Table 3.

Relationship between QTd and QTcd and smoking and sociodemographic characteristics (N=250)

Characteristics		QTd	QTcd
Age	Spearman rho	0.111	0.093
	p	0.081	0.142
BMI	Spearman rho	0.162	0.163
	p	0.010*	0.010*
Gender	Female	21.22 (12.12)	23.67 (13.6)
	Male	25.43 (13.48)	28.44 (15.6)
	pa	0.009*	0.013*
Total amount of smoking (pack/years)	Spearman rhoc	0.328	0.312
	p	<0.001*	<0.001*
Cigarettes per day	≤10	10.27±4.38	11.67±4.81
	11–20	20.11±11.54	22.44±13.4
	21–30	26.34±12.41	29.73±14.7
	≥31	29.11±13.89	32.13±15.41
	pb	<0.001*	<0.001*
	Spearman rho	0.396	0.388
FTND scores	Spearman rhoc	0.539	0.547
	p	<0.001*	<0.001*
Exhaled CO levels	Spearman rhoc	0.837	0.838
	p	<0.001*	<0.001*
Alcohol use	No	22.89±13.06	25.63±15.03
	Yes	26.4±13.01	29.34±14.77
	pa	0.040*	0.048*

Data presented as Mean±SD.

^aMann-Whitney U test.

^bKruskal-Wallis test Pearson correlation analysis.

^cSpearman rho correlation analysis.

^*Indicates statistical significance.

BMI: body mass index (kg/m²). CO: carbon monoxide. FTND: Fagerström test for nicotine dependence. QTd: QT dispersion. QTcd: corrected QT dispersion.