Table 1.

Inclusion criteria

	Inclusion Criteria	Exclusion Criteria
Setting	All countries	None
Participants	Those aged between 15 and 35 years, inclusive (at least 2 time‐points within that range)	Those aged below 15 years of age or above 35 years of age   Participant groups selected based on a preexisting health condition (including prediabetes but excluding weight status)
Exposure	Life transitions related to entering or leaving education and employment: eg, leaving high school, starting postsecondary education, leaving post‐secondary education, starting employment, and leaving employment	Papers that do not include data pre and post an education or employment transition
Outcomes	Individual level change in the following outcomes:   Diet: intake of energy, macronutrients, foods, food groups, and dietary patterns   Eating behaviours: eg, eating outside the home, fast food consumption, social aspects of eating, meal and snack consumption, and cooking   Physical activity: moderate‐to‐vigorous physical activity, vigorous physical activity, light physical activity, total activity, sport participation, active travel, and energy expenditure   Adiposity: BMI, body weight, body composition, anthropometry, overweight, and obesity	Studies including no dietary, PA, or adiposity outcomes   Studies reporting tracking of outcomes only with no data on absolute change in behaviour   Studies reporting solely on alcohol intake   Studies reporting on eating disorders or weight reduction behaviour   Studies reporting on dietary supplements only
Study type	Longitudinal prospective quantitative studies, with data reported including on specified outcomes before and after becoming a parent   Observational analyses of longitudinal data that was originally collected as part of an intervention/trial but reported as a separate analysis	Other quantitative study types   Qualitative study   Intervention studies/trial analyses   Reviews   Case‐control studies   Retrospective study
Publication type	Journal article	Conference abstract, study protocol, report, dissertation, book and professional journal
Publication year	Any
Language	English	All other languages