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Table 3 Comparison of pre- and post-operative HHS, HPS

From: High failure rate after Beta-tricalcium phosphate grafting for the treatment of femoral head osteonecrosis: a retrospective analysis

ARCO stageHipsPre-operationPost-operationP value
HHS/HPS
HHSHPSHHSHPS
IIb887.87 ± 2.0338.00 ± 5.1362.25 ± 16.0918.75 ± 8.350.004/0.003
IIc1681.50 ± 3.6130.63 ± 2.5060.88 ± 18.6116.88 ± 8.730.001/<  0.001
IIIa2373.09 ± 2.4520.43 ± 2.0944.04 ± 8.1211.30 ± 3.44<  0.001/<  0.001
Total4778.47 ± 6.3926.89 ± 7.4352.87 ± 16.1414.47 ± 7.17<  0.001/<  0.001