	x	x
Psychological symptoms	BSI		x	x	x
Attitudes towards psychotherapy	ATSPPH-SF		x	x	x
Attitudes towards web-based interventions	ATSPPH-SF (adapted version)		x	x	x
Adverse events	INEP			x
Acceptance
Motivation to use a web-based intervention	SR	x
Intervention adherence	Response and dropout rate	x		(x)
Intervention satisfaction	CSQ-8			(x)
Sample characteristics
Demographic variables	SR		x
Internet affinity	IAS		x
Health care utilization	FIMA			x
Current Psychotherapy	SR		x	x	x

Note. T1 baseline, T2 post-treatment, T3 follow-up, x intervention and control group, (x) only intervention group, SR self-report, CES-D Center for Epidemiologic Studies Depression Scale, BSI Brief Symptom Inventory, PHQ-9 Patient Health Questionnaire, SF-12 Health Survey, ATSPPH-SF Attitude Towards Seeking Professional Psychological Help- Short Form, INEP Inventory for the Assessment of Negative Effects of Psychotherapy, CSQ-8 Client Satisfaction Questionnaire, IAS Internet Affinity Scale, FIMA Questionnaire for Health-Related Resource Use in an Elderly Population

ISSN: 1745-6215