While preventive efforts for depression have tended to focus on adolescent and young adult populations, other stages of the lifespan also provide opportunities for prevention. With older people, there are certain risk and aetiological factors, which become more prominent and require preventive action at that point in the lifespan. The aim of this study is to determine the efficacy of various interventions in preventing depression and cognitive decline among older people who are at high risk of developing major depression because they are currently suffering from depressive symptoms.