1. Stance time variability during stair stepping before and after total knee arthroplasty: A pilot study.
- Author
-
Smith, Jessica W., Marcus, Robin L., Tracy, Brian L., Foreman, K. Bo, Christensen, Jesse C., and LaStayo, Paul C.
- Subjects
- *
HUMAN mechanics , *ARTHROPLASTY , *QUADRICEPS muscle , *VARIABILITY (Psychometrics) , *LONGITUDINAL method , *PILOT projects , *GAIT in humans , *RANGE of motion of joints , *KNEE , *KNEE diseases , *MUSCLE strength , *OSTEOARTHRITIS , *SURGICAL complications , *TIME , *TOTAL knee replacement , *SYMPTOMS - Abstract
The main objectives of this pilot study were to: (1) investigate stance time variability (STV) during stair stepping in older adults with osteoarthritis (OA) before and after total knee arthroplasty (TKA), and compare to an age- and sex-matched group of healthy controls with native knees and (2) evaluate the relationship between quadriceps strength and STV during stair stepping before and after TKA. A prospective, observational, pilot study was carried out on 13 individuals (15% male, mean age 62.71±6.84years) before and after TKA using an instrumented stairway, patient-reported outcomes, timed stair stepping test, and quadriceps strength measures. At 6-months post-operatively, STV during stair descent was significantly greater in the TKA-GROUP compared to the CONTROL-GROUP, but was not significantly different at 12-months compared to controls. There were no significant differences in STV for stair ascent between the pre- and post-operative visits, or compared to controls. There was a trend toward significance for the relationship between quadriceps strength and STV during stair ascent (P=0.059) and descent (P=0.073). Variability during stair stepping may provide an important, short-term rehabilitation target for individuals following TKA and may represent another parameter to predict declines in functional mobility. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF