Sensory and cognitive factors influencing functional ability in older adults.
BACKGROUND
Age-related sensory and cognitive impairments have been related to functional performance in older adults. With regard to cognitive abilities, processing speed in particular may be strongly related to older adults' abilities to perform everyday tasks. Identifying and comparing cognitive correlates of functional performance is particularly important in order to design interventions to promote independence and prevent functional disability.


OBJECTIVE
The present study examined the relative importance of cognitive (specifically, speeded and nonspeeded) and sensory factors in relation to older adults' functional abilities. Functional abilities included measures of mobility and performance of everyday activities.


METHODS
A cross-sectional study design was employed. Five hundred and thirty adults between the ages of 62 and 94 completed measures of sensory, cognitive (including processing speed, attention, memory, intelligence) and functional abilities.


RESULTS
Overall, functional performance was most strongly associated with cognitive speed performance, but nonspeeded cognitive and sensory abilities also accounted for significant amounts of variance in functional performance. Age explained a small but statistically significant amount of additional variance in some functional abilities, but no additional variance in self-reported mobility measures.


CONCLUSIONS
These findings point to the potential impact of multifaceted training programs, targeting both sensory and cognitive abilities for maintaining functional abilities.
Wood
Kimberly M
KM
Edward R. Roybal Center for Translational Research on Aging and Mobility, Department of Psychology, University of Alabama at Birmingham, Birmingham, AL 35294-2100, USA. kmwood@uab.edu
Edwards
Jerri D
JD
Clay
Olivio J
OJ
Wadley
Virginia G
VG
Roenker
Daniel L
DL
Ball
Karlene K
KK
D000203:Activities of Daily Living; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000502:physiology; D003072:Cognition Disorders / Q000503:physiopathology*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009068:Movement; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time; D012678:Sensation Disorders / Q000503:physiopathology*; D013997:Time Factors