Fig. 3.

Meta-analysis of the effect of conjugated linoleic acid supplementation on HDL cholesterol in published clinical trials. The study-specific standardized difference (Std diff) in means and 95 % CI are represented by the black square and horizontal line, respectively; the area of the black square is proportional to the specific-study weight to the overall meta-analysis. The centre of the black diamond presents the pooled standardized difference in means and its width represents the pooled 95 % CI