marginal significanceP = 0.080
Risk factors for revision and mechanical failure In univariate analysis, the use of ASR implant, small-sized head, advanced stage (3B or 4), lateral extension (type C2) of osteonecrosis, and large Kerboul angle were all identified as significant risk factors of revision for any reason (P < 0.05), while female sex reached marginal significance (P = 0.080) ( Table 5 ).