Global research production pertaining to gastrointestinal involvement in COVID-19: A bibliometric and visualised study

Table 1 List of the top 10 countries pertaining to gastrointestinal publications involvement in coronavirus disease 2019

Ranking	Country	No. of documents	%	Study population	Sample size	Prevalence of GI symptoms (%)	Common GI symptoms
1st	United States	278	21.94	Multicentre Cohort Study[48]	318	61.3	Loss of appetite, diarrhoea, and nausea
2nd	China	222	17.52	Retrospective study[51]	1320	14.5	Diarrhoea, anorexia, and nausea and vomiting
3rd	Italy	184	14.52	Prospective case-control study[47]	34	8.8	Diarrhoea, abdominal pain, and nausea
4th	United Kingdom	159	12.55	Prospective observational cohort study[42]	20, 133	23	Diarrhoea, nausea/vomiting, and abdominal pain
5th	Spain	61	4.81	Retrospective study[49]	76	75	Diarrhoea, nausea/vomiting, and abdominal pain
6th	France	59	4.66	Retrospective study[45]	114	2.6	Diarrhoea
7th	Germany	56	4.42	Retrospective study[43]	50	> 16	Diarrhoea, nausea/vomiting
8th	India	51	4.03	Prospective study[44]	252	10.3	anorexia, nausea, vomiting, abdominal pain
9th	Australia	37	2.92	Epidemiological study[50]	295	> 16	Diarrhoea, nausea/vomiting, and abdominal pain
10th	Iran	33	2.60	Retrospective study[46]	611	25.4	Nausea/vomiting, diarrhoea, and abdominal pain

GI: Gastrointestinal.