Minimal clinically important difference of Ibadan knee hip osteoarthritis outcome measure (IKHOAM) a cross-sectional study
Akinpelu, A. O.; Odole, A. C.; Raheem, S.
Journal of Physical Therapy
Background: The Ibadan Knee/Hip Osteoarthritis Outcome Measure (IKHOAM) is a Nigerian culture and environment-friendly clinical instrument for assessing the end result of therapeutic interventions in patients with Knee or hip osteoarthritis. Establishing Minimum Clinically Important Difference (MCID) for an instrument is important because it enhances the interpretability of the score of an instrument. This study was therefore conducted to establish MCID for Ibadan Knee Hip Osteoarthritis Outcome Measure (IKHOAM).Methods: 124 patients with knee/hip osteoarthritis (61 in anchor-based group and 63 in distribution-based group) recruited from physiotherapy outpatient clinics of government hospitals in Kano state participated in ex-post facto cross-sectional study. They were assessed on IKHOAM before and at the end of 8 weeks of physiotherapy. Participants in the anchor-based group reported their global rate of change in Activities of Daily Living function using a Likert-type scale and only 15 of them indicated minimal change. The mean change in IKHOAM scores pre and post 8-weeks of physiotherapy of these 15 participants was calculated as the MCID for the IKHOAM. The Standard Error of Measurement (SEM) was calculated for the participants in distribution-based group and this served as the second MCID for the IKHOAM. The larger value of the two was taken as the MCID for IKHOAM.Results: Participants (23 males and 101 females) were aged 59.2+/-11.5 years. The MCID for IKHOAM in anchor-based group was 12.89. The MCID for IKHOAM in distribution-based group is 2.58 for IKHOAM. The larger value of 12.89 was taken as MCID of IKHOAM. Conclusion: This study has provided the MCID (12.89) of IKHOAM which is the benchmark of the minimum quantity of the clinical improvement that is important to patient and the clinician. IKHOAM is therefore recommended for use in clinical settings and research.