Validity and internal consistency of a Yoruba version of the Ibadan knee/hip osteoathritis outcome measure (Yoruba IKHOAM).

The Ibadan Knee Hip osteoarthritis Outcome measure (IKHOAM) was developed for patients with Knee/Hip Osteoarthritis in the Nigerian and similar environments. The Yoruba Version was developed to encourage its use in the Southwestern region of Nigeria. The IKHOAM was translated into Yoruba in four separate processes of translation, back translation, committee review and pre-testing. It was administered to a cohort of 164 outpatients with symptomatic OA of the knee and or Hip who attended physiotherapy units in selected hospitals from Southwestern region of Nigeria. The IKHOAM (English Version) was correlated with the Yoruba version and Visual analogue scale (VAS). The Validity of the Yoruba IKHOAM was found to be satisfactory and comparable to the original version (r = 0.67, p = 0.005) for the criterion-related validity and r = -0.31 (p = 0.005) for construct validity. The items in the Yoruba IKHOAM correlated well with each other with Cronbach's alpha coefficient ranging between 0.69 and 0.99. The correlation on the different parts of the Yoruba IKHOAM was satisfactory (alpha = 0.52-0.87). The Yoruba IKHOAM like the original version is a reliable consistent and valid instrument that can be considered for use in the Nigeria environment for evidence based quality healthcare promotion in Knee/Hip OA patients.