Fig. 3. Exploratory analyses of efficacy of aprotinin or tranexamic acid on allogeneic erythrocyte transfusion. The odds ratio for summaries is represented as a  diamond . The width of the diamonds corresponds to the 95% confidence interval (CI). An odds ratio less than 1 indicates that the antifibrinolytic is more effective than placebo. If the value of 1 is included within the 95% CI, the result is not significant (  P > 0.05).