Internet-based CBT is a promising new approach in the treatment of depression. There have been studies which have proved its short-term effectiveness but little research into its long-term effects. A Dutch study of 301 people over the age of 50 divided them into three groups. One group received internet-based CBT, one group received group CBT and the third group was placed on a waiting list as a control group. After a year the internet-based therapy was found to be superior to the control group and as effective as group CBT.
Spek, V. ... [et al] - One-year follow-up of results of a randomized controlled clinical trial on internet-based cognitive behavioural therapy for subthreshold depression in people over 50 years Psychological Medicine May 2008, 38(5), 635-639