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Table 3 Risk of revision for any reason

From: The risk of revision after total hip arthroplasty in young patients depends on surgical approach, femoral head size and bearing type; an analysis of 19,682 operations in the Dutch arthroplasty register

  Crude HR (95% CI) Adjusted HR (95% CI)a p-value b
Gender
 Female 1.02 (0.89–1.16) 1.09 (0.94–1.26) 0.27
Age 1.00 (0.99–1.01) 1.00 (0.99–1.01) 0.9
Year of surgery
 2007–2011 1 1
 2012–2016 0.94 (0.82–1.09) 1.13 (0.96–1.35) 0.14
ASA-classification
 ASA I 1 1
 ASA II 0.98 (0.85–1.13) 1.00 (0.85–1.16) 0.9
 ASA III-IV 1.24 (0.97–1.60) 1.25 (0.94–1.64) 0.12
Diagnosis
 Primary osteoarthritis 1 1
 Secondary osteoarthritisc 1.04 (0.91–1.20) 0.95 (0.81–1.12) 0.55
Surgical approach
 Posterolateral 1 1
 Anterior 0.52 (0.38–0.71) 0.66 (0.47–0.92) 0.01
 Direct lateral 0.82 (0.70–0.98) 0.86 (0.71–1.04) 0.12
 Anterolateral 1.05 (0.82–1.34) 1.16 (0.89–1.52) 0.27
Fixation
 Uncemented 1 1
 Cemented 1.15 (0.93–1.42) 0.91 (0.67–1.23) 0.54
 Hybrid 1.24 (0.75–2.08) 1.32 (0.74–2.35) 0.35
 Reversed hybrid 1.21 (0.96–1.52) 1.19 (0.91–1.55) 0.22
Head Diameter
 32 mm 1 1
 22–26 mm 1.54 (0.79–2.99) 1.49 (0.75–2.99) 0.26
 28 mm 1.21 (1.03–1.43) 1.11 (0.92–1.34) 0.28
 36 mm 1.02 (0.84–1.23) 1.14 (0.92–1.42) 0.22
 ≥ 38 mm 2.85 (2.27–3.57) 1.90 (1.33–2.72) < 0.001
Bearing type
 C-PE 1 1
 MoM 2.39 (1.94–2.94) 1.76 (1.27–2.43) < 0.001
 M-PE 1.06 (0.88–1.27) 1.02 (0.83–1.26) 0.83
 CoC 0.77 (0.61–0.97) 0.77 (0.60–1.00) 0.05
 Zr-PE 0.92 (0.67–1.28) 0.90 (0.64–1.25) 0.52
  1. aMultivariable Cox regression analysis performed with 17,288 observations and 741 events (complete cases); bp-value based on adjusted HR; cincludes dysplasia, osteonecrosis, (acute) fracture, inflammatory arthritis, late posttraumatic, Post-Perthes and rheumatoid arthritis