Table 1.

Characteristics of included radiological journals

Characteristics	All, (N = 189)	Present, (N = 83)	Not present, (N = 106)	p value
2022 JIF, mean ± SD, median (range)	3.0 ± 2.6, 2.4 (0.10–19.7)	3.6 ± 2.9, 3.1 (0.3–19.7)	2.5 ± 2.1, 2.1 (0.1–10.6)	0.002
Citable items, mean ± SD, median (range)	131.1 ± 127.4, 87.0 (9.0–902.0)	154.8 ± 156.3, 95.0 (16.0–902.0)	112.7 ± 96.0, 83.5 (9.0–450.0)	0.033
Total citations, mean ± SD, median (range)	6136.3 ± 12,436.3, 1828.0 (13.0–129,835.0)	8395.0 ± 16,707.2, 2624.0 (63.0–120,835.0)	4367.7 ± 7191.3, 1381.5 (13.0–3464.0)	0.043
JIF quartile, n (%)				0.162
n.a.	64 (33.9)	24 (28.9)	40 (37.7)
Q1	33 (17.5)	20 (24.1)	13 (12.3)
Q2	35 (18.5)	17 (20.5)	18 (17.0)
Q3	32 (16.9)	14 (16.9)	18 (17.0)
Q4	25 (13.2)	8 (9.6)	17 (16.0)
Publisher, n (%)				< 0.001
Springer and BMC	43 (22.8)	15 (18.1)	28 (26.4)
Elsevier	42 (22.2)	39 (47.0)	3 (2.8)
Society	26 (13.8)	10 (12.0)	16 (15.1)
Wiley and Hindawi	16 (8.5)	4 (4.8)	12 (11.3)
Lippincott Williams & Wilkins	13 (6.9)	1 (1.2)	12 (11.3)
Others	49 (25.9)	14 (16.9)	35 (33.0)
Region, n (%)				0.234
North America	88 (46.6)	42 (50.6)	46 (43.4)
Europe	74 (39.2)	34 (41.0)	40 (37.7)
Asia	24 (12.7)	6 (7.2)	18 (17.0)
Africa	3 (1.6)	1 (1.2)	2 (1.9)
Publication frequency, n (%)				0.736
< 6 issue/year	84 (44.4)	39 (47.0)	45 (42.5)
6–12 issue/year	53 (28.0)	21 (25.3)	32 (30.2)
≥ 12 issue/year	52 (27.5)	23 (27.7)	29 (27.4)
Publishing model, n (%)				0.852
Hybrid	117 (61.9)	52 (62.7)	65 (61.3)
Open	72 (38.1)	31 (37.3)	41 (38.7)
Only in radiology category, n (%)				0.359
Yes	114 (60.3)	47 (56.6)	67 (63.2)
No	75 (39.7)	36 (43.4)	39 (36.8)
Official journal, n (%)				0.640
Yes	131 (69.3)	59 (71.1)	72 (67.9)
No	58 (30.7)	24 (28.9)	34 (32.1)

JIF journal impact factor, n.a. not applicable, Q1–Q4 the first to the fourth JIF quartile, SD standard deviation