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Incidence of periprosthetic infection following total hip arthroplasty by region of the United States. Values are shown for the regions, which had a significant difference. There was a significant difference in periprosthetic joint infections in two out of the four regions, Midwest and South (P = 0.013 and P = 0.007 respectively). NE: North East; MW: Mid West; WE: West; SO: South.
