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Table 2 Journal impact factors analysis

From: The state of population health research performance in the Middle East and North Africa: a meta-research study

  Journal impact factor (JIF) Total p value*
JIF < 2 2 ≤ JIF < 4 JIF ≥ 4
Total 176 (100%) 132 (100%) 79 (100%) 387 (100%)
Yearly number of citations (n) n < 10 139 (79.0%) 68 (51.5%) 14 (17.7%) 221 (57.1%) < 0.0001
10 ≤ n < 50 37 (21.0%) 55 (41.7%) 47 (59.5%) 139 (35.9%)
50 ≤ n < 100 0 (0.0%) 9 (6.8%) 7 (8.9%) 16 (4.1%)
n ≥ 100 0 (0.0%) 0 (0.0%) 11 (13.9%) 11 (2.8%)
Journal access Open 108 (61.4%) 59 (44.7%) 21 (26.6%) 188 (48.6%) < 0.0001
Hybrid 59 (33.5%) 71 (53.8%) 45 (57.0%) 175 (45.2%)
Non-open 9 (5.1%) 2 (1.5%) 13 (16.5%) 24 (6.2%)
Publisher Non-commercial 114 (64.8%) 54 (40.9%) 41 (51.9%) 209 (54.0%) < 0.0001
Commercial 62 (35.2%) 78 (59.1%) 38 (48.1%) 178 (46.0%)
Systematic review geographical coverage Country-specific 62 (35.2%) 21 (15.9%) 8 (10.1%) 91 (23.5%) < 0.0001
Global/multiple regions 31 (17.6%) 42 (31.8%) 44 (55.7%) 117 (30.2%)
Middle East and North Africa/ Arab world 35 (19.9%) 31 (23.5%) 7 (8.9%) 73 (18.9%)
Middle East/ Asia/ Gulf Cooperation Council 37 (21.0%) 25 (18.9%) 7 (8.9%) 69 (17.8%)
North Africa/ East Africa/ Africa 11 (6.3%) 13 (9.8%) 13 (16.5%) 37 (9.6%)
Systematic review health topic Alcohol, substance, and nicotine abuses 12 (6.8%) 5 (3.8%) 1 (1.3%) 18 (4.7%) NS
Cardiovascular disease 8 (4.5%) 8 (6.1%) 1 (1.3%) 17 (4.4%)
Diabetes 6 (3.4%) 12 (9.1%) 3 (3.8%) 21 (5.4%)
Other metabolic syndromes 8 (4.5%) 3 (2.3%) 4 (5.1%) 15 (3.9%)
Genetics 2 (1.1%) 3 (2.3%) 4 (5.1%) 9 (2.3%)
Infectious disease 48 (27.3%) 49 (37.1%) 36 (45.6%) 133 (34.4%)
Mental health 18 (10.2%) 8 (6.1%) 2 (2.5%) 28 (7.2%)
Nutrition 7 (4.0%) 4 (3.0%) 3 (3.8%) 14 (3.6%)
Cancer 19 (10.8%) 5 (3.8%) 4 (5.1%) 28 (7.2%)
Other 38 (21.6%) 31 (23.5%) 19 (24.1%) 88 (22.7%)
Trauma/Injury/Violence 10 (5.7%) 4 (3.0%) 2 (2.5%) 16 (4.1%)
  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