Mapping the evolution of liver aging research: A bibliometric analysis

Table 1 The top 10 most productive countries

Rank	Country	Publications	Frequency	TC	AC	SCP	MCP	Ratio
1	United States	1008	0.251	55205	54.77	794	214	0.212
2	China	820	0.2042	16228	19.79	674	146	0.178
3	Japan	428	0.1066	14259	33.32	366	62	0.145
4	Italy	205	0.051	6551	31.96	150	55	0.268
5	Spain	167	0.0416	6774	40.56	125	42	0.251
6	Korea	153	0.0381	3826	25.01	109	44	0.288
7	Germany	152	0.0378	6511	42.84	90	62	0.408
8	United Kingdom	140	0.0349	8635	61.68	87	53	0.379
9	France	119	0.0296	9485	79.71	91	28	0.235
10	India	84	0.0209	1712	20.38	71	13	0.155

Frequency: Number of articles published per country/total number of articles published. Total number of articles published is 4016 (among the total 4288 published articles, 272 articles lack the information of countries). TC: Total citations; AC: Average citations; SCP: Single country publication; MCP: Multiple country publication; Ratio: Multiple country publication/publications.