Research Methodology / Treatment Outcome / Adolescent / Applied Economics / Humans / Cost Effectiveness Analysis / Depressive Disorder / Cost effectiveness / Middle Aged / Quality adjusted life years / Adult / Public health systems and services research / Economic Models / Cost Benefit Analysis / Economic evaluation / Health Care Costs / Cost Effectiveness Analysis / Depressive Disorder / Cost effectiveness / Middle Aged / Quality adjusted life years / Adult / Public health systems and services research / Economic Models / Cost Benefit Analysis / Economic evaluation / Health Care Costs