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Table 3 Summary statistics between age-matched control and all DDH patients' hips

From: Cartilage contact pressure elevations in dysplastic hips: a chronic overload model

Peak Pressure (MPa) P-value Asymptomatic Mean ± S.D. DDH Mean ± S.D. Normal
Acetabulum   5.25 ± 1.02 6.59 ± 1.90 1.75
   Normal v. Asymptomatic 0.0339    
   Asymptomatic v Symptomatic 0.0729    
Femoral Head   6.11 ± 0.87 7.71 ± 2.41 1.89
   Normal v. Asymptomatic 0.0116    
   Asymptomatic v Symptomatic 0.0302    
Acetabulum v. Femoral Head 0.0021    
Cumulative Pressure (MPa)     
Acetabulum   3.67 ± 1.02 4.61 ± 1.40 1.15
   Normal v. Asymptomatic 0.0761    
   Asymptomatic v Symptomatic 0.0756    
Femoral Head   4.24 ± 0.81 5.39 ± 1.43 1.23
   Normal v. Asymptomatic 0.0268    
   Asymptomatic v Symptomatic 0.0762    
Acetabulum v. Femoral Head 0.0075    
Chronic Overpressure (MPa-sec/cycle)     
Acetabulum   2.20 ± 1.26 3.30 ± 1.77 0
   Normal v. Asymptomatic 0.1865    
   Asymptomatic v Symptomatic 0.0402    
Femoral Head   2.84 ± 1.02 4.08 ± 2.20 0
   Normal v. Asymptomatic 0.0642    
   Asymptomatic v Symptomatic 0.0758    
Acetabulum v. Femoral Head 0.0157    
Contact Area (mm 2 )     
Acetabulum   663 ± 55 569 ± 97 2233
   Normal v. Asymptomatic 0.0008    
   Asymptomatic v Symptomatic 0.2482    
Femoral Head   621 ± 53 614 ± 183 2265
   Normal v. Asymptomatic 0.0023    
   Asymptomatic v Symptomatic 0.7537    
Acetabulum v. Femoral Head 0.5993