Prospective study with newly diagnosed OSA. Subjective and objective sleepiness (ESS ≥ 11; PVT mean lapse ≥ 2) were assessed. African-American race, short sleep duration, chronotype, and increased proinflammatory cytokine IL-6 level were associated with sleepiness in OSA. These findings will inform future investigations determining mechanisms of sleepiness in OSA.
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