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National trends of hip replacements according to hospital types in Korea from 2007 to 2011
*a, percentage in 2007; b, percentage in 2011. ‡Calculated by dividing total number of each procedure by total number of each hospital type; ‡The change is statistically significant (P<0.05). BH, bipolar hemiarthropalsty; THA, total hip arthroplasty.
