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Table 1 Distribution of development of heterotopic ossifications (HO) among patients by rank

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

Character Rank Presence of HO (%) Absence of HO (%) p values
Age   Mean age = 77.6 years Mean age = 80.2 years 0.0018
Sex Male 64.4 35.6 0.1011
Female 57.7 42.3
Diagnosis of diseased hip Coxarthrosis 72.7 27.3 0.0001
Femoral neck fracture 55.9 44.1
Others 82.9 17.1
Previous HO Presence 76.2 23.8 0.0260
Absence 58.8 41.2
Surgical approach to the hip Watson-Jones 55.6 44.4 0.0163
Hardinge-Bauer 65.5 34.5
Kind of implant Ceramic-ceramic THR 68.1 31.9 0.0001
Partial prosthesis 51.3 48.7
TriboFit® system 67.0 33.0
Previous surgery of the ipsilateral hip (only among ceramic-ceramic THR) Presence 75.0 25.0 0.4896
Absence 67.5 32.5