Pre-op 3 months 6 months 12 months HHS         HRA 64.7 ± 8.1 92.5 ± 8.7* 98.4 ± 2.5 99.1 ± 1.6 THA 60.5 ± 10.1 98.5 ± 2.8 94.4 ± 4.9 99.9 ± 0.3 SF-36 PCS         HRA 38.8 ± 7.6 46.1 ± 7.1 46.4 ± 11.2 51.5 ±5.3 THA 38.9 ± 10.5 46.7 ± 10.8 45.3 ± 13.2 46.4 ± 11.9 SF-36 MCS         HRA 63.2 ± 3.7 58.6 ± 7.2 60.6 ± 5.3 58.3 ± 2.5 THA 58.5 ± 8.2 57.1 ± 6.0 57.3 ± 4.8 56.0 ± 4.1 UCLA         HRA 5.2 ± 1.1 6.9 ± 1.2 7.7 ± 1.0* 8.0 ± 1.4 THA 5.7 ± 1.7 7.1 ± 1.3 7.0 ± 1.4 7.6 ± 1.4 *difference between HRA and THA significant at P<0.05.

Table 2: outcome score results; Values presented as mean ± SD; HRAhip resurfacing arthroplasty; THA-total hip arthroplasty; HHS-Harris Hip Score; SF-36-Short Form 36; PCS-physical component scale; MCS-mental component scale; UCLA-University of California at Los Angeles.