Research landscape on COVID-19 and liver dysfunction: A bibliometric analysis

Table 1 The top 10 countries contributing to research related to coronavirus disease 2019 and liver

Ranking	Country	No. of documents	%
1st	United States	497	21.28
2nd	China	393	16.82
3rd	Italy	255	10.92
4th	India	185	7.92
5th	United Kingdom	170	7.28
6th	Spain	125	5.35
7th	Germany	107	4.58
8th	Iran	97	4.15
9th	France	74	3.17
9th	Turkey	74	3.17

Table 2 The top 10 institutions contributing to research related to coronavirus disease 2019 and liver

Ranking	Institute	Country	No. of documents	%
1st	Huazhong University of Science and Technology	China	55	2.35
2nd	Tongji Medical College	China	53	2.27
3rd	Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas	Spain	48	2.05
4th	INSERM	France	36	1.54
4th	University of Pennsylvania	United States	36	1.54
6th	Yale School of Medicine	United States	31	1.33
7th	Hospital Clinic Barcelona	Spain	30	1.28
8th	AP-HP Assistance Publique - Hopitaux de Paris	France	29	1.24
8th	Zhejiang University School of Medicine	China	29	1.24
10th	Universitat de Barcelona	Spain	26	1.11

Table 3 Top 10 active journals publishing research related to coronavirus disease 2019 and liver

Ranking	Journal/source title	No. of documents	%	IF1
1st	Journal of Hepatology	85	3.64	30.083
2nd	Liver International	64	2.74	8.754
3rd	World Journal of Gastroenterology	62	2.65	5.374
4th	Hepatology	50	2.14	17.298
5th	Hepatology Communications	37	1.58	5.701
6th	Clinical Gastroenterology and Hepatology	36	1.54	13.576
7th	Liver Transplantation	34	1.46	6.112
7th	World Journal of Hepatology	34	1.46	NA
9th	World Journal of Clinical Cases	32	1.37	1.534
10th	Journal of Clinical and Experimental Hepatology	31	1.33	NA

¹Impact factors were retrieved from the 2021 Journal Citation Reports (Clarivate Analytics).

Table 4 Top 10 articles on total citations for research related to coronavirus disease 2019 and liver from 2020 to 2022

Ranking	Ref.	Title	Year	Source title	Cited by	Impact index per article1
1st	Zhang et al[13]	Liver injury in COVID-19: Management and challenges	2020	The Lancet Gastroenterology and Hepatology	1126	394.7
2nd	Mao et al[51]	Manifestations and prognosis of gastrointestinal and liver involvement in patients with COVID-19: A systematic review and meta-analysis	2020	The Lancet Gastroenterology and Hepatology	549	181
3rd	Cai et al[48]	COVID-19: Abnormal liver function tests	2020	Journal of Hepatology	542	177
4th	Xu et al[53]	Liver injury during highly pathogenic human coronavirus infections	2020	Liver International	522	186
5th	Fan et al[49]	Clinical Features of COVID-19-Related Liver Functional Abnormality	2020	Clinical Gastroenterology and Hepatology	460	156.7
6th	Wang et al[52]	SARS-CoV-2 infection of the liver directly contributes to hepatic impairment in patients with COVID-19	2020	Journal of Hepatology	347	117.7
7th	Boettler et al[47]	Care of patients with liver disease during the COVID-19 pandemic: EASL-ESCMID position paper	2020	JHEP Reports	326	88.7
8th	Ji et al[50]	Nonalcoholic fatty liver diseases in patients with COVID-19: A retrospective study	2020	Journal of Hepatology	314	112
9th	Zhang et al[54]	Liver impairment in COVID-19 patients: A retrospective analysis of 115 cases from a single center in Wuhan city, China	2020	Liver International	289	97.7
10th	Bangash et al[46]	COVID-19 and the liver: Little cause for concern	2020	The Lancet Gastroenterology and Hepatology	283	90.7

¹The Impact Index Per Article is presented based on Reference Citation Analysis (Source: Baishideng Publishing Group Inc. Pleasanton, CA 94566, United States). COVID-19: Coronavirus disease 2019.