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Table 3 Results of the multivariable Cox regression analysis for the risk of ARMD in the THR cohort

From: Femoral diameter and stem type are independent risk factors for ARMD in the Large-headed ASR THR group

   Unilateral THRs   All THRs  
Variable   HR (95% CI)   HR (95% CI)  
Sex Male 1.0 (ref) p = .3 2.0 (ref) p = .6
1.26 (0.47 – 3.31)
Female 1.82 (0.63 – 5.21)
Age <50 years 1.03 (0.35 – 3.06) p = .9 1.32 (0.56 – 3.12) p = .5
1.0 (ref)
≥50 years 1.0 (ref)
Diagnosis OA 1.11 (0.52 – 2.33) p = .8 1.29 (0.68 – 2.44) p = .4
1.0 (ref)
Other 1.0 (ref)
Cup coverage <25 degrees 1.0 (ref) p = .2 1.0 (ref) p = .5
1.28 (0.63 – 2.60)
≥25 degrees 1.73 (0.70 – 4.33)
Stem Summit 1.0 (ref) p = .04 p = .035 2.0 (ref) p = .061
1.73 (0.97 – 3.06) p = .16
Corail 2.17 (1.03 - 4.56) 0.50 (0.19 – 1.31)
Other 0.26 (0.08 - 0.91)
Femoral diameter 2 mm 1.16 (1.01 - 1.34) p = .035 1.04 (0.94 - 1.15) p = .5
increment  
Preoperative ROM <100 degrees 1.0 p = .3 1.0 p = .16
1.46 (0.86 – 2.50)
≥100 degrees 1.39 (0.68 – 2.82)