 |
| |
| Variables | n | % |
|---|---|---|
| Type of study | ||
| Did the studies analyze a previous modification or a modification proposed by the authors? | 35 | 74.46 |
| Studies that analyzed a previous modification not proposed by the authors | 10 | 21.28 |
| Studies that analyzed a modification proposed by the authors | 2 | 4.25 |