Notes on verification

Sample size (3,418), age range (10-14), and urban Italian setting are strongly corroborated across multiple peer-reviewed sources (Frigerio et al. 2006, 2009). The specific '2007' date is plausible as the fieldwork year (between the 2006 methods paper and 2009 results paper) but is not directly confirmed by any source found. [tier=gold indep_score=0.94 clusters=5 claim_tier=notable | framework convergence=single on PrISMA study methodology and dataset (Frigerio et al. 2006 methods paper; Frigerio et al. 2009 results paper) (upstreams: PrISMA (Progetto Italiano Salute Mentale Adolescenti) study, Frigerio et al.) — publishers independent, evidence may not be | kind=attributed eligibility=medium (extractor: attributed/high)]