Table 2

Journal characteristics associated with an explicit data-sharing policy

All journals
(n=489)
Journals with an explicit data-sharing policy
(n=145)
Journals without an explicit data-sharing policy
(n=344)
Univariate analysis
OR (95% CI)
P valueMultivariate analysis
aOR (95% CI)*
P value
Number of issues per year*
 More than 12 (reference)17 (4%)9 (6%)8 (2%)
 1–5241 (49%)45 (31%)196 (57%)0.21 (0.07 to 0.56)0.0021 (0.25 to 4.17)0.83
 6–12229 (47%)90 (73%)139 (41%)0.58 (0.21 to 1.56)0.280.88 (0.25 to 3)0.99
Journal impact factor
 First quartile (reference) (0.126–1.532)58 (12%)20 (14%)38 (11%)
 Second quartile (1.532–2.388)58 (12%)25 (17%)33 (10%)1.43 (0.68 to 3.07)0.350.9 (0.35 to 2.32)0.82
 Third quartile (2.388–3.993)57 (12%)28 (19%)29 (8%)1.81 (0.87 to 3.92)0.120.77 (0.28 to 2.05)0.59
 Fourth quartile (3.993–20.871)58 (12%)32 (22%)26 (8%)2.3 (1.11 to 5.01)0.031.7 (0.69 to 4.65)0.26
 No impact factor258 (52%)40 (28%)218 (63%)0.35 (0.19 to 0.67)0.0010.52 (0.2 to 1.3)0.16
Publisher†
 Big output194 (40%)66 (45%)128 (37%)
 Medium output39 (8%)32 (22%)7 (2%)8.37 (3.77 to 22.86)<0.0013.23 (1.23 to 11.33)0.02
 Small output39 (8%)17 (12%)22 (7%)1.5 (0.74 to 3.01)0.250.36 (0.08 to 1.09)0.09
 Other217 (44%)30 (21%)187 (54%)0.31 (0.19 to 0.51)<0.0010.35 (0.17 to 0.63)0.001
Gender of editor
 Men (reference)403 (82%)120 (83%)283 (82%)
 Women63 (13%)16 (11%)47 (14%)0.82 (0.43 to 1.46)0.51
 Both genders represented23 (5%)9 (6%)14 (4%)1.54 (0.62 to 3.55)0.33
Country of editorial office‡
 North America (reference)114 (24%)51 (40%)63 (19%)
 Asia/Middle East/Oceania211 (45%)22 (17%)189 (56%)0.15 (0.08 to 0.26)<0.0010.96 (0.4 to 2.25)0.92
 Europe71 (15%)16 (12%)55 (16%)0.37 (0.18 to 0.7)0.0030.48 (0.21 to 1)0.06
 UK51 (11%)37 (29%)14 (4%)3.2 (1.6 to 6.86)0.0011.82 (0.83 to 4.4)0.15
 Other country/region21 (4%)2 (2%)19 (5%)0.16 (0.02 to 0.53)0.013.01 (0.3 to 19.02)0.23
Income band of country of editorial office‡
 High income (reference)270 (58%)120 (94%)150 (44%)
 Upper middle income88 (19%)4 (3%)84 (25%)0.07 (0.2 to 0.16)<0.0010.12 (0.02 to 0.44)0.002
 Lower middle income/low income110 (23%)4 (3%)106 (31%)0.05 (0.01 to 0.13)<0.0010.09 (0.02 to 0.27)<0.001
Research domain
 General and internal medicine (reference)110 (22%)19 (13%)91 (26%)
 Surgery specialty71 (15%)23 (16%)48 (14%)2.27 (1.14 to 4.67)0.021.47 (0.6 to 3.84)0.4
 Dentistry30 (6%)3 (2%)27 (8%)0.6 (0.12 to 1.82)0.410.43 (0.04 to 2.02)0.33
 Medical specialty220 (45%)75 (52%)145 (43%)2.43 (1.41 to 4.47)0.0021.12 (0.53 to 2.51)0.76
 Pharmacology and pharmacy23 (5%)12 (8%)11 (3%)5.1 (2 to 13.84)<0.0012.47 (0.66 to 11.29)0.19
 Other specialty35 (7%)13 (9%)22 (6%)2.82 (1.2 to 6.6)0.021.35 (0.42 to 4.4)0.6
  • *Missing data for 2 journals: 1 journal without explicit data-sharing policy and 1 with explicit data-sharing policy.

  • †Missing data for 21 journals: 4 journals without explicit data-sharing policy and 17 with explicit data-sharing policy.

  • ‡Journals that published over 15 journals in the medical domain: big output >1000 journals, medium output 250–1000 journals, small output <250 journals in publisher repertoire. Other: publishers that did publish under 15 journals in the medical domain.

  • aOR, adjusted Odds ratio.