Characteristics of the reported COI disclosures in Cochrane (N=100) and non-Cochrane (N=100) systematic reviews
| Overall | Cochrane | Non-Cochrane | ||
|---|---|---|---|---|
| N (%) | n (%) | n (%) | p Value * | |
| Papers that report authors’ COI disclosures | 194 (97%) | 100 (100%) | 94 (94%) | 0.029 |
| Form of COI disclosures† | ||||
| Provided as a narrative statement in the main document | 193 (99%) | 100 (100%) | 93 (99%) | 0.014 |
| Provided in an online document that was accessible | 4 (2%)‡ | 0 (0%) | 4 (4%) | 0.121 |
| Provided in an online document that was not accessible | 0 (0%) | 0 (0%) | 0 (0%) | NA |
| Available on request | 9 (5%) | 0 (0%) | 9 (10%) | 0.003 |
*p Value for the difference between Cochrane and non-Cochrane systematic reviews.
†Calculated using N=194 as the denominator in the overall group (100 and 94 in the two respective subgroups).
‡All four consisted of ICMJE uniform disclosure forms.
COI, conflict of interest; ICMJE, International Committee of Medical Journal Editors; NA, not applicable.