Effects of nurse-led motivational interviewing of patients with chronic musculoskeletal pain in preparation of rehabilitation treatment (PREPARE) on societal participation, attendance level, and cost-effectiveness: study protocol for a randomized controlled trial

Table 2 Outcome measures, abbreviation instrument, and assessment moments PREPARE study

		Baseline	Two sessions	After pre-treatment	Start pain rehab treatment	Finish pain rehab treatment	6 months after T3
	Abbr.	T0^a		T1	T2^a	T3^a	T4
Covariates
Demographics patient		x
*Primary outcome effect evaluation*
Participation	USER-P	x		x		x	x
*Secondary outcomes effect evaluation*
Physical functioning/disability	PDI	x			x	x	x
Pain intensity	VAS	x			x	x	x
Main complaints	PSC	x			x	x	x
Drop-out/adherence				#		#
Self-efficacy/perceived competence	GSE	x		x		x	x
Pain-specific self-efficacy scale	CPSS_V2	x		x		x	x
*Cost-effectiveness evaluation*
Cost questionnaire	Tic-P	x			x		x
Productivity losses	SF-HLQ	x			x		x
Quality of life/health status	SF-36	x			x	x	x
Potential active ingredients MI
Stages of change	MPRCQ 2	x		x
MI integrity/fidelity			*
Potential moderators
Credibility and expectancy of the treatment	CEQ	x		x	x
Motivation	TMQ	x		x
Depression	BDI	x			x	x
Acceptance	AAQ-II	x		x		x
Flexible goal-adjustment	FGA	x		x		x
Process evaluation
Satisfaction with (pre-)treatment				x +
Client-centeredness	CCCQ			x
Feasibility				+

ISSN: 1745-6215