Table 5.

Univariate analysis of dichotomy risk factors of long QT syndrome

Variable	OR (95% CI) for LQTS	p value
QT-prolonging drugs users	2.51 (0.91–6.93)	0.069
> 1 QT-prolonging drug users	1.87 (1.06–3.31)	0.029
> 2 QT-prolonging drugs users	2.18 (1.26–3.76)	0.005
Chronic QT-prolonging drugs users	2.29 (1.25–4.18)	0.006
List 1 drugs users	1.50 (0.85–2.62)	0.157
List 2 drugs users	2.02 (0.88–4.65)	0.092
List 3 drugs users	1.68 (0.77–3.66)	0.188
Male sex	2.16 (1.26–3.68)	0.004
Bradycardia	0.96 (0.42–2.17)	0.915
Hypokalemia	1.40 (0.59–3.34)	0.450
Hypocalcemia	2.06 (1.14–3.71)	0.015
Hypomagnesemia	1.81 (0.69–4.77)	0.222
Hypercreatininemia	1.64 (0.96–2.78)	0.068
Hypertension	1.25 (0.73–2.17)	0.414
Hypothyroidism	3.84 (1.39–10.64)	0.006
Type 2 diabetes mellitus	1.21 (0.66–2.20)	0.532
Acute coronary syndrome	3.52 (0.31–39.35)	0.556
Dilated cardiomyopathy/heart failure	3.35 (1.58–7.09)	0.001
Chronic ischemic cardiopathy	1.65 (0.85–3.21)	0.138
Left ventricular hypertrophy	1.66 (0.89–3.09)	0.108

CI confidence interval, LQTS long QT syndrome, OR odds ratio