Association of explanatory variables identified as significant in univariate analysis with bleeding score after adjustment for the platelet count. ORs and 95% CIs per 1 SD unit (defined below) increase in the indicated parameter. One SD unit for each test is as follows: Act. GPIIb-IIIa–positive platelets, 1.5 µM TRAP, 29.2%; P-selectin–positive platelets, 1.5 µM TRAP, 27.6%; IPF, 11.6%; platelet surface CD42b MFI, 20 µM TRAP, 65.8 geometric mean fluorescence units; platelet surface GPIb MFI, 1.5 µM TRAP, 82.9 geometric mean fluorescence units; platelet surface P-selectin MFI, no agonist, 4.9 geometric mean fluorescence units; FSC, no agonist, 99.0 FSC units.