Yeo MGH, Goh GS, Chen JY, et al. - The present study was sought to evaluate the minimal clinically important difference (MCID) thresholds for OHS, WOMAC and the Short Form-36 (SF-36) Mental (MCS) and Physical Component Summary (PCS) scores and distinguish the threshold values of these patient-reported outcome measures that could be used to predict patient satisfaction and expectation fulfilment. Researchers examined prospectively collected registry data of 1334 primary total hip arthroplasty patients who returned for 2-year follow-up from 1998-2016. They analyzed all patients pre- and postoperatively at 2 years applying the OHS, WOMAC and SF-36 PCS/MCS scores. They estimated MCID for each PROM and recorded the proportion of patients that attained MCID. Spearman rank correlation was applied to evaluate the association between satisfaction, expectation fulfilment and MCID attainment. Receiver Operating Curve analysis was applied to estimate optimal threshold scores for each PROM that predicted MCID attainment and Satisfaction/Expectation fulfilment at 2 years. The data showed that OHS and WOMAC scores can be applied to ascertain clinical meaningful improvement, but are limited in their ability to prognosticate patient satisfaction after total hip arthroplasty.