Table 1.
Characteristics of trialists who responded to the invitation to participate in the study and those who did not
| All (n=268) | Responded (n=59) | Did not respond (n=209) | χ2 | P value | ||
|---|---|---|---|---|---|---|
| Cohort | ||||||
| Randomly selected from PubMed | 85 | 21 (25%) | 64 (75%) | |||
| Identified in Cochrane reviews: | ||||||
| Suspected of outcome reporting bias* | 85 | 17 (20%) | 68 (80%) | 0.056 | 0.812 | |
| Not suspected of outcome reporting bias* | 98 | 21 (21%) | 77 (79%) | |||
| Trial sample size | ||||||
| <100 | 122 | 28 (23%) | 94 (77%) | 0.627 | 0.731 | |
| 100-999 | 128 | 26 (20%) | 102 (80%) | |||
| >1000 | 18 | 5 (28%) | 13 (72%) | |||
| Total | 268 | 59 | 209 | |||
| Funding | ||||||
| Non-commercial | 105 | 33 (31%) | 72 (69%) | 10.064 | 0.018 | |
| Industry | 116 | 21 (18%) | 95 (82%) | |||
| Unfunded | 1 | 0 (0%) | 1 (100%) | |||
| Not stated | 46 | 5 (11%) | 41 (89%) | |||
| Total | 268 | 59 | 209 | |||
| Statistician involved | ||||||
| Statistician involved | 17 | 7 (41%) | 10 (59%) | 5.012 | 0.082 | |
| Statistician involvement unclear | 45 | 12 (27%) | 33 (73%) | |||
| No information provided | 206 | 40 (19%) | 166 (81%) | |||
| Total | 268 | 59 | 209 |
*In relation to review primary outcome.