Table 2.

Outcome measures and assessment time points for adolescents

Variables	Measure	Instrument	Assessment interval
			Baseline	Follow-up
Primary outcome	Feasibility metrics and thresholds documented continually
Secondary outcomes–behavioral and affective-cognitive outcomes	Collaborative goal-setting Degree of and effort made for goal achievement	Patient perception of collaborative goal setting Researcher-developed question	T1	T2
Secondary outcomes–process evaluation items	Tool user experience* Tool likeability, usefulness, feasibility, and usability* Priorities for outcome measures	User experience questionnaire Researcher-developed questionnaire Researcher-developed question	T0 T1	T2

*Experimental group only