Identification of a Patient Acceptable Symptomatic State Score for the International Hip Outcome Tool in People Undergoing Hip Arthroscopy.

PURPOSE: To determine a Patient Acceptable Symptomatic State (PASS) score for the 33-item International Hip Outcome Tool (iHOT-33) in people undergoing hip arthroscopy for primary diagnoses of femoroacetabular impingement syndrome, acetabular labral tears, and/or ligamentum teres pathology. METHODS: Consecutive participants underwent hip arthroscopy by a single surgeon between August 2011 and May 2016. Participants were included if they were between ages 18 and 60 years and underwent hip arthroscopy for femoroacetabular impingement syndrome, acetabular labral tears, or ligamentum teres pathology. Participants were excluded if they did not speak sufficient English to complete the iHOT-33, had evidence of hip dysplasia, had less than 2 mm of joint space on anteroposterior radiograph, or underwent subsequent total hip replacement surgery. Participants completed the iHOT-33 preoperatively and at a minimum of 1 to a maximum of 5 years postoperatively. Participants were also asked to answer yes or no to the external anchor question of "Taking into account all the activities you do during your daily life, your level of pain and also your functional impairment, are you satisfied with your current state following your surgery?" A receiver operating characteristic (ROC) curve was used to identify the PASS score. Multiple logistic regression was performed to determine if patient factors, primary preoperative diagnosis, or intraoperative findings predicted achievement of the PASS score. RESULTS: A total of 117 participants undergoing hip arthroscopy were included: 72 women (61.1%) and 45 men (38.5%) with mean age of 36.81 years (18-59). Forty-two (35.9%) had cam morphology, 18 (15.4%) had pincer morphology, 78 (67.2%) had labral tears, and 97 (82.9%) had ligamentum teres tears. Mean time to final follow-up was 2.25 years (range, 1-5). The PASS score at a mean of 2.25 years postoperatively was 58 as determined by the cutoff threshold on the ROC curve with the lowest difference between sensitivity and specificity (area under the ROC curve 0.88; P < .01; 95% confidence interval [CI], 0.81-0.95). No factors were predictors of achievement of the PASS score in this study (P > .05), including age (odds ratio [OR], 0.71; 95% CI, 0.32-1.56), sex (OR, 1.02; 95%, CI 0.98-1.06), preoperative iHOT-33 score (OR, 1.002; 95% CI, 0.98-1.03), primary preoperative diagnosis (OR, 0.86; 95% CI, 0.53-1.40), cam morphology (OR, 1.19; 95% CI, 0.54-2.64), Pincer morphology (OR, 0.50; 95%, CI 0.18-1.38), acetabular labral tears (OR, 1.93; 95% CI, 0.88-4.26), Outerbridge grade 3-4 chondral damage (OR, 0.97; 95% CI, 0.42-2.25), and ligamentum teres pathology (OR, 0.95; 95% CI, 0.35-2.61). CONCLUSIONS: This study reports a PASS score of 58 for the iHOT-33 at 2 years following hip arthroscopy. The PASS score will assist in assessing response to hip arthroscopy in research and clinical settings. LEVEL OF EVIDENCE: Level II, retrospective prognostic study.

An investigation of the use of a numeric pain rating scale with ice application to the neck to determine cold hyperalgesia.

The presence of cold hyperalgesia is a predictor of poor health outcomes following whiplash injury. An appropriate clinical test to identify cold hyperalgesia may help in gauging the prognosis. A repeated measures, within subjects design was used. Sixty-three participants with chronic Whiplash Associated Disorder (WAD) (grade II and III) underwent testing at the cervical spine for sites of cold hyperalgesia with laboratory testing equipment, as well as a test of reported pain intensity on an 11 step numerical rating scale (NRS) after 10 s of ice application at the same sites. A receiver operating characteristic analysis was used to evaluate the ability of the ice application test to discriminate between cold hyperalgesic and non-cold hyperalgesic sites, as determined by the laboratory equipment. Pain sensation on ice application was significantly better than chance in discriminating between cold hyperalgesic and non-cold hyperalgesic sites (AUC 0.822 (95% CI 0.742-0.886); p < 0.0001). Sensitivities, specificities and likelihood ratios for different NRS values for pain intensity are presented. A pain intensity rating of >5 gave a positive likelihood ratio of 8.44 suggesting that if this value is reported, clinicians could be suspicious of the presence of cold hyperalgesia. This study demonstrates simple clinical test that may aid in gauging prognosis and guiding treatment decisions in people with WAD.