. Author manuscript; available in PMC: 2017 Jan 5.

Published in final edited form as: Psychosom Med. 2010 Dec 23;73(1):98–105. doi: 10.1097/PSY.0b013e318203310a

Table 1.

Demographic and Clinical Characteristics of the Study Sample.

	n = 161
Female	117 (73%)
Age (years)	35 (10)
QTc (msec, Fridericia correction for heart rate)	470 (33)
Heart Rate (beats per minute)	74 (14)
High Frequency Heart Rate Variability (msec²)	39 (9)
Patients with previous arrhythmogenic cardiac event
Yes	80 (49.7%)
No	80 (49.7%)
Unknown	1 (.6%)
Patients taking beta blockers	101 (63%)
Patients with Implanted Cardiac Defibrillator (ICD)	18 (11%)
Genotype
LQT1	103 (67%)
LQT2	58 (33%)

Mean (SD) reported for age, QTc, heart rate, and HF-HRV. The QTc mean and SD values were derived from the 3967 events in this study.