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 value | Multivariate analysis aOR (95% CI)* |
P value | |
| Number of issues per year* | |||||||
| More than 12 (reference) | 17 (4%) | 9 (6%) | 8 (2%) | – | – | – | – |
| 1–5 | 241 (49%) | 45 (31%) | 196 (57%) | 0.21 (0.07 to 0.56) | 0.002 | 1 (0.25 to 4.17) | 0.83 |
| 6–12 | 229 (47%) | 90 (73%) | 139 (41%) | 0.58 (0.21 to 1.56) | 0.28 | 0.88 (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) | 0.35 | 0.9 (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) | 0.12 | 0.77 (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) | 0.03 | 1.7 (0.69 to 4.65) | 0.26 |
| No impact factor | 258 (52%) | 40 (28%) | 218 (63%) | 0.35 (0.19 to 0.67) | 0.001 | 0.52 (0.2 to 1.3) | 0.16 |
| Publisher† | |||||||
| Big output | 194 (40%) | 66 (45%) | 128 (37%) | – | – | – | – |
| Medium output | 39 (8%) | 32 (22%) | 7 (2%) | 8.37 (3.77 to 22.86) | <0.001 | 3.23 (1.23 to 11.33) | 0.02 |
| Small output | 39 (8%) | 17 (12%) | 22 (7%) | 1.5 (0.74 to 3.01) | 0.25 | 0.36 (0.08 to 1.09) | 0.09 |
| Other | 217 (44%) | 30 (21%) | 187 (54%) | 0.31 (0.19 to 0.51) | <0.001 | 0.35 (0.17 to 0.63) | 0.001 |
| Gender of editor | |||||||
| Men (reference) | 403 (82%) | 120 (83%) | 283 (82%) | – | – | – | – |
| Women | 63 (13%) | 16 (11%) | 47 (14%) | 0.82 (0.43 to 1.46) | 0.51 | – | – |
| Both genders represented | 23 (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/Oceania | 211 (45%) | 22 (17%) | 189 (56%) | 0.15 (0.08 to 0.26) | <0.001 | 0.96 (0.4 to 2.25) | 0.92 |
| Europe | 71 (15%) | 16 (12%) | 55 (16%) | 0.37 (0.18 to 0.7) | 0.003 | 0.48 (0.21 to 1) | 0.06 |
| UK | 51 (11%) | 37 (29%) | 14 (4%) | 3.2 (1.6 to 6.86) | 0.001 | 1.82 (0.83 to 4.4) | 0.15 |
| Other country/region | 21 (4%) | 2 (2%) | 19 (5%) | 0.16 (0.02 to 0.53) | 0.01 | 3.01 (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 income | 88 (19%) | 4 (3%) | 84 (25%) | 0.07 (0.2 to 0.16) | <0.001 | 0.12 (0.02 to 0.44) | 0.002 |
| Lower middle income/low income | 110 (23%) | 4 (3%) | 106 (31%) | 0.05 (0.01 to 0.13) | <0.001 | 0.09 (0.02 to 0.27) | <0.001 |
| Research domain | |||||||
| General and internal medicine (reference) | 110 (22%) | 19 (13%) | 91 (26%) | – | – | – | – |
| Surgery specialty | 71 (15%) | 23 (16%) | 48 (14%) | 2.27 (1.14 to 4.67) | 0.02 | 1.47 (0.6 to 3.84) | 0.4 |
| Dentistry | 30 (6%) | 3 (2%) | 27 (8%) | 0.6 (0.12 to 1.82) | 0.41 | 0.43 (0.04 to 2.02) | 0.33 |
| Medical specialty | 220 (45%) | 75 (52%) | 145 (43%) | 2.43 (1.41 to 4.47) | 0.002 | 1.12 (0.53 to 2.51) | 0.76 |
| Pharmacology and pharmacy | 23 (5%) | 12 (8%) | 11 (3%) | 5.1 (2 to 13.84) | <0.001 | 2.47 (0.66 to 11.29) | 0.19 |
| Other specialty | 35 (7%) | 13 (9%) | 22 (6%) | 2.82 (1.2 to 6.6) | 0.02 | 1.35 (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.