Can the change of vasomotor activity in irritable bowel syndrome patients be detected via color Doppler ultrasound?

Table 1 Brachial artery flow measurements before and after stimulation according to ırritable bowel syndrome and control groups

	Pre-stimulation flow rate (mL/min), mean ± SD	Post-stimulation flow rate (mL/min), mean ± SD	P value
IBS (n = 29)	60.2 ± 28.8	78.1 ± 42.5	0.002
Control (n = 29)	77.5 ± 36.5	39.7 ± 19.1	< 0.001
P value	0.05	< 0.001

IBS: Irritable bowel syndrome.

Table 2 Brachial artery diameter measurements before and after stimulation according to IBS and control groups

	Diameter before stimulus (mm), mean ± SD	Diameter after stimulus (mm), mean ± SD	P value
IBS	3.4 ± 0.5	3.7 ± 0.5	0.01
Control	3.4 ± 0.5	2.8 ± 0.6	< 0.001
P value	0.92	< 0.001

IBS: Irritable bowel syndrome.

Table 3 Changes in brachial artery flow and diameter with stimulation

	Flow difference before and after stimulus (mL/min), median (25P-75P)	Diameter difference before and after stimulus (mm), median (25P-75P)
IBS	9.10 (0.00-33.70)	0.20 (0.00-0.40)
Control	-33.00 (-42.50 to -24.20)	-0.50 (-0.90 to -0.40)
P value	< 0.001	< 0.001

IBS: Irritable bowel syndrome; P: Percentile.

Table 4 The difference in flow rate between ırritable bowel syndrome and the control group before and after stimulation, according to gender

		The difference in flow rate between before and after a stimülation (mL/min), median (25P-75P)	P value
Female	IBS (n = 15)	11.90 (0.00-35.70)	< 0.001
	Control (n = 15)	-25.50 (-39.40 to -21.60)
Male	IBS (n = 14)	6.55 (-0.60-25.50)	< 0.001
	Control (n = 14)	-39.75 (-58.90 to -32.00)

IBS: Irritable bowel syndrome; P: Percentile.

Table 5 Diameter difference before and after stimulation between ırritable bowel syndrome and control groups according to sex

		The difference in diameter between before and after a stimulation (mm), median (25P-75P)	P value
Female	IBS (n = 15)	0.20 (0.00-0.40)	< 0.001
	Control (n = 15)	-0.50 (-1.00 to -0.30)
Male	IBS (n = 14)	0.30 (0.00-0.50)	< 0.001
	Control (n = 14)	-0.60 (-0.90 to -0.40)

IBS: Irritable bowel syndrome; P: Percentile.