Background/ Objectives
Gait Velocity (GV) is predictive of hospitalizations and mortality in the elderly. In the US, elderly African Americans have higher rates of physical disability compared to Caucasians. Few studies have investigated if there are racial differences in GV in the elderly.
Design
We performed a cross sectional analysis to investigate racial differences in GV.
Setting/Participants
Participants were part of the Einstein Aging Study, a longitudinal study of community-residing elderly in the Bronx, NY. They were recruited using Medicare and voter registration records. Records of 213 participants were analyzed.
Measurements
Demographics, medical history, the Geriatric Depression Scale, the Blessed Information Memory Concentration Test, and the Total Pain Index (TPI) were collected. GV was measured using the GAITrite® mat.
Results
We included 157 Caucasians and 56 African Americans. Caucasians were older (median 79.9y v 75.5y, p<0.01), more educated (median 14y v 12y, p<0.01) and had lower BMIs (mean 26.9±4.3 v 28.9±6.4, p=0.03). African Americans had higher proportions of female participants (80.4% v 59.9%, p<0.01) and diabetes (28.6% v 13.4%, p=0.01). Neither group had significantly higher pain levels. African Americans had a significantly slower GV (mean 90.2±17.9 v 99.1±20.1 cm/sec, p<0.01). This difference persists despite adjusting for multiple covariates. A 7.79 cm /sec slower gait speed in African Americans versus Caucasians was not explained by differences in common factors known to influence gait.
Conclusion
Differences in GV persist between African Americans and Caucasians despite adjusting for many confounders. Increases of just 10cm/sec are associated with reduced mortality. Further studies are needed to evaluate if there are modifiable risk factors that potentially explain this difference and if an intervention could reduce the discrepancy between the groups.