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(A) Simplified illustration of the protocol for participants randomized to the lab-based trial arm. (B) Simplified illustration of the protocol for participants randomized to the home-based trial arm. *Decisions for split, repeat, or cross-back studies per protocol for negative or unacceptable studies. AHI, apnea-hypopnea index; PSG, polysomnography; CPAP, continuous positive airway pressure; PAP positive airway pressure; APAP, autotitrating positive airway pressure.
