Table 1. Inclusion and exclusion criteria.

Inclusion criteria	Exclusion criteria
Studies/reports involving:	Studies/reports involving:
•Adolescents (nominal age range 9–24 years*) and •Physiological development, including developmental influencers (e.g. biochemical influences, hormonal activity, enzyme activity, neurotransmitters etc.), with related outcomes and •Sexual health behaviour, including lifestyle or behavioural factors/outcomes, and decision-making	•Children (e.g. under 9 years*) as sole focus and/or •Adults (e.g. >24 years of age*) as sole focus and/or •Atypical or pathological physical /psychological/physiological developmental focus (e.g. eating disorders, addictions, gambling, or major mental health disorders), and their treatment interventions •Adolescent pregnancy (as sole focus) •Incidence, prevalence or trend papers (as sole focus) •Protocols for studies yet to be undertaken

^*No definitive age criteria were set to avoid excluding potentially relevant research.