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Table 3 Ratio of odds ratio between large and small trials stratified by characteristics of meta-analyses.

From: Small studies may overestimate the effect sizes in critical care meta-analyses: a meta-epidemiological study

Comparison No. of meta-analyses No. of trials Ratio of odds ratio (95% CI) Heterogeneity (I2)
Overall 27 317 0.60 (0.53-0.68) 50.3%
Significance of effect size     
Significant 8 99 0.49 (0.38-0.60) 62.9%
Non-significant 19 218 0.69 (0.59-0.79) 28.8%
Heterogeneity     
Low 19 220 0.79 (0.68-0.90) 0%
High 8 97 0.46 (0.36-0.55) 57.2%