Annals of the rheumatic diseases
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To determine the 2 year total hip replacement (THR) rate and to identify factors predictive of THR due to primary osteoarthritis (OA). ⋯ The 2 year rate of THR was high in this group of patients with painful hip OA: 37.4%. Radiological grade, mean patient global assessment, and the need for NSAIDs were predictive of THR.