Table 2.
Quality assessments of Burke et al. in systematic reviews
| Review | Year | NCT* | Quality | Internal Validity Problems |
| 1. Lehnert [37] | 1993 | 5 | Good | None Stated |
| 2. Rosenfeld et al. [39] | 1994 | 4 | High | None Stated |
| 3. Del Mar et al. [40] | 1997 | 8 | 10/11 | None Stated |
| 4. Froom et al. [53] | 1997 | 7 | Adequate | None Stated |
| 5. Cantekin [38] | 1998 | 8 | Not Good | Baseline Comparability |
| 6. Marcy et al. [41] | 2001 | 6 | 4/5 | Dropouts Description |
| 7. Glasziou et al. [42] | 2003 | 10 | High | Baseline Comparability, MO† |
| 8. Rosenfeld [46] | 2003 | 9 | High | None Stated |
| 9. Rovers et al. [43] | 2006 | 6 | High | None Stated |
*NCT = Number of Controlled Trials; †MO = Misidentified Outcome