Linear regression for cardiovascular predictive analysis
OK, now, let’s formulate the model based on research question number 1: Is ST depression magnitude associated with the maximum heart rate achieved during a test set? Why is it not easy to formulate this model?
Well, this is because the heart rate is known to be affected by age. Namely, the younger subjects typically have higher heart rates when compared to the older subjects. So, age might affect the value of maximum heart rate and have a confounding effect on the final results. This is especially important when considering the fact that we would like the CAD subjects to be slightly older in our sample.
Now, let’s create the diagram for the potential predictive model:
Figure 9.7 – The basic stress test model
As you can see, the ST depression is the independent variable and the target variable is the stress test maximum heart rate. However, what is also added is a known...
