Poster 353: LOWER PSYCHOLOGICAL READINESS FOR RETURN TO SPORT AFTER ACL RECONSTRUCTION IS ASSOCIATED WITH REDUCED PERFORMANCE AND GREATER LIMB ASYMMETRY ON FUNCTIONAL TESTING

Objectives: The relationship between psychological and physical readiness for return to sport after anterior cruciate ligament reconstruction (ACLR) is not well understood. Psychological stress were therefore evaluated at six months following primary ACLR along with standard functional patient reported outcome (PRO) instruments performance tests understand the in young athletes. Methods: Participants Hospital Special Surgery Pediatric Functional Activity Brief Scale (HSS Pedi-FABS), International Knee Documentation Committee Questionnaire (IKDC), PROMIS Stress Experience (PSE) ACL Return Sport After Injury (ACL-RSI). testing included gluteal, hamstring, quadriceps strength testing, single leg hop (SLH), crossover hop, triple timed 6-meter SLH. Patient characteristics continuous categorical variables summarized. Pearson’s correlation coefficient multivariable regression used determine associations limb symmetry index (LSI) on PROs. Those LSI deficits of less than 20% (better performance) then compared those greater (worse performance). Results: 229 participants (89 male, 140 female) median age 17 years (range 10.3 30.6 years) enrolled. IKDC had a moderate negative PSE (r=0.39 ; 95% CI=-0.49, -0.27; p<0.001) positive ACL-RSI (r=0.55; CI=0.46, 0.64; (Figure 1). 151 patients completed testing. demonstrated SLH (r=0.21;95% CI=0.05, 0.35; p=0.01) (r=0.28; CI, 0.42; p=0.001) 2). When controlling sex, age, graft type, who deficit scored 17.9 points higher (p<0.001), average 13.9 (p=0.04). Conclusions: At 6 ACLR, highe r associated better suggesting potential link recovery.