Table 1.

Feasibility metrics and thresholds of success

Feasibility metric	Measure of success
Practicality	Time:  • 15 min to complete tool activity in waiting room  • No differences in appointment length (experimental vs control)  • 15 min to complete outcome measures post-appointment Commitment:  • Recruitment: Willingness of staff to help recruit adolescents; ≥ 85% recruited (“n” enrolled/“n” screened and eligible for enrollment)  • Attrition: ≤ 15%
Implementation	≥ 95% completion of tool activity by adolescents ≥ 95% completion of goal-setting sheet by adolescents and physicians
Demand	Expressed interest or intention by clinic staff to use the tool post-study
Randomization protocol	• ≥ 85% adolescents willing to be randomized  • 100% accuracy of randomization procedures
Measurement protocol	100% and ≥ 85% assessment completed by adolescents at baseline and 3-weeks follow-up, respectively