Daytime QT by Routine 12-Lead ECG Is Prolonged in Patients with Severe Obstructive Sleep Apnea

Table 4

QTc based on severity of OSA (severe vs. nonsevere).

Variable	Severe OSA (95% confidence limits)	Nonsevere OSA (95% confidence limits)	value
QTc (ms, unadjusted)	444.4 (438.71-450.09)	433.48 (428.62-438.33)	0.0044
QTc (ms, adjusted)	450.89 (444.13-457.65)	439.86 (433.85-445.87)	0.0051

Mean QTc values of subsequent analysis based on dichotomous groups (severe OSA, nonsevere OSA). Nonsevere OSA includes normal-mild and moderate OSA. OSA = obstructive sleep apnea. Severe compared to nonsevere OSA.