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Table 2 Patient number required for minimum MCID in Oxford Hip Score at different power levels.

From: A randomised controlled trial of total hip arthroplasty versus resurfacing arthroplasty in the treatment of young patients with arthritis of the hip joint

  MCID = 5 MCID = 7
Power 80% 90% 80% 90%
Sample size 52 69 27 36
  1. MCID: Minimum clinically important difference