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Table 3 Distribution of development of heterotopic ossifications (HO) among patients by the grade of HO

From: Heterotopic ossification following hip arthroplasty: a comparative radiographic study about its development with the use of three different kinds of implants

Character Rank HO grade by Brooker classification (%) p values
1 2 3 4
Sex Male 26.5 28.7 34.5 10.3 0.0478
Female 39.0 26.8 28.7 5.5
Diagnosis of diseased hip Coxarthrosis 40.3 20.8 29.2 9.7 0.3278
Femoral neck fracture 33.6 28.4 32.1 5.9
Others 31.0 34.5 20.7 13.8
Previous HO Presence 40.6 38.4 15.6 9.4 0.2830
Absence 34.1 26.8 32.1 7.0
Surgical approach to the hip Watson-Jones 38.1 28.7 26.9 6.3 0.1738
Hardinge-Bauer 30.8 24.7 37.0 7.5
Kind of implant Ceramic-ceramic THR 37.2 25.6 26.9 10.3 0.0093
Partial prosthesis 35.2 33.3 27.1 4.4
TriboFit® system 28.0 18.7 46.7 6.6