Knowledge structure and emerging trends on osteonecrosis of the femoral head: a bibliometric and visualized study

Table 1 Top 20 most productive countries related to ONFH research

Ranking	Countries	Publications, n	% of 2594	H-index	Average citations per document
1	China	1077	41.52	45	11.61
2	USA	392	15.11	55	29.35
3	Japan	278	10.72	33	16.28
4	South Korea	167	6.44	32	19.89
5	Germany	123	4.74	27	18.29
6	UK	102	3.93	28	24.54
7	France	73	2.81	23	25.14
8	India	59	2.27	15	12.63
9	Turkey	56	2.16	13	11.84
10	Italy	49	1.89	20	19.69
11	Greece	47	1.81	23	26.72
12	Canada	41	1.58	19	28.2
13	Switzerland	36	1.39	15	34.31
14	Belgium	31	1.20	18	36.13
15	Australia	27	1.04	12	27.52
16	Spain	27	1.04	10	11.85
17	Israel	24	0.93	12	38.13
18	Brazil	22	0.85	8	10.45
19	Austria	20	0.77	11	22.75
20	Iran	20	0.77	7	10.45

ISSN: 1749-799X