Table 3.

Primary and secondary outcomes and their assessment.

Outcomes		Assessment method	Time point
Primary outcomes
	User engagement (adolescents and parents) with the program	Access of 14 program sessions, expressed as a proportion of content covered as measured by Moodle metrics	From the start to the end of the program (14 weeks)
	Adolescent self-reported weight status	Height and weight used to calculate BMIza [43] and International Obesity Task Force extended weight status [29]	Change from preprogram (enrollment) to postprogram (after 14-week intervention)
Secondary outcomes
	Adolescent diet behavior	Children's Dietary Questionnaire [44] and Serves of Core Foods [45]	Change from preprogram (enrolment) to postprogram (after 14-week intervention)
	Adolescent physical activity behavior	7-day 24-hour accelerometry, GENEActiv Original wrist-worn accelerometer [46] on nondominant hand [47] and Adolescent Physical Activity Recall Questionnaire [48]	Change from preprogram to postprogram (after 14-week intervention)
	Adolescent sedentary behavior	7-day 24-hour accelerometry, GENEActiv wrist-worn accelerometer [46] on nondominant hand [47] and Adolescent Sedentary Activity Questionnaire [49]	Change from preprogram (enrollment) to postprogram (immediately after a 14-week intervention)
	Adolescent self-perception	Harter self-perception profile for adolescents [50]	Change from preprogram (enrollment) to postprogram (immediately after a 14-week intervention)
	Parent and adolescent program satisfaction	Purpose-designed questionnaire	Postprogram (immediately after the 14-week intervention)
	Parent and adolescent program satisfaction	Qualitative interviews	Postprogram

^aBMIz: body mass index z-score.