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Effect of supplemental oxygen on sleep. Apnea-related arousals were reduced with supplemental oxygen, while basic sleep architecture remained unaffected. Long apneas (AOP) ended more often with arousal on supplemental oxygen. AOP, apnea of prematurity; REM, rapid-eye movement sleep; Base, baseline PSG results on room air; O2, PSG results during supplemental oxygen; TST, total sleep time; Q1, 1st quartile; Q3, 3rd quartile.
