Psychometric Properties of the Hip-Return to Sport After Injury Scale (Short Form) for Evaluating Psychological Readiness to Return to Sports After Arthroscopic Hip Surgery.

BACKGROUND: Successful return to sports activity after surgery requires both physical and psychological readiness. The Hip-Return to Sport After Injury (Short Form) has been developed to assess psychological readiness to return to sports after hip injury and hip surgery, including hip arthroscopy. PURPOSE: To evaluate the reliability, validity, responsiveness, and interpretability of the scale for a cohort of patients after hip arthroscopy with a range of sports participation levels. STUDY DESIGN: Cohort study (diagnosis); Level of evidence, 2. METHODS: Invitations to participate were sent to 145 patients from 3 specialist surgeons. The study included 77 participants 1 to 24 months after hip arthroscopy (mean ± SD age, 35 ± 9 years; 62% women) and 33 healthy age-matched controls (age, 37 ± 7 years; 52% women). The scale was administered electronically on 3 occasions to patients: baseline (≥1 month postarthroscopy), 1 week later, and 6 months later. In addition to the scale, participants were asked about sports participation status and their global rating of postsurgical change. The scale was administered to healthy controls on 1 occasion. The minimal detectable difference, discriminant validity, floor and ceiling effects, responsiveness, and interpretability (minimally important change) were determined for the scale. RESULTS: Among the postarthroscopy group, excellent test-retest reliability was found (intraclass correlation coefficient = 0.869; 95% CI, 0.756-0.932) with a minimal detectable difference of 26 points out of 100 at the individual level and 4 points out of 100 at the group level. At baseline discriminant validity was evident between those who had returned to sports (median = 69, n = 35) and those who had not returned to sports (median = 30, n = 42; Mann-Whitney U score = 232.5, z = -5.141, P < .001) and between the returned-to-sports postarthroscopy group and healthy controls (median = 96, n = 33; Mann-Whitney U score = 165.500, z = 5.666, P < .001). No floor or ceiling effects were evident. Responsiveness was demonstrated for the scale in relation to sports status. With sports status as an anchor, a minimally important change of 26 points was identified. CONCLUSION: Assessment of the Hip-Return to Sport After Injury (Short Form) supports its use as a reliable and valid measure of psychological readiness to return to sports in patients after hip arthroscopy.

Acute and Subacute Changes in Hip Strength and Range of Movement After Arthroscopy to Address Chondrolabral Pathology.

BACKGROUND: Hip pain is associated with reduced muscle strength, range of movement (ROM), and function. Hip arthroscopy is undertaken to address coexistent intra-articular pathologies with the aim of reducing pain and improving function. PURPOSE: To evaluate changes in strength and ROM in a cohort with chondrolabral pathology before surgery to 3 and 6 months after hip arthroscopy. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Sixty-seven individuals with hip pain who were scheduled for hip arthroscopy were matched with 67 healthy controls. Hip strength and ROM were collected preoperatively and at 3 and 6 months postoperatively. Repeated measures analysis of variance evaluated whether strength and ROM differed between limbs and among time points. Bonferroni post hoc tests determined differences in hip strength and ROM among testing times and between the hip pain group and matched controls. RESULTS: Hip extension, internal rotation (IR), external rotation (ER), and adduction (P < .040) strength were greater at 3 months after surgery; all directions, including flexion, abduction, and squeeze, were greater at 6 months (P < .015). Hip flexion ROM was greater at 3 months after surgery (P = .013). Flexion, IR, and ER ROM was greater at 6 months (P < .041). At 6 months, IR ROM (P = .003) and flexion, IR, and ER strength (P < .005) remained less than matched controls. CONCLUSION: With the exception of squeeze and flexion, all directions of hip strength and hip flexion ROM are significantly improved 3 months after arthroscopy to address chondrolabral pathology. By 6 months after arthroscopy, strength in all directions and flexion and rotation ROM are significantly improved in both limbs, but hip flexion, IR, and ER strength and IR ROM remain significantly less than that of healthy matched controls in both limbs.