In 2001–05, researchers at Stanford University School of Medicine conducted a randomized, controlled study of the use of an Internet Chronic Disease Self-Management Program. A total of 958 people with heart disease, chronic lung disease or type 2 diabetes participated.
Four health indicators showed statistically significant improvement at one year for study participants who used the Internet program, compared with those who received only usual medical care:
Four health behaviors showed greater improvement at six months and at one year for users of the Internet program than for participants receiving only usual care:
There were few significant differences between the group participating in the Internet intervention and participants from two similar, non-Internet, interventions using small groups in face-to-face meetings.