Pulse pressure and mortality in older people

Area of Science:

• Gerontology
• Cardiovascular Medicine
• Epidemiology

Background:

• Observational data on blood pressure and mortality in older adults are inconsistent.
• This study investigates which blood pressure measures best predict mortality in this demographic.

Purpose of the Study:

• To determine the optimal blood pressure parameters for predicting cardiovascular and total mortality in older adults.
• To clarify the roles of systolic, diastolic, pulse, and mean arterial pressure in mortality risk.

Main Methods:

• Utilized data from the Established Populations for Epidemiologic Studies of the Elderly (EPESE) cohort, initiated in 1981.
• Analyzed baseline blood pressure measurements (N=9431, aged 65-102) with medical history and functional data.
• Followed participants for an average of 10.6 years, recording 4528 deaths (2304 cardiovascular).

Main Results:

• The lowest mortality rates were observed with systolic pressure <130 mm Hg and diastolic pressure 80-89 mm Hg.
• Elevated systolic pressure (≥160 mm Hg) and low diastolic pressure (<70 mm Hg) independently increased cardiovascular and total mortality.
• Pulse pressure was a stronger predictor of mortality than diastolic or mean arterial pressure.

Conclusions:

• Pulse pressure emerges as the most effective single blood pressure measure for predicting mortality in older individuals.
• This finding helps reconcile conflicting results regarding the impact of low diastolic blood pressure on mortality.