Gait Speed and Instrumental Activities of Daily Living in Older Adults After Hospitalization: A Longitudinal Population-Based Study.

Abstract

BACKGROUND\nHospitalization can impair physical and functional status of older adults, but it is unclear whether these deficits are transient or chronic. This study determined the association between hospitalization of older adults and changes in long-term longitudinal trajectories of two measures of physical and functional status: gait speed (GS) and Instrumental Activities of Daily Living measured with Functional Activities Questionnaire (FAQ).\n\n\nMETHODS\nLinear mixed effects models assessed the association between hospitalization (non-elective vs. elective, and surgical vs. medical) and outcomes of GS and FAQ score in participants (>60 years old) enrolled in the Mayo Clinic Study of Aging who had longitudinal assessments.\n\n\nRESULTS\nOf 4,902 participants, 1,879 had ≥1 hospital admission. Median GS at enrollment was 1.1 m/s. The slope of the annual decline in GS before hospitalization was -0.015 m/s. The parameter estimate [95%CI] for additional annual change in GS trajectory after hospitalization was -0.009 [-0.011 to -0.006] m/s, P<0.001. The accelerated GS decline was greater for medical vs. surgical hospitalizations (-0.010 vs. -0.003 m/s, P=0.005), and non-elective vs. elective hospitalizations (-0.011 vs -0.006 m/s, P=0.067). The odds of a worsening FAQ-score increased on average by 4% per year. Following hospitalization, odds of FAQ-score worsening further increased (multiplicative annual increase in odds ratio per year [95%C] following hospitalization was 1.05 [1.03, 1.07], P<0.001).\n\n\nCONCLUSIONS\nHospitalization of older adults is associated with accelerated long-term decline in GS and functional limitations, especially after non-elective admissions and those for medical indications. However, for most well-functioning participants these changes have little clinical significance.