Table 1

Characteristics of journal policies for ICMJE-member and ICMJE-affiliated journals

ICMJE-member journals
(n=14)
ICMJE-affiliated journals
(n=489)
Type of data-sharing policy
 Explicit8 (57%)145 (30%; 26% to 34%)
 Not existing1 (8%)68 (14%; 11% to 17%)
 ICMJE5 (35%)276 (56%; 52% to 61%)
Sanctions in non-compliance of data-sharing2 (14%)0
Trial registration demanded
 Yes, with a specification that it must be prospective7 (50%)178 (37%; 32% to 41%)
 Yes, without specification3 (21%)142 (29%; 25% to 33%)
 Referring to ICMJE3 (21%)114 (23%; 20% to 27%)
 No1 (8%)55 (11%; 9% to 14%)
Issue/year*16 (12–51)6 (4–12)
Impact factor 2017†11.7 (2.7–35.6)2.4 (1.5–4)
  • *Not found for two journals; indicated in median and IQR.

  • †Not found for 258 journals; indicated in median and IQR.

  • ICMJE, International Committee of Medical Journal Editors.