Platelet functional response in the Platelet Function Cohort. Comparison of the platelet response to ADP and CRP-XL in the 37 selected subjects (○) with the 500 subjects in the whole PFC (•). Platelet activation was measured by flow cytometry, and data are shown as the standardized residuals of logit transformed data, after adjustment for confounding variables, as described by Jones et al.¹  PA, P-selectin expression in response to ADP; PC, P-selectin expression in response to CRP-XL; FA, fibrinogen binding in response to ADP; FC, fibrinogen binding in response CRP-XL. Error bars show the median and interquartile ranges.