Table 1.

Correlation analysis between sympathetic skin response (SSR) latencies and cross-sectional area (CSA) of the vagus nerve.

	Variable	Spearman’s correlation (r)	p value	Spearman’s correlation (r)	p value
		Right		Left
CONTROLS	SSR palmar latencies versus CSA VN	0.338	−0.226	0.4	−0.199
	SSR plantar latencies versus CSA VN	0.185	−0.309	0.366	−0.214
NONPCS	SSR palmar latencies versus CSA VN	0.338	−0.226	0.400	−0.199
	SSR plantar latencies versus CSA VN	0.185	−0.309	0.366	−0.214
PCS	SSR palmar latencies versus CSA VN	0.312	−0.238	0.507	−0.158
	SSR plantar latencies versus CSA VN	0.050	−0.444	0.502	−0.159
NONPCS	SSR palmar latencies versus CSA VN	0.338	−0.226	0.400	−0.199
	SSR plantar latencies versus CSA VN	0.185	−0.309	0.366	−0.214

CSA, cross-sectional area; NONPCS, non-post-COVID; PCS, post-COVID syndrome; SSR, sympathetic skin response; VN, vagus nerve.