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Table 2 Significance level for the Begg and Mazumdar test for publication bias: Large meta-analyses*

From: Improving the error rates of the Begg and Mazumdar test for publication bias in fixed effects meta-analysis

 

Level

 

[% selected for inclusion, bias]

Range of variances

Large†

Small‡

Treatment effect (δ)

  

.0

1.76%

4.12%

 

[100%, -.00]

[100%,.00]

.5

1.70%

4.74%

 

[100%,.00]

[100%, -.00]

1.0

2.38%

4.54%

 

[100%,.00]

[100%,.00]

1.5

1.96%

4.30%

 

[100%,.00]

[100%, -.00]

2.0

1.60%

4.24%

 

[100%,.00]

[100%, -.00]

2.5

1.88%

4.10%

 

[100%,.00]

[100%,.00]

3.0

1.64%

4.22%

 

[100%,.00]

[100%,.00]

  1. * k=75 studies; nominal significance level 0.05.
  2. v = 0.1, 1.0, 10.0, ‡v = 0.5, 1.0, 2.0.
  3. Values deviating significantly from the nominal level 5.00% over the 5000 simulations (using a 5% level in the binomial test) are typed in boldface.