Depression interventions for individuals with coronary artery disease – Cost-effectiveness calculations from an Irish perspective

•Various effective depression interventions exist for coronary artery disease patients.•Supervised group exercise requires low costs and is very cost-effective over 8 weeks.•Antidepressant use also is very cost-effective over 8 or 26 weeks of treatment.•Cost-effectiveness of individual psychotherapy or collaborative care is lower.•Group psychotherapy (sensitivity analysis) has potential to be most cost-effective.