Percentage of patients 18 years of age and older who obtained at least a minimal clinically important difference (MCID) in hip pain or function as measured by validated patient-reported outcome measures (PROMs) completed up to 90 days prior to and at least one year after undergoing primary total hip arthroplasty (THA) surgery. PROMs include hip-related measures of pain and function (HOOS-Pain, HOOS-PS, HOOS-JR).