Table 2.

Secondary outcomes and the instruments we will use.

Outcome and measures		Instruments
Main secondary outcomes
	Cognitive score	Montreal Cognitive Assessment (face-to-face and telephone versions) [31,32]
	Pain VASa	100-mm VAS (numerical; 100 being the worst possible pain) [33]
	Sleep self-assessment	Global Sleep Assessment Questionnaire (11 items with response options of “never,” “sometimes,” “usually,” and “always”; item responses were converted to a common scale from 0 to 100, with a higher score indicating greater likelihood of presence of the disorder) [34]
Additional secondary outcomes
	Sleep effectiveness	Actigraphy registration 2 weeks before and after the intervention (subgroup only)
	Quality of life	EQ-5D-5L (Norwegian population norm valuation); measured on a scale from 0 to 1, with 1 representing perfect health [35]
	Dependence-like behavior	Severity of Dependence Scale (5 questions, total score range from 0 to 15, with 15 being the most severe) [36]
	Additional cognitive assessments	Cognistat (numerical score from 0 to 84, with 84 being the best) [37] CFIb (Norwegian self-assessed cognitive instrument) and FASc word score
	Polypharmacy	Number of drugs used regularly
	Anxiety and depression	Hospital Anxiety and Depression Scale (0-42, with 42 being the worst) [31,38]
	Willingness to change	Qualitative group interview
	Acceptability	Qualitative group interview

^aVAS: visual analogue scale.

^bCognitive Function Instrument (Norwegian version).

^cF-A-S word association test.