Table 3. Data to be extracted.

Article information	Year of publication Country of study Study design Sample size Sample demographics (age, gender, target population) Study duration
Intervention	Name of recommender system Health condition(s)/behaviour(s) targeted Type of recommendations provided (information, action, other resources)
Evaluation	Evaluation methodology Outcomes measured Main findings (ie, accuracy, improved health outcomes, user engagement, drop-out rates) Participant satisfaction/perspectives (if reported) Strengths of study Limitations/weaknesses of study