Table 1.

Eligibility criteria for quantitative and qualitative studies

	Inclusion	Exclusion
Quantitative studies
Population	• Young people living with HIV (aged 15–24 years)	• Studies were < 50% of the population is between the ages of 15–24 years • Studies that focus on specific population groups (i.e. orphans, LGBTQI, pregnant or post-partum women, sex workers, homeless youth, patients with co-morbidity)
Study design	• Observational research study designs or standard of care arm from a trial • Studies that statistically examined factors associated with subjective or psychological wellbeing or any of its dimensions using regression techniques • Studies that statistically examined factors associated with mental health (i.e. mental illness- depression, anxiety) using regression techniques	• Letters, opinion pieces, editorials, reviews, qualitative studies • Psychometric evaluations • Studies were the sample size is n < 50
Outcomes	• Predictors of any dimension of subjective or psychological wellbeing or mental health	• Outcomes related to physical functioning • Outcomes related to objective measures of quality of life (i.e. birth rate, school completion, mortality)
Other	• Peer-reviewed journal articles and non-published studies (conference abstracts, dissertations, working papers) • English and non-English studies • Studies conducted between January 2000–May 2019
Qualitative studies
Sample	• Young people living with HIV (aged 15–24 years) • Caregivers of young people aged 15–24 years, healthcare workers, educators, other family members	• Studies that focus on specific population groups (i.e. orphans, LGBTQI, pregnant or post-partum women, sex workers, homeless youth, patients with co-morbidity)
Phenomenon of interest	• Subjective and psychological wellbeing, mental health	• Studies examining objective measures of quality of life
Design	• Studies incorporating any form of qualitative study design, data collection method or analytical technique • Cross-sectional or longitudinal	• Studies with YPLHIV in the intervention arm of a trial • Reviews, editorials, letters, essays, theoretical and opinion papers • Studies evaluating a specific policy, programme or intervention
Evaluation	• Studies aimed at understanding the lived experiences of wellbeing or experiences related to any dimension of wellbeing or mental health	• Narrow focus on physical functioning, ART adherence, disclosure challenges, sexual reproductive health needs
Research type	• Qualitative or mixed-methods	• Quantitative studies
Other	• Peer-reviewed journal articles and non-published studies (conference abstracts, dissertations, working papers) • English and non-English studies • Studies conducted between January 2000–May 2019