Validity and Reliability of the Thai Version of the Modified Harris Hip Score for Patients With Hip Abnormalities

The modified Harris Hip Score (mHHS) is one of the more commonly used patient-reported outcome measures to evaluate and monitor treatment in patients with hip abnormalities and has been translated into several languages.

To develop a Thai version of the mHHS (TH-mHHS) and evaluate the validity and reliability of the measure.

Cohort study (diagnosis); Level of evidence, 3.

The TH-mHHS was developed using the forward-backward translation method. Patients who presented with hip pain during the first clinic visit completed the Thai version of questionnaires including the mHHS, 36-item Short Form Health Survey (TH-SF36), and Hip disability and Osteoarthritis Outcome Score (TH-HOOS). The validity between the measures was tested using the Spearman correlation coefficient. The test-retest reliability of the TH-mHHS was assessed using the intraclass correlation coefficient, and internal consistency was assessed using the Cronbach alpha.

A total of 64 patients were enrolled who had a mean age of 52.8 ± 16.6 years (range, 17-80 years). There were 64% female and 36% male participants. The TH-mHHS showed a moderate correlation with all subscales of the TH-HOOS and the total TH-HOOS (r = 0.50-0.65; P < .01) and a high correlation with the physical functioning subscale and physical component summary of the TH-SF36 (r = 0.73 and 0.75, respectively; P < .01). The test-retest reliability was excellent, with an intraclass correlation coefficient of 0.95 (95% CI, 0.92-0.97; P < .001). The internal consistency was acceptable, with a Cronbach alpha of .71. No floor or ceiling effects were observed.

The TH-mHHS showed a moderate to high correlation with the TH-SF36 and TH-HOOS, excellent test-retest reliability, and acceptable internal consistency. This measure can be effectively used for evaluating Thai patients with hip disorders, especially an older and arthritic population.