TABLE 1.

Overview of included studies

Study name	Study location	Study period	Population	No. of COVID‐19 patients	No. of GBSs COVID‐19 patients	Controls (yes/no)
Cohorts
Espíndola et al. [45]	Brazil	April–June 2020	Neurological admissions	58	6	No
Filosto et al. [4]	Italy	March–April 2020	COVID‐19 patients	NR	30	Yes
			General hospital admissions	12711
Foresti et al. [39]	Bergamo, Italy	23 February–21 May 2020	General hospital admissions	1832	17	No
Fragiel et al. [24]	Spain	1 March–30 April 2020	COVID‐19 patients	71904	11	Yes
Guilmot et al. [46]	Brussels, Belgium	23 March–24 April 2020	General hospital admissions	349	3	No
			Neurological admissions	15
Keddie et al. [5]	London, UK	1 March–27 April 2020	COVID‐19 patients	NR	25	Yes
Koh et al. [47]	Singapore	19 March–19 July 2020	COVID‐19 patients	47572	1	No
			Neurological admissions	39
Kushwaha et al. [48]	India	April–July 2020	Neurological admissions	14	1	No
Meppiel et al. [49]	France	16 March–27 April 2020	Neurological admissions	222	15	No
Paterson et al. [50]	London, UK	9 April–15 May 2020	Neurological admissions	43	7	No
Romero‐Sánchez et al. [51]	Albacete, Spain	1 March–1 April 2020	General hospital admissions	841	1	No
Case series
Abolmaali et al. [52]	Iran	April 2020	NR	NR	3	No
Garnero et al. [53]	Italy	15 February–3 May 2020	NR	NR	6	Yes
Gigli et al. [3]	Italy	1 March–15 April 2020	NR	NR	1	Yes
Lascano et al. [54]	Switzerland	March–April 2020	NR	NR	3	No
Manganotti et al. [55]	Italy	March–April 2020	NR	NR	5	No
Nanda et al. [56]	India	NR	NR	NR	4	No
Toscano et al. [57]	Italy	Study period	General hospital admissions	1200	5	No

Abbreviations: COVID‐19, coronavirus disease 2019; GBSs, Guillain−Barré syndrome spectrum; NR, not reported.