Results of search of AJNR articles with the term “no significant difference” on August 8, 2006
| n | % | |
|---|---|---|
| Study design | ||
| Prospective | 28 | 70 |
| Retrospective | 10 | 25 |
| Indeterminate* | 2 | 5 |
| Study type | ||
| Lab/Animal | 7 | 17.5 |
| Statistics | ||
| Parametric | 22 | 55 |
| Nonparametric | 11 | 27.5 |
| Both | 7 | 17.5 |
| Clearly indicated power | 3 | 7.5 |
| Raised the issue of power | 6 | 15 |
| Provided confidence intervals for results | 2† | 5 |
* Study design could not be determined from the Methods section.
† Neither of these studies indicated the power of their analysis