Hip OA is increasingly common with age. Those who develop hip OA in middle and old age are more likely to have a genetic predisposition to hip OA, while those who develop it at younger age are more likely to have an underlying developmental defect, or to have developed hip OA because of trauma or high levels of physical activity.
There is no clear evidence to show an increased risk for hip OA from military activity or general military sporting activity.
There is evidence to show an increased risk with frequent heavy manual activity and with frequent or prolonged standing.
There is evidence to show an increased risk for hip OA with elite sport, particularly running and contact sports.
There is evidence to show an increased risk following trauma to the hip joint.
Hip arthroplasty is a good treatment for hip OA with generally excellent outcomes. There is some evidence that joint resurfacing is more appropriate for the younger patient, and care should be taken in choice of prosthesis, probably avoiding ceramics as these may fail with impact activities. Most military activities are compatible with hip arthroplasty without significant increased risk.