Prolonged QT dispersion in inflammatory bowel disease

Table 2 Characteristics of patients with ulcerative colitis, and the relationship between QT prolongation n (%)

	UC QT prolongation		Test values
	-	+	χ2	P value
Diagnosis period (yr)	44.13 ± 42.60	45.67 ± 47.99		0.86
Family history			0.48	0.78
None	41 (77.4)	6 (66.7)
UC	8 (15.1)	2 (22.2)
Colon cancer	4 (7.5)	1 (11.1)
Operation			0.17	0.67
Yes	1 (1.9)	-
No	52 (98.1)	9 (100)
Extent of disease			3.49	0.32
Rectosigmoid	16 (30.18)	2 (22.22)
Left sided colon	10 (18.86)	4 (44.4)
Extensive	6 (11.32)	-
Pancolitis	21 (39.62)	3 (33.3)
Clinical activity			2.19	0.33
TW1 (mild activity)	34 (64.15)	8 (88.89)
TW2 (moderate activity)	17 (32.07)	1 (11.11)
TW3 (severe activity)	3.77	-
Drug use			0.09	0.75
Used	45 (84.9)	8 (88.89)
Not used	8 (15.09)	1 (11.11)
5-ASA			0.19	0.65
Used	9 (16.98)	1 (11.11)
Not used	44 (83.01)	8 (88.89)
CS			1.12	0.28
Used	47 (88.67)	9 (100)
Not used	6 (11.32)	-
IS			0.13	0.71
Used	49 (92.45)	8 (88.89)
Not used	4 (7.54)	1 (11.11)
Smoking			2.99	0.22
Yes	12 (22.64)	2 (22.2)
No	26 (49.05)	2 (22.2)
Quit	15 (28.30)	5 (55.56)
Alcohol
Yes	9 (16.98)	2 (22.2)	0.46	0.79
No	42 (79.24)	7 (77.78)
Quit	2 (3.77)	-

χ² test, Mann-Whitney U test. TW: Truelove-Witts clinical activity index; UC: Ulcerative colitis; 5-ASA: 5-aminosalicylic acid; CS: Corticosteroid; IS: Immunosuppressive.