Cumulative Blood Pressure Load and Incident CKD

Area of Science:

• Nephrology
• Cardiovascular Medicine
• Epidemiology

Background:

• Hypertension is a primary risk factor for chronic kidney disease (CKD).
• Previous studies primarily focused on single blood pressure (BP) measurements, leaving the impact of long-term cumulative BP load debated.
• Understanding the association between cumulative BP load and CKD risk is vital for preventative strategies.

Purpose of the Study:

• To investigate the association between long-term cumulative blood pressure (BP) loads and the risk of incident chronic kidney disease (CKD).
• To analyze this association in a cohort of healthy Korean adults with normal kidney function.

Main Methods:

• Prospective cohort study involving 5,221 Korean adults without pre-existing CKD.
• Cumulative systolic BP (SBP) and diastolic BP (DBP) loads calculated using area under the curve (AUC) ratios.
• Multivariable Cox proportional hazards regression used to determine independent associations.

Main Results:

• Higher cumulative SBP and DBP loads were significantly associated with an increased risk of incident CKD.
• Individuals in higher tertiles of cumulative BP loads showed substantially greater risks compared to the reference group.
• These associations persisted even in participants without prior hypertension or antihypertensive medication use.

Conclusions:

• High cumulative SBP and DBP loads are linked to an elevated risk of developing CKD.
• The findings emphasize the importance of monitoring and managing long-term BP exposure for kidney health, irrespective of baseline BP levels.
• Cumulative BP load is a significant predictor of incident CKD in adults with initially normal kidney function.