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Single step test valid test of activity limitations in patients after TKA
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When intending to assess unilateral lower extremity impairments of patients after total knee arthroplasty, single step test scores can be reliably measured between testers and are a valid and responsive test of activity limitations, according to study results.
Researchers tested patients who underwent unilateral total knee arthroplasty (TKA) at initial outpatient physical therapy evaluation, 3 months and 1 year after TKA. Clinicians and a clinical and a switch mat assessed inter-tester reliability.
When using a stop watch, researchers determined the assessment of function with the single step test (SST) was reliable between testers. According to the results, SST times were significantly correlated with other measures of lower extremity functional performance. According to the abstract, this provided evidence of SST validity in patients after TKA. SST was also responsive to treatment in patients after TKA, with improvements in time for test completion. Performance on the SST differed between limbs of patients after TKA, as well as in the comparison of limbs of healthy controls to the limbs of patients after TKA.
Disclosure: The researchers had no relevant financial disclosures.]
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