What this phase means
Phase 4: the treatment is already approved. This study asks new questions — longer-term effects, other diseases, or how it compares in everyday care.
Phase labels are FDA/ICH categories applied to the registry Phase field. They are not a finding that this study succeeded.
What the registry says happens
If you join, the listed intervention(s) are Positive airway pressure (PAP) therapy, Sleep dental device, or Atomoxetine-oxybutynin. The registry lists allocation as randomized. Researchers want to identify which treatments for obstructive sleep apnea (OSA) work best and are easiest for patients to use consistently.
They plan to enroll about 2,400 people at 4 sites. Taking part typically means taking a study drug (or dummy pill), using or being fitted with a device plus check-ins.
Official title (unrewritten)
Comparative Effectiveness of Positive Airway Pressure Therapy, Dental Device, and Atomoxetine-Oxybutynin for Sleep Apnea: the ADAPT-OSA Study
Interventions: Positive airway pressure (PAP) therapy, Sleep dental device, Atomoxetine-oxybutynin
Primary outcome (registry wording): Health-related quality of life