Table 1.

Clinical and ECG parameters of study cohorts

Parameter	ERP group	Control group	Brugada-type ECG pattern group	Pa
N (%)	119 (22%)	412 (76.3%)	9 (1.7%)
Male gender (n, %)	98, 82.3%	243, 58.9%	7, 77.7%	0.000
Age (years)	18.2 ± 2.3	18.1 ± 2.9	19.3 ± 1	0.6
Body area (m²)	1.78 ± 0.23	1.72 ± 0.19	1.77 ± 0.16	0.009
Weight (kg)	66.7 ± 12.4	62.7 ± 12.1	65 ± 9.9	0.002
Height (cm)	172.7 ± 19	171.6 ± 9	174.1 ± 7.9	0.375
Systolic BP (mmhg)	116 ± 12	115 ± 11	120 ± 18	0.81
Diastolic BP (mmhg)	70 ± 9	68 ± 10	74 ± 9	0.136
RR (ms)	867 ± 157	781 ± 145	815 ± 218	0.000
PR interval (ms)	143 ± 16	143 ± 21	145 ± 13	0.76
QRS interval (ms)	86 ± 10	89 ± 11	90 ± 13	0.005
QRS axis (°)	68 ± 25	67 ± 27	58 ± 26	0.9
T axis (°)	58 ± 18	55 ± 20	56 ± 7.5	0.19
P axis (°)	56 ± 25	56 ± 26	65 ± 10	0.97
P wave duration (ms)	94 ± 12	94 ± 12	98 ± 10	0.8
QRS amplitude DII (mV)	1.6 ± 0.4	1.4 ± 0.4	1.4 ± 0.7	0.000
P wave amplitude DII (mV)	0.14 ± 0.05	0.15 ± 0.05	0.160.04	0.2
T wave amplitude DII (mV)	0.48 ± 0.17	0.39 ± 0.18	0.32 ± 0.11	0.000
QT interval DII or V5 (ms)	389 ± 48	370 ± 27	366 ± 40	0.000
QT interval V2 or V3 (ms)	383 ± 38	370 ± 35	367 ± 37	0.001
Fridericia c-QT DII or V5 (ms)	405 ± 20	405 ± 27	394 ± 31	0.9
Fridericia c-QT V2 or V3 (ms)	403 ± 35	405 ± 37	396 ± 24	0.6
Framingham c-QT DII or V5 (ms)	405 ± 20	405 ± 27	394 ± 28	0.6
Framingham c-QT V2 or V3 (ms)	404 ± 33	404 ± 31	396 ± 24	0.8
Tpeak-Tend DII or V5 (ms)	88 ± 9	85 ± 10	82 ± 12	0.007
Tpeak-Tend V2 or V3 (ms)	103 ± 14	97 ± 14	95 ± 12	0.000
Tpeak-Tend/QT V2 or V3 ratio	0.26 ± 0.03	0.26 ± 0.07	0.25 ± 0.03	0.8
Tpeak-Tend/QT Dii or V5 ratio	0.22 ± 0.02	0.23 ± 0.02	0.22 ± 0.02	0.4

Note:

^aP value calculated between ERP group and control group.

Abbreviations: BP, blood pressure; c-QT, corrected QT interval; ECG, electrocardiogram; ERP, early repolarization pattern.