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Table 1 Choice of model in relation to the P-value for the heterogeneity test.

From: Dealing with substantial heterogeneity in Cochrane reviews. Cross-sectional study

 

Newer reviews

Older reviews

P

Random

Fixed

Random

Fixed

< 0.0001

6

0

2

6

[0.0001;0.001[

2

1

2

1

[0.001;0.01[

1

2

0

3

[0.01;0.05[

7

4

1

4

[0.05;0.1[

6

2

0

8

> = 0.1

0

0

0

2

Total

22

9

5

24

  1. Newer reviews are those updated after 1 June 2005 (n = 31). P = 0.007 for those reviews where the heterogeneity test yielded a P-value between 0.05 and 0.10
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BMC Medical Research Methodology

ISSN: 1471-2288

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