Clinical Signals in Heart Disease Diagnosis

Patients in Cohort
Max Heart Rate Signal
Lower as diagnosis severity rises
ST Depression Signal
Higher as diagnosis severity rises
Cholesterol Signal
Minimal direct linear relationship
Clinical Takeaways

The clearest diagnostic separation comes from exercise response and ischemic burden rather than serum cholesterol alone.

    Population & Distribution Context

    Cholesterol patterns vary more across demographic subgroups than across the diagnosis scale itself, which helps explain the weak overall correlation.

      Correlation overview of key clinical variables
      Pearson correlation against the diagnosis severity target (0 = no disease, 4 = highest severity).
      Max heart rate declines as diagnosis severity increases
      Box plots show the full distribution of thalach at each diagnosis level, with the gold line marking group means.
      ST depression rises with disease burden
      Oldpeak strengthens steadily across diagnosis levels and shows the strongest positive linear relationship in this cohort.
      Cholesterol overlaps heavily across diagnosis levels
      Despite some subgroup variation, the overall cholesterol-diagnosis relationship remains weak and visually inconsistent.
      Cholesterol distribution across age groups and sex
      Grouped box plots highlight broader cholesterol spread in older age bands, especially among women aged 50-69.
      Observed diagnosis prevalence by age group and sex
      Heatmap percentages show how frequently any positive diagnosis appears within each demographic subgroup.
      Age-group and sex subgroup summary
      Age Group Sex n Mean Cholesterol Median Cholesterol Diagnosis Rate