Table 1. Summary of reported cases of central nervous system (CNS) complications of COVID-19.

	Mao et al. [6]	Helms et al. [7]	Yin et al. [22]	Giacomelli et al. [19]	Bagheri et al. [20]	Yan et al. [25]
Study design	Retrospective	Prospective	Retrospective	Cross-sectional	Cross-sectional	Cross-sectional
Number of patients	214	58	106	59	10069	59
Mean age (years)	52.7	63	72	60	32.5	45
Headache	13.1%	-	7.5%	3.4%	-	66.1%
Dizziness	18.8%	-	8.5%	-	-
Impaired consciousness	14.8%	-	16%	-	-
Hyposmia	5.1%	-	-	5.1%	76.2% (sudden) 60.9% (progressive)	68%
Hypogeusia	5.6%	-	-	10.2%		71%
Both hyposmia and hypogeusia	-	-	-	18.6%	83.3%
Skeletal muscle injury/myalgia	19.3%	-	24.5%	-	-	63%
Agitation	-	69%	-	-	-	-
Confusion	-	65%	-	-	-	-
Corticospinal tract sign	-	67%	-	-	-	-