Article

PURPOSE: To evaluate the validity of a modified version of the Orthotics and
Prosthetics Users' Survey (OPUS) with persons using different prosthetic and
orthotic (P&O) devices. METHOD: Two-hundred-and-eighty-two adults using
prosthesis, orthosis, shoe insoles or orthopaedic shoes completed OPUS. OPUS
comprises five modules - Lower and Upper Extremity Functional Status,
respectively (LEFS and UEFS), Client Satisfaction with Device and Services,
respectively (CSD and CSS), and, Health-Related Quality of Life (HRQoL). Eight
new items were added to LEFS and six to UEFS. Rasch analysis was used for data
analyses. RESULTS: Rating scales functioned satisfactory after some
modifications. All modules demonstrated a ceiling effect. Unidimensionality was
satisfactory after deleting some items and dividing HRQoL into two subscales,
although somewhat weak on CSD and CSS. Item reliability was excellent for all
modules and person reliability good for all but CSD and CSS. Some items
demonstrated differential item functioning related to sex and age, but the impact
on person measures was small. CONCLUSIONS: This study supports the validity of a
modified version of OPUS for persons using different P&O devices, but also
reveals limitations to be addressed in future studies. OPUS could be useful in
clinical rehabilitation and research to evaluate P&O outcomes.

Langue : ANGLAIS