Number of Patient-Reported Allergies and Other Mental Health Measures Correlate With Symptom Severity at Time of Hip Arthroscopy for Femoroacetabular Impingement Syndrome.

Purpose: To determine whether patient-reported allergies (a proposed indirect measure of mental health) or direct measures of mental health are associated with preoperative symptom scores, as measured by the 12-item International Hip Outcome Tool (iHOT-12) in patients undergoing hip arthroscopy for femoroacetabular impingement syndrome. Methods: This retrospective study analyzed prospectively collected data from consecutive patients undergoing outpatient hip arthroscopy for femoroacetabular impingement syndrome by a single surgeon. Patients completed the iHOT-12 preoperatively. Number of allergies, medication classes with allergic reactions, and reaction types were documented. Mental health was assessed via pre-existing psychiatric diagnoses, EQ-5D-5L anxiety/depression score, and Mental Health Inventory-5 (MHI-5) score. Associations between mental health measures (including allergies) and iHOT-12 scores were determined using bivariate and multivariate regression with forward selection. Results: Ninety-one patients were included (69.2% male, 30.8% female), with a mean age of 36.6 (±13.7) years. In bivariate analysis, mental health measures associated with lower iHOT-12 scores were number of allergies (-1.91 per allergy, SE = 0.62; Conclusions: Number of self-reported allergies is a simple, easily accessible measure that clinicians can use as a proxy measure of mental health that is predictive of patient-reported outcome measures prior to hip arthroscopy. Level of Evidence: Level III, Retrospective cross-sectional.