Patient-Reported Outcomes Measurement Information System (PROMIS) in Femoroacetabular Impingement (FAI)

Abstract

Objectives: Patient-Reported Outcomes Measurement Information System (PROMIS) is an NIH-funded computerized adaptive test (CAT) developed to effectively assess patient outcomes in multiple domains, including physical function (PF), pain severity, and quality of life while minimizing patient burden. The purpose of this study is to validate PROMIS in patients undergoing hip arthroscopy for Femoroacetabular Impingement (FAI), including test-retest reliability and correlation with validated hip outcome measures. Methods: Patients undergoing elective hip arthroscopy for FAI were consecutively enrolled at a major academic center. Patients with chronic comorbidities, bilateral FAI with a staged approach, and lack of postoperative follow-up were excluded. Eligible patients completed the modified Hip Harris Score (mHHS), Hip Outcome Score Activities of Daily Living (HOS-ADL), International Hip Outcome Tool (iHOT-12), and PROMIS including PF, pain interference, and activity satisfaction. Questionnaires were completed preoperatively, two, and six weeks postoperatively. Ceiling effects were determined to be present if greater than 15% of patients scored the highest possible score on one of the patient reported outcome measurement tools in this study. The correlation of preoperative values with postoperative function were assessed utilizing the Pearson coefficient. Normality was evaluated using the Shapiro-Wilk test. Dependent sample t-tests were utilized to compare means in test-retest reliability. Results: There were 38 patients with a mean age of 29.3 ± 8.9 years (54% female) identified for the study. PROMIS demonstrated excellent correlation with HOS-ADL (Pearson coefficient of 0.81, Figure 1), as well as mHHS (0.80) and iHOT-12 (0.73). Patients with higher PROMIS-pain interference and pain intensity scores demonstrated a negative linear correlation with mHHS (r=-0.86, p<0.05), HOS-ADL (r=-0.71, p<0.05), and iHOT-12 (-0.71, p<0.01). PROMIS scores exhibited significant responsiveness to hip arthroscopy. Patients with higher activity satisfaction demonstrated excellent-good correlation with mHHS scores (r=0.66, p<0.05) and HOS-ADL (0.66, p<0.05). PROMIS also demonstrated excellent test-retest reliability with no variability in scores, including PF (55.5 ± 8.6 vs. 54.2 ± 10.5, p=0.74). No floor or ceiling effects were exhibited by PROMIS including the physical function, pain interference, pain intensity, social participation, and role satisfaction domain scores. Conclusion: PROMIS is a valid and efficient PRO in hip arthroscopy for FAI demonstrating excellent test-retest reliability and correlation with established hip outcome measures. No floor or ceiling effects were demonstrated by PROMIS. Subdomains also exhibit excellent prognostic ability in the clinical setting.