Table 1. Characteristics of included journals (n = 188).
| Journal characteristics | Number of journals (%) or median (P25–P75)a |
|---|---|
| Geographical region of publication | |
| North America | 96 (51.1) |
| Europe without UK | 49 (26.1) |
| UK | 29 (15.4) |
| Othersb | 14 (7.4) |
| Language | |
| English | 174 (92.6) |
| Not Englishc | 14 (7.4) |
| Publisher | |
| Elsevier | 44 (23.4) |
| Springer | 24 (12.8) |
| Lippincott Williams & Wilkins | 17 (9.0) |
| Wiley | 16 (8.5) |
| Othersd | 87 (46.3) |
| Start year | 1,989 (1,969–1,999) |
| Impact Factor 2018 | 1.909 (1.159–2.998) |
| Total Cites 2018 | 3,124 (1,131–7,849) |
| Journal size e | 121 (66–238) |
Notes:
a
P25–P75: The 25th percentile to 75th percentile.
b
Others: including Asia and Africa.
c
Not English: including French, German, Spanish and Turkish.
d
Others: The minority percentage of the publishers.
e
Journal size: Citable items of journal in JCR 2018.