Evaluation of psychometric properties of Tinetti performance-oriented mobility assessment scale in subjects with knee osteoarthritis.
Huma Parveen, Majumi M Noohu
PMID 30931036WHAT IT FOUND
In 25 people with knee osteoarthritis, the Tinetti POMA scores stayed stable over 5 days, but they only matched other balance and mobility tests moderately.
Many participants scored at the top, so it may not detect change in mild cases.
Key findings
01In 25 people with knee osteoarthritis, POMA balance scores correlated moderately with Berg Balance Scale scores (r_s=0.63, p=0.001), while POMA gait scores correlated negatively with Timed Up and Go times (r_s=-0.481, p=0.02).
02The total POMA, balance subscale, and gait subscale showed high intrarater reliability, with ICC values of 0.98, 0.96, and 0.98.
03A ceiling effect was present: 28% reached the maximum total POMA score, 24% reached the maximum gait subscale score, and 20% reached the ceiling on the Berg Balance Scale.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
Only 25 people were recruited by convenience from the Department of Physiotherapy, Jamia Millia Islamia and ESI Hospital, Okhla, New Delhi, so the findings may not generalise to a broader knee osteoarthritis population. Most participants were mobile and highly functional, and there were no individuals with severe Kellgren-Lawrence grade 4 knee osteoarthritis, so the results may not apply to more impaired patients. Scores clustered near the maximum, with ceiling effects on the total POMA, POMA gait subscale, and Berg Balance Scale. This limits usefulness when monitoring change. Only intrarater reliability was assessed by one physiotherapist, so the study does not show whether different therapists would score the POMA similarly. The study did not test responsiveness or predictive value.
The easy way to misread this
Do not conclude that the Tinetti POMA is a proven outcome measure for detecting change in all knee osteoarthritis patients. It was tested for reliability and validity in 25 mostly mobile participants with mild knee osteoarthritis, not for responsiveness, and many scores reached the ceiling.