Effectiveness of blended depression treatment for adults in specialised mental healthcare: study protocol for a randomised controlled trial

Table 2 Overview of measures

Variable	Instrument	T0^*	T1^*	T2^*	T3^*
Measures taken from patient
Demographics (patient characteristics)		X
Current and history of treatment		X
Diagnosis of depression and comorbid disorders	M.I.N.I. 5.0	X			X
Depressive symptoms	PHQ-9	X	X	X	X
Depressive symptoms & severity	QIDS-SR-16	X	X	X	X
Health related well-being (QALY)	EQ-5D-5L	X	X	X	X
Health care uptake and productivity losses TIC-P	TIC-P	X	X	X	X
Sense of mastery	SOMS	X	X	X	X
Treatment preference		X
Patient expectancy	CEQ	X
Therapeutic alliance	WAI-SF-PT		X
Technology alliance	WAI-Online Therapy^a		X
Client satisfaction with treatment	CSQ-8		X
Satisfaction with the online program SUS	SUS^a		X
Possible negative side-effects	INEP			X
Measures taken from therapist
Therapeutic alliance	WAI-SF-TH^b		X
Satisfaction with the online program	SUS^c		X

^aOffered to condition receiving blended treatment only
^bHas to be completed for each patient. Offered at the same time point as T1 assessment of the patient
^cHas to be completed once per therapist after completion of the first blended treatment
*T0 refers to baseline and T1, T2 and T3 to the 3, 6 and 12 month questionnaires

ISSN: 1471-244X