Blood pressure variables and cardiovascular risk: new findings from ADVANCE

Andre-Pascal Kengne1, Sébastien Czernichow, Rachel Huxley

  • 1ADVANCE Collaborative Group, The George Institute for International Health, PO Box M201, Missenden Road, Sydney NSW 2050, Australia.

Insights

Systolic blood pressure (SBP) and pulse pressure (PP) are key indicators for cardiovascular risk in type 2 diabetes patients. Diastolic blood pressure (DBP) is less effective, with SBP being the simplest predictor.

Area of Science:

  • Cardiology
  • Endocrinology
  • Vascular Medicine

Background:

  • Cardiovascular risk stratification in type 2 diabetes mellitus (T2DM) requires understanding the impact of various blood pressure indices.
  • Previous research has not definitively established the relative importance of different blood pressure measures on cardiovascular outcomes in T2DM.
  • The Action in Diabetes and Vascular Disease: Preterax and Diamicron-Modified Release Controlled Evaluation (ADVANCE) study provides a large cohort for this investigation.

Purpose of the Study:

  • To compare the predictive strength of baseline systolic blood pressure (SBP), diastolic blood pressure (DBP), pulse pressure (PP), and mean arterial pressure (MAP) for major cardiovascular events in T2DM patients.
  • To determine which blood pressure index is the most effective determinant of cardiovascular risk in this population.
  • To evaluate the utility of achieved blood pressure values versus baseline values in risk prediction.

Main Methods:

  • Analysis of 11,140 participants from the ADVANCE study with a mean follow-up of 4.3 years.
  • Statistical comparison of hazard ratios for major cardiovascular events associated with increments in SBP, DBP, PP, and MAP.
  • Receiver operating characteristic (ROC) curve analysis to compare the discriminatory ability of different blood pressure indices.
  • Assessment of risk prediction models using both baseline and achieved blood pressure measurements.

Main Results:

  • Higher hazard ratios for major cardiovascular events were associated with increments in SBP (1.17) and PP (1.20) compared to MAP (1.12) and DBP (1.04).
  • ROC curve analysis indicated slightly better discrimination for SBP and PP than MAP and DBP for major cardiovascular and coronary events.
  • Using achieved blood pressure values offered marginal improvements for SBP, DBP, and MAP, but did not significantly alter the predictive performance compared to PP.

Conclusions:

  • Systolic blood pressure (SBP) and pulse pressure (PP) are the most significant determinants of major cardiovascular outcomes in older patients with type 2 diabetes mellitus.
  • Diastolic blood pressure (DBP) demonstrated the least effectiveness in predicting cardiovascular risk in this cohort.
  • SBP emerges as the simplest and most broadly applicable predictor of cardiovascular risk across diverse age groups and populations with T2DM.

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