Table 1 Comparison of Cochrane overviews and non-Cochrane overviews
Cochrane overviews (n = 20) | Non-Cochrane overviews (n = 78) | Mann-Whitney U test (p value) | Odds ratio (95% CI) | |
|---|---|---|---|---|
Included SRs (median, IQR) | 10 (6; 18.5) | 14 (8.25; 24) | 0.184 | |
SRs affected by DCA per overview (median, IQR) | 5 (2.5; 7) | 1 (0; 2) | < 0.001 | |
Overviews affected by DCA | 18 (90%) | 40 (51%)* | 8.6 (1.9–39.4) | |
Independent assessment | 8 (44%) | 8 (20%) | 3.2 (1.0–10.7) | |
SRs not assessed independently (median, IQR) | 0 (0; 4.25) | 1 (0; 2) | 0.787 | |
Reported as limitation | 5 (28%) | 2 (5%) | 7.3 (1.3–42.3) | |
Reported as declaration of interest | 11 (61%) | 4 (10%) | 11.0 (2.8–42.8) | |
Safeguard | 7 (39%) | 2 (5%) | 12.1 (2.2–66.8) |