Association between depression and hypertension using classic and revised blood pressure thresholds

Area of Science:

• Cardiology
• Psychiatry
• Primary Care Medicine

Background:

• The relationship between depression treatment and hypertension (HTN) management under revised ACC/AHA HTN guidelines is not well understood in primary care.
• This study investigates this relationship in a primary care setting.

Purpose of the Study:

• To compare the association between changes in depression severity and hypertension (HTN) over time using newly revised versus previous HTN guidelines.
• To determine if revised HTN guidelines impact the observed relationship between depression and HTN management.

Main Methods:

• A retrospective cohort study included 3018 outpatients with depressive symptoms and elevated blood pressure.
• Patients were categorized into 'revised' (≥130/80 mmHg), 'classic' (≥140/90 mmHg), or 'revised-minus-classic' groups.
• Depression severity (PHQ-9) and HTN levels were tracked over 6-18 months, with correlations analyzed using robust regression.

Main Results:

• Depressive symptom change was unrelated to blood pressure change in the revised and revised-minus-classic groups.
• The classic HTN guideline group showed a statistically significant but clinically insignificant change in systolic blood pressure per unit change in PHQ-9 score (β = 0.23, P=0.02).
• Only 41% of subjects had follow-up data for PHQ-9 and HTN.

Conclusions:

• While classic HTN guidelines showed a statistically significant association between reduced HTN and improved depression, it was not clinically meaningful.
• No clinically meaningful association was found between depression treatment and improved HTN levels under either revised or classic guidelines.