Quinzi DA, Childs S, Kuhns B, et al. - The present study was conducted to investigate PROMIS Computer Adaptive Test scores for domains of physical function(PF) and pain interference(PI) in patients undergoing elective total hip arthroplasty (THA) from either a direct anterior(DA) or posterior surgical approach. Researchers distinguished a total of 1,358 patients who had undergone THA at our institution from 1/1/2015 to 12/1/2018. They obtained visual analog scale (VAS) pain scores, PROMIS CAT physical function(PF) and pain interference(PI) data at the last preoperative visit as well as 6 weeks, 6 months, and 1-2 years postoperatively. They further applied literature derived minimum clinically important difference(MCID) for PROMIS CAT PF metric with regards to THA for data comparison. This study recruited a total of 409 patients in the final analysis. The results indicate that neither the DA, nor posterior THA surgical procedure conferred a benefit to postoperative improvements of PROMIS CAT PF and PI scores. Based upon personal preference, adult reconstructive surgeons should continue to execute the direct anterior or posterior THA surgical techniques. The potential for future innovation exists given the number of THA patients who failed to achieve PROMIS PF MCID, despite surgeon confidence in THA.