To the Editor The article by Ms Buntrock and colleagues1 presented data on primary prevention of major depression in patients who did not exhibit prior depressive episodes or secondary prevention in patients who had prior depressive episodes using an online intervention. Only 6 one-hour sessions provided a substantial and sustained effect for 1 year. If a major depressive episode is already present, usually 12 to 20 individual sessions of cognitive behavioral therapy are needed to achieve response or remission,2 although fewer may also be effective.3 However, some issues should be clarified.
Anghelescu I. Online Intervention for Prevention of Major Depression. JAMA. 2016;316(8):881. doi:10.1001/jama.2016.9583