Table 2 Comparing baseline demographic, clinical and ECG-derived variables between SQTS susceptible subjects with those with QTc > 370 ms.

From: A descriptive report on short QT interval in Kherameh branch of the PERSIAN cohort study

 

SQTS susceptible

(n = 72 (1.65%))

QTc > 370 ms

(n = 4291 (98.45%))

p

Age, year (mean ± SD) [range]

51.56 ± 8.41 [40–72]

52.61 ± 8.08 [40–72]

0.788‡

Male/female ratio

1/.26

1/1.145

 < 0.0001†

Heart rate (mean ± SD; median [IQR]) [range]

58.389 ± 9.787; 58 [7.5] [41–84]

70.899 ± 11.775; 70 [15] [40–134]

 < 0.0001‡

QTc, ms (mean ± SD; median [IQR]) [range]

360.72 ± 11.72; 365 [10.75] [318–369]

423.24 ± 29.54; 422 [32] [370–768]

 < 0.0001‡

Past medical history [frequency (%)]

CVDs

11 (15.3)

425 (9.9)

0.100†

Myocardial infarction

6 (8.3)

100 (2.3)

0.008†

Epilepsy

0 (0)

45 (1.0)

1.000†

Chronic headache

1 (1.4)

131 (3.1)

0.726†

  1. CVDs (cardiovascular diseases), SD (standard deviation), ECG (electrocardiogram), IQR (interquartile range), p (p-value).
  2. †Fisher’s Exact test; ‡Independent t-test.
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