Written online situational feedback via mobile phone to support self-management of chronic widespread pain: a usability study of a Web-based intervention.

Background: This pretrial study aimed to develop and test the usability of a four-week Internet intervention delivered by a Web-enabled mobile phone to support self-management of chronic widespread pain.

Methods: The intervention included daily online entries and individualized written feedback, grounded in a mindfulness-based cognitive behavioral approach. The participants registered activities, emotions and pain cognitions three times daily using the mobile device.