Table 2.

Comparison of age and VN diameter between the PD and control groups.

		PD group (n = 20)	Control group (n = 20)	p value
Age, years	Median	65.5	66.5	0.620
	IQR	58.3–76.0	60.5–76.3
	95% CI	62.71–71.29	63.99–71.51
Average VN diameter, mm	Mean	1.17	1.13	0.353
	95% CI	1.10–1.24	1.07–1.18
Narrower VN diameter, mm	Mean	1.11	1.07	0.421
	95% CI	1.02–1.20	1.02–1.13

CI, confidence interval; IQR, interquartile range; PD, Parkinson's disease; SD, standard deviation; VN, vagus nerve.