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Table 1 Patient demographics as well as HO and complications divided by the type of THA approach used

From: Influence of surgical approach on heterotopic ossification after total hip arthroplasty – is minimal invasive better? A case control study

  Approach Total
Standard Minimally invasive  
STD Watson-Jones STD Bauer AMIS MIS-AL  
Gender
 Men 21 16 22 10 69
 Women 21 12 17 15 65
Mean age   42 28 39 25  
Comorbidities
 Previous THA 14 12 12 7 45
 Diabetes mellitus 5 5 7 5 22
 Cardiovascular diseases 24 15 22 15 76
 Osteoporosis 5 1 1 3 10
HO
 Grade 0 Count 23 24 30 19 96
% 19,0% 3,6% 7,7% 12,0%  
 Grade 1 Count 8 1 3 3 15
% 19,0% 3,6% 7,7% 12,0%  
 Grade 2 Count 5 2 4 1 12
% 11,9% 7,1% 10,3% 4,0%  
 Grade 3 Count 3 0 2 1 6
% 7,1% 0,0% 5,1% 4,0%  
 Grade 4 Count 3 1 0 1 5
% 7,1% 3,6% 0,0% 4,0%  
 Total Count 42 28 39 25 134
% 31,3% 20,9% 29,1% 18,7%  
Mean Stay in hospital 42 28 39 25  
Intraoperative complications 4 3 1 0 8
Early complications
 Bleeding 1 2 0 0 3
 Wound healing problems/infection 4 1 1 4 10
 Cardiovascular events 1 1 4 0 6
 Pulmonary embolism 0 0 1 0 1
 Postoperative anemia 42 28 39 25 134
 Urinary tract infection 5 1 0 0 6
Late complications
 Fracture 3 1 1 1 6
 Dislocation 0 2 1 0 3
 Loosening 1 0 0 0 1
 Leg length discrepancy 9 9 14 7 39
 Trendelenburg sign/muscular deficits 10 10 3 2 25
 Local sensory disturbances/pain 7 5 9 6 27
 Revision surgery 2 2 1 3 8