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Authors’ affiliation
|
Total
|
p value*
|
|---|
|
Outside
|
Collaboration
|
Inside
|
|---|
|
Total
|
–
|
157 (100%)
|
115 (100%)
|
115 (100%)
|
387 (100%)
|
–
|
|
Journal impact factor (JIF)
|
JIF < 2
|
52 (33.1%)
|
45 (39.1%)
|
79 (68.7%)
|
176 (45.5%)
|
< 0.0001
|
|
2 ≤ JIF < 4
|
62 (39.5%)
|
44 (38.3%)
|
26 (22.6%)
|
132 (34.1%)
|
|
JIF ≥ 4
|
43 (27.4%)
|
26 (22.6%)
|
10 (8.7%)
|
79 (20.4%)
|
|
Yearly number of citations (n)
|
n < 10
|
64 (40.8%)
|
74 (64.3%)
|
83 (72.2%)
|
221 (57.1%)
|
< 0.0001
|
|
10 ≤ n < 50
|
72 (45.9%)
|
35 (30.4%)
|
32 (27.8%)
|
139 (35.9%)
|
|
50 ≤ n < 100
|
12 (7.6%)
|
4 (3.5%)
|
0 (0.0%)
|
16 (4.1%)
|
|
n ≥ 100
|
9 (5.7%)
|
2 (1.7%)
|
0 (0.0%)
|
11 (2.8%)
|
|
Journal access
|
Open
|
59 (37.6%)
|
55 (47.8%)
|
74 (64.3%)
|
188 (48.6%)
|
< 0.0001
|
|
Hybrid
|
80 (51.0%)
|
56 (48.7%)
|
39 (33.9%)
|
175 (45.2%)
|
|
Non-open
|
18 (11.5%)
|
4 (3.5%)
|
2 (1.7%)
|
24 (6.2%)
|
|
Systematic review geographical coverage
|
Country-specific
|
18 (11.5%)
|
30 (26.1%)
|
43 (37.4%)
|
91 (23.5%)
|
< 0.0001
|
|
Global/multiple regions
|
85 (54.1%)
|
19 (16.5%)
|
13 (11.3%)
|
117 (30.2%)
|
|
Middle East and North Africa/ Arab world
|
21 (13.4%)
|
23 (20.0%)
|
29 (25.2%)
|
73 (18.9%)
|
|
Middle East/ Asia/ Gulf Cooperation Council
|
24 (15.3%)
|
22 (19.1%)
|
23 (20.0%)
|
69 (17.8%)
|
|
North Africa/ East Africa/ Africa
|
9 (5.7%)
|
21 (18.3%)
|
7 (6.1%)
|
37 (9.6%)
|
|
Systematic review health topic
|
Alcohol, substance, and nicotine abuses
|
11 (7.0%)
|
2 (1.7%)
|
5 (4.3%)
|
18 (4.7%)
|
NS
|
|
Cardiovascular disease
|
7 (4.5%)
|
6 (5.2%)
|
4 (3.5%)
|
17 (4.4%)
|
|
Diabetes
|
7 (4.5%)
|
8 (7.0%)
|
6 (5.2%)
|
21 (5.4%)
|
|
Other metabolic syndromes
|
5 (3.2%)
|
7 (6.1%)
|
3 (2.6%)
|
15 (3.9%)
|
|
Genetics
|
1 (0.6%)
|
3 (2.6%)
|
5 (4.3%)
|
9 (2.3%)
|
|
Infectious disease
|
46 (29.3%)
|
46 (40.0%)
|
41 (35.7%)
|
133 (34.4%)
|
|
Mental health
|
8 (5.1%)
|
12 (10.4%)
|
8 (7.0%)
|
28 (7.2%)
|
|
Nutrition
|
8 (5.1%)
|
1 (0.9%)
|
5 (4.3%)
|
14 (3.6%)
|
|
Cancer
|
12 (7.6%)
|
4 (3.5%)
|
12 (10.4%)
|
28 (7.2%)
|
|
Other
|
41 (26.1%)
|
24 (20.9%)
|
23 (20.0%)
|
88 (22.7%)
|
|
Trauma/Injury/Violence
|
11 (7.0%)
|
2 (1.7%)
|
3 (2.6%)
|
16 (4.1%)
|
- *p-value of the Fisher’s exact test. Association statistical significance threshold at 0.05 was corrected using Bonferroni method to address multiple testing problem. As we conducted 29 tests, significance threshold was at 0.0017. NS: not significant
