Validation of the Mayo Hip Score: construct validity, reliability and responsiveness to change.

Hazard ratios of revision surgery were higher with lower final score or less improvement in Mayo hip score at 2-years and borderline significant/non-significant at 5-years, respectively: (1) score ≤55 with hazard ratios of 2.24 (95 % CI, 1.45, 3.46; p = 0.0003) and 1.70 (95 % CI, 1.00, 2.92; p = 0.05) of implant revision subsequently, compared to 72-80 points; (2) no improvement or worsening score with hazard ratios 3.94 (95 % CI, 1.50, 10.30; p = 0.005) and 2.72 (95 % CI, 0.85,8.70; p = 0.09), compared to improvement >50-points.

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Association with Subsequent Implant Revision: Mayo hip scores of 55 or lower at 2-years were significantly associated with higher risk of THA revision at 2-years ( p = 0.0003) and with borderline significance at 5-years ( p = 0.05), the risk being 2-times compared to those with score 72–80 points (Table 2 ).

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