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Table 2 Quality assessments of Burke et al. in systematic reviews

From: No short-cut in assessing trial quality: a case study

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
  1. *NCT = Number of Controlled Trials; †MO = Misidentified Outcome