Koff 2006.

Methods	Randomised pilot study
Participants	40 GOLD stage III and stage IV patients with COPD
Interventions	An Internet‐based eHealth device 'the Health Buddy', spirometer, pedometer, oxygen saturation meter and other peripheral devices.
Outcomes	St George's Quality of Life Respiratory Questionnaire and costs of healthcare in US dollars, showed non significant improvement in health status and saving in costs for intervention group
Notes	Power calculations showed that a study in a larger group would be required to generate significant results