Table 1 Study characteristics
Study characteristic | Published studies (N = 64) | Unpublished studies (N = 19) |
|---|---|---|
Study design | ||
RCT | 52 | 14 |
Non-RCT | 12 | 5 |
Country | ||
USA | 43 | 9 |
Other | 21 | 10 |
Funding type | ||
Government | 43 | 11 |
Foundation/Association | 7 | 0 |
Industry | 1 | 0 |
Unclear/Not reported | 13 | 8 |
Results reported in registry | ||
Yes | 4 | 0 |
No | 60 | 19 |
NCT number reported in publication | ||
Yes | 38 | |
No | 26 | |