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Figure 2 The odds ratio (OR) plots with 95% confidence interval (CIs) for the rate of 30-day mortality. The boxes for the CLopidogrel ASpirin Stent International Cooperative Study (CLASSICS) and North Memorial studies reflect directionality and sample size, but true ORs cannot be determined, because both trials had an arm with a point estimate of zero. Arrows indicate that the limits of the CI extend beyond the graph. CCF = Cleveland Clinic Foundation; TOPPS = Ticlid Or Plavix Post-Stent.
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