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Table 2 Effect of increasing within trial precision (factor M) on heterogeneity measures (data in [14]).

From: Undue reliance on I 2 in assessing heterogeneity may mislead

Factor

Measure

M

τ ^ 2 MathType@MTEF@5@5@+=feaagaart1ev2aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacPC6xNi=xH8viVGI8Gi=hEeeu0xXdbba9frFj0xb9qqpG0dXdb9aspeI8k8fiI+fsY=rqGqVepae9pg0db9vqaiVgFr0xfr=xfr=xc9adbaqaaeGaciGaaiaabeqaaeqabiWaaaGcbaGafqiXdqNbaKaadaahaaWcbeqaaiabikdaYaaaaaa@2EC9@

Q (P-value)

I 2

H

1

0.018

85 (0.0953)

18.6% [0%; 40.1%]

1.11 [1; 1.29]

4

0.008

98 (0.0135)

29.2% [4.5%; 47.6%]

1.19 [1.02; 1.38]

16

0.027

454 (<0.0001)

84.8% [81.4%; 87.5%]

2.56 [2.32; 2.83]

64

0.028

1708 (<0.0001)

96.0% [95.4%; 96.5%]

4.98 [4.65; 5.32]