Efficacy of a Self-Hypnotic Relaxation App on Pain and Anxiety in a Randomized Clinical Trial: Results and Considerations on the Design of Active and Control Apps.

Despite an explosion of mobile app offerings for management of pain and anxiety, the evidence for effectiveness is scarce. Placebo-controlled trials are the most desirable but designing inactive placebo apps can be challenging. For a prospective randomized clinical trial with 72 patients in a craniofacial pain center, we created an app with self-hypnotic relaxation (SHR) for use with iOS and Android systems.