Reporting of systematic review papers and systematic review authors of different subtypes of individual intellectual COI, stratified by Cochrane (N=100), non-Cochrane (N=94) and overall (N=194)
| Percentages of papers with at least one author reporting the type of COI; N (%) | Distributions of the percentages of authors per paper reporting COI*; median (IQR) | |||||
|---|---|---|---|---|---|---|
| Overall | Cochrane | Non-Cochrane | Overall | Cochrane | Non-Cochrane | |
| Subtypes of individual intellectual COI | 24 (12%) | 19 (19%) | 5 (5%) | 25 (17–50) | 25 (20–50) | 14 (9–47) |
| Authorship of primary studies included in the SR† | 9 (5%) | 9 (9%) | 0 (0%) | 25 (17–63) | 25 (17–63) | NA |
| Authorship of primary studies not included in the SR† | 19 (10%) | 15 (15%) | 4 (4%) | 20 (17–50) | 20 (17–50) | 13 (7–64) |
| Participation in a previous guideline panel | 1 (1%) | 0 (0%) | 1 (1%) | NA | NA | NA |
| Writing an editorial | 0 (0%) | 0 (0%) | 0 (0%) | NA | NA | NA |
| Peer-reviewed grant funding | 0 (0%) | 0 (0%) | 0 (0%) | NA | NA | NA |
*Calculated for systematic review papers with at least one author reporting the type of individual intellectual COI (ie, papers counted in the preceding column).
†p Value for the difference between Cochrane and non-Cochrane systematic reviews is statistically significant.
COI, conflict of interest; NA, not applicable; SR, systematic review.