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. 2011 Jul;34(7):1534-9.
doi: 10.2337/dc11-0441.

Blood pressure trajectories prior to death in patients with diabetes

Mary A M Rogers  1 , Kathleen Ward, Tanya R Gure, Hae M Choe, Pearl G Lee, Steven J Bernstein, Caroline S Blaum
Affiliations

Blood pressure trajectories prior to death in patients with diabetes

Mary A M Rogers et al. Diabetes Care. 2011 Jul.

Abstract

Objective: The goals of this study were to examine trajectories of blood pressure (BP) in adults with diabetes and investigate the association of trajectory patterns with mortality.

Research design and methods: A nonconcurrent longitudinal design was used to monitor 3,766 Medicare patients with diabetes from 2005 through 2008. Data were extracted from a registry of Medicare beneficiaries, which was developed by a large academic practice that participated in the Physician Group Practice Medicare Demonstration. The relationship between BP trajectories and all-cause mortality was modeled using multilevel mixed-effects linear regression.

Results: During the 4-year study period, 10.7% of the patients died, half of whom were aged≥75 years. The crude and adjusted models both showed a greater decline in systolic and diastolic BP in patients who died than in those who did not die. In a model adjusted for age, sex, race, medications, and comorbidities, the mean systolic BP decreased by 3.2 mmHg/year (P<0.001) in the years before death and by 0.7 mmHg/year (P<0.001) in those who did not die (P<0.001 for the difference in slopes). Similarly, diastolic BP declined by 1.3 mmHg/year for those who died (P<0.001) and by 0.6 mmHg/year for those who did not die (P<0.001); the difference in slopes was significant (P=0.021).

Conclusions: Systolic and diastolic BP both declined more rapidly in the 4 years before death than in patients who remained alive.

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Figures

Figure 1
Figure 1
Mean systolic and diastolic BP trajectories for patients with diabetes mellitus, by age and mortality.
Figure 2
Figure 2
Mean systolic and diastolic BP trajectories for patients with diabetes mellitus, by sex and mortality.
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