Theory	RCTs of children aged 0−5	RCTs of children aged 6−12	RCTs of children aged 13−18
Anticipatory guidance	✓
Attachment theory	✓
Attitude, social influence and self−Efficacy (ACE model)			✓
Behavioural choice theory		✓
Control theory			✓
Ecological and developmental systems theories		✓
Environmental change theory		✓
Exposure theory	✓
Family systems theory		✓
Group socialization theory		✓
Health belief model	✓	✓
Health promotion model		✓
Implementation intentions			✓
Information−motivation behavioral skills model			✓
Investigation, vision, action and change methodology		✓
Positive youth development		✓
Precaution adoption process model	✓		✓
Self−determination theory	✓	✓	✓
Social cognitive theory	✓	✓	✓
Social learning theory		✓	✓
Sociocultural theory		✓
Socioecological model	✓		✓
Theories of information processing	✓
Theory of interactive technology			✓
Theory of planned behaviour	✓		✓
Theory of reasoned action, constructivism		✓
Transtheoretical model−stages of change			✓
Number of theories	10	14	12