Table 1 Eligibility criteria using the PECO format
Criterion | Definition |
|---|---|
(P) Population | • Secondary school students (age 11–18) • Focused on whole population or students of a low socioeconomic status • Papers published from 1997 onwards, using data from 1997 onwards • Papers with abstracts written in English |
(E) Exposure | • Network characteristics (number of ties, network structure, betweenness and degree centrality, density) • Any study conducting cross-sectional or longitudinal network analysis |
(C) Comparator | • Not applicable |
(O) Outcome | • Link between network characteristics and smoking behaviour and attitudes • Network characteristics • Smoking prevalence |