SQL Explanation

Query: Adherence Rate by Hypertension Diagnosis

What it does:
This query compares medication adherence between patients who have been diagnosed with hypertension and those who have not.

SQL Breakdown:

• diagnosis_hypertension: Uses a boolean field (t for true, f for false) indicating if the patient has a hypertension diagnosis.
  
  

• COUNT(*) AS patients: Counts the total number of patients in each group.
  
  

• COUNT(*) FILTER (WHERE adherence = 'ADHERENT') * 1.0 / COUNT(*) AS adherence_rate: Calculates adherence rate by dividing the number of adherent patients by total patients.
  
  

• GROUP BY diagnosis_hypertension: Separates results into two groups based on hypertension diagnosis status.
  
  

Output Summary:

• Patients without hypertension (f): 4,805 patients — 43.87% adherence rate
  
  

• Patients with hypertension (t): 19,279 patients — 39.22% adherence rate
  
  

Why this matters:
This result shows that hypertensive patients are slightly less adherent to their statin medications than those without hypertension. While the difference is modest, it may highlight opportunities to improve medication education and follow-up specifically for patients managing multiple chronic conditions.

Note: This dataset is synthetic and used strictly for educational purposes. It does not reflect real patient data.