Common symptoms such as dizziness, headache, olfactory dysfunction, nausea, vomiting,
etc. in COVID-19 patients have indicated the involvement of the nervous system. However,
the exact association of the nervous system with COVID-19 infection is still unclear.
Thus, we have conducted a meta-analysis of clinical studies associated with neurological
problems in COVID-19 patients. We have searched for electronic databases with MeSH
terms, and the studies for analysis were selected based on inclusion and exclusion
criteria and quality assessment. The Stats Direct (version 3) was used for the analysis.
The pooled prevalence with 95% confidence interval of various neurological
manifestations reported in the COVID-19 patients was found to be headache 14.6%
(12.2–17.2), fatigue 33.6% (29.5–37.8), olfactory dysfunction 26.4%
(21.8–31.3), gustatory dysfunction 27.2% (22.3–32.3), vomiting 6.7%
(5.5–8.0), nausea 9.8% (8.1–11.7), dizziness 6.7% (4.7–9.1),
myalgia 21.4% (18.8–24.1), seizure 4.05% (2.5–5.8), cerebrovascular
diseases 9.9% (6.8–13.4), sleep disorders 14.9% (1.9–36.8), altered mental
status 17.1% (12.3–22.5), neuralgia 2.4% (0.8–4.7), arthralgia 19.9%
(15.3–25.0), encephalopathy 23.5% (14.3–34.1), encephalitis 0.6%
(0.2–1.3), malaise 38.3% (24.7–52.9), confusion 14.2% (6.9–23.5),
movement disorders 5.2% (1.7–10.4), and Guillain–Barre syndrome 6.9%
(2.3–13.7). However, the heterogeneity among studies was found to be high.
Various neurological manifestations related to the central nervous system (CNS) and
peripheral nervous system (PNS) are associated with COVID-19 patients.