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Why isn’t diastolic blood pressure used in the absolute risk calculator?

Answer

The absolute risk calculator is based on the Framingham Risk Equation. Separate Framingham equations were developed for use of systolic blood pressure and diastolic blood pressure. Except for the blood pressure covariate, the models are identical for both blood pressures and for most outcomes differences in predictive probabilities are slight. However, because the log likelihoods are slightly higher when systolic blood pressure is used, it has been recommended by Anderson et al. (1991) that systolic blood pressure be used where possible.

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