2019 bar highlighted as the original RCT benchmark year.
Left: 4-week treatment phase (averaged across all years). Right: sustained follow-up (2019 & 2023 average).
DALY calculation: Depression disability weight = 0.396, anxiety = 0.149 (WHO GBD 2021). Episode duration averted = 6 months (standard) / 4 months (conservative). DALYs averted per youth = recovery_rate × disability_weight × duration. Cost per DALY = cost per youth ÷ DALYs averted. WHO-CHOICE threshold for Kenya: <$2,170/DALY = highly cost-effective. Cost per recovery = cost per youth ÷ recovery rate (proportion below clinical threshold at endpoint).