Meta-analysis of 6 studies addressing the association of FcγRIIa R131H polymorphism with heparin-induced thrombocytopenia.

Each study is shown as a point-estimate odds ratio, with lines extending to the 95% confidence interval of the odds ratio. The summary effect is obtained with random effects (RE) calculations, and for comparison we also show a summary effect based on simply adding up the numbers across studies (SUM). The numerical data are presented in Lehrnbecher et al.3