A Comparison Between 3 Functional Hip Scores for Evaluation of the Pediatric Hip.

BACKGROUND: This investigation aimed to determine the degree of correlation among 3 functional scales for evaluating the hip in pediatric patients and determine the correlation between measures of global function and outcome. METHODS: We performed a prospective study of 173 consecutive patients (M age = 13 ± 3 y) being followed for developmental dysplasia of the hip (n = 122, 71%), slipped capital femoral epiphysis (n = 31, 18%), or Legg-Calve-Perthes disease (n = 20, 12%). We evaluated patients clinically, and we compiled scores for the Iowa Hip Score (IHS), Harris Hip Score (HHS), and Children's Hospital Oakland Hip Evaluation Scale (CHOHES). Patients concomitantly completed the Pediatric Outcomes Data Collection Instrument (PODCI) at the same clinic visit. We assessed Global Functioning Scale the and the Sports and Physical Functioning Core Scale of the PODCI. We determined the degree of correlation between the functional hip scales and between each scale and the PODCI scales using Spearman rank correlation coefficients. RESULTS: The correlations between the IHS, HHS, and CHOHES scores were robust (IHS and HHS ρ = 0.991; IHS and CHOHES ρ = 0.933; HHS and CHOHES ρ = 0.938; all P < 0.001). The correlation between the Global Functioning Scale of the PODCI and the 3 hip scores was ρ = 0.343 for the IHS, ρ = 0.341 for the HHS, and ρ = 0.352 for the CHOHES (all P < 0.001). The correlation between the sports and physical functioning core scale of the PODCI and the 3 hip scores was ρ = 0.324 for the IHS, ρ = 0.329 for the HHS, and ρ = 0.346 for the CHOHES (all P < 0.001). CONCLUSIONS: In a pediatric population with diverse hip pathology, there was a very strong correlation between scores on the IHS, HHS, and CHOHES. However, none of these 3 most commonly used hip scores correlated strongly with the global functioning scale or sports and physical functioning core scale of the PODCI. The most frequently used scores to determine the outcome of pediatric patients with hip pathology correlate strongly with each other but do not necessarily relate to global functional results. LEVEL OF EVIDENCE: Level IV.

Citation analysis of the highest-cited articles on developmental dysplasia of the hip.

The purpose of this study is to determine the highest-cited articles on developmental dysplasia of the hip (DDH) and analyze their bibliometric characteristics. We searched the Web of Science (WoS) for articles with the highest number of citations on DDH and recorded their number of citations in WoS, Scopus, and Google Scholar (GS). We ranked and selected the top 100 cited articles. The average number of citations in WoS was 148 (range 66-638). The most-cited article in all databases was Crowe's total hip replacement cohort on DDH. The Journal of Bone and Joint Surgery American Volume (n = 35) had the most articles in the list, and the United States (n = 46) contributed with the most articles. The University of Bern had the most publications (n = 8). Most studies were therapeutic (n = 45) or diagnostic (n = 29). Hip preservation and arthroplasty investigations have had an increment in citations in recent decades. We provide an historical perspective on research conducted on DDH. A majority of the articles were observational and therapeutic. All databases had good correlation in the number of citations.

Total Hip Arthroplasty for Secondary Causes of Arthritis An Increase in Time and Money.

BACKGROUND: Total hip arthroplasty (THA) is a frequently performed, highly successful orthopedic procedure. Although primary osteoarthritis (PA) is the most common reason for (THA), there are several secondary conditions that lead to degenerative hip disease that are successfully treated with THA. The purpose of this study was to examine the incidence of these secondary causes of arthritis (SA) leading to THA and to compare the relative surgical costs, operating times, and hospital length of stay (LOS) for THA done for PA versus SA. METHODS: Electronic medical records from 836 continuous patients undergoing primary THA over a 2-year period were reviewed at a single high-volume joint arthroplasty center. Data obtained included age, sex, laterality, diagnosis leading to THA, surgical costs based on hospital fees, operating room time, and hospital LOS. Using operative reports, office visit notes, and radiology reports or images, patients were categorized into PA or SA groupings. PA was defined as osteoarthritis of no other known etiology, whereas SA was defined when a known underlying diagnosis led to degenerative joint disease of the hip. SA included hip dysplasia, post-traumatic arthritis (PTA), avascular necrosis (AVN), inflammatory arthropathy, Perthes disease, and slipped capital femoral epiphysis (SCFE). Means and proportions of the variables from both groups were analyzed and compared using t-tests and chi-squared tests where applicable. RESULTS: There were 599 patients in the PA group and 237 patients in the SA group. The SA group was significantly younger than the PA group (54.4 years versus 64.0 years; p = 0.0001). The SA cohort had significantly higher mean surgical costs ($29,662 versus $27,078; p = 0.0005), operating room times (189 minutes versus 179 minutes; p = 0.0042), and LOS (4.2 days versus 3.9 days; p = 0.0312). Within the SA group, the hip dysplasia subgrouping had the lowest cost and operating room time, whereas the PTA subgrouping had the highest cost and operating room time. CONCLUSIONS: More than a quarter of primary THAs are performed due to secondary arthritis, most commonly due to hip dysplasia. Cases of THA due to secondary arthritis are associated with significantly increased hospital costs, operating time, and postoperative length of stay compared to THA's performed for primary osteoarthritis. Patients with post-traumatic hip arthritis may contribute the highest economic burden and present the most complex cases for arthroplasty surgeons.