The Associations of Pulse Pressure and Mean Arterial Pressure on Physical Function in Older Americans.

Abstract

We sought to examine the associations of pulse pressure (PP) and mean arterial pressure (MAP) on physical function in older Americans. Our analytic sample included 10,478 adults aged ≥65 years from the 2006-2016 Health and Retirement Study. Handgrip strength, gait speed, and standing balance were collected using relatively standard protocols. PP and MAP were calculated from blood pressure measurements. Older Americans with any abnormality in PP had 1.15 (95% confidence interval (CI): 1.05-1.25) greater odds for slowness and 1.14 (CI: 1.05-1.24) greater odds for poorer standing balance. Persons with any abnormality in MAP had 0.90 (CI: 0.82-0.98) decreased odds for weakness and 1.10 (CI: 1.01-1.20) greater odds for poorer standing balance. Those with low PP had 1.19 (CI: 1.03-1.36) greater odds for slow gait speed, while persons with low MAP had 1.50 (CI: 1.09-2.05) greater odds for weakness and 1.45 (CI: 1.03-2.04) greater odds for slowness. Older Americans with high PP had 1.13 (CI: 1.03-1.25) greater odds for slowness and 1.21 (CI: 1.10-1.32) greater odds for poorer balance, whereas those with high MAP had 0.87 (CI: 0.80-0.95) decreased odds for weakness. Cardiovascular dysfunction, as observed by PP and MAP, may help to explain some of our findings.