Table 3 Risk of revision for any reason
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 |