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QTc based on severity of OSA. Adjusted mean QTc values of subsequent analysis (severe OSA vs. nonsevere OSA). p value = 0.03 for severe vs. nonsevere OSA in patients with HF; p value = 0.06 for severe vs. nonsevere OSA in patients without HF. OSA = obstructive sleep apnea; HF = heart failure. ∗Patients with severe OSA. ∗∗Patients without severe OSA.
