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Figure 2 Scatter plot demonstrating the relation between the drug delivery rate and the relative size of the infusion balloon, expressed as a ratio of its diameter to the MLD of the stenosis after balloon angioplasty. Solid circles represent the observed delivery rates; the line represents the results of multiple linear regression; and the open circles represent the predicted rates based on the multivariate model. Note the low correlation coefficient (r = 0.068) and the poor correspondence between observed and predicted values.
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