Acute Total Hip Arthroplasty Following Acetabular Fracture is Associated With a High Risk of Revision, Dislocation, and Periprosthetic Fracture.

BACKGROUND: The aim of this study was to compare outcomes between acute, subacute, and delayed arthroplasty for acetabular fractures occurring within 1 week, from 1 week to 6 months, or more than 6 months before the index total hip arthroplasty (THA), versus THA without a history of acetabular fracture as a control. METHODS: We analyzed the records of patients undergoing primary THA who were enrolled in a national database for at least 2 years before and after the index procedure. Patients who had an initial diagnostic code for acetabular fracture occurring less than 1 week, from 1 week to 6 months, or at least more than 6 months before the THA were classified as acute THA (aTHA), subacute THA (saTHA), or delayed THA (dTHA), respectively. The control group was patients undergoing THA who did not have a history of acetabular fracture. There were 430,349 control primary THAs, 462 aTHAs, 675 saTHAs, and 1,162 dTHAs. RESULTS: After adjusting for age, sex, region, and comorbidities, patients who had an aTHA and saTHA experienced statistically significant increased odds of revision, dislocation, and periprosthetic fracture compared to primary THA without a history of acetabular fracture. Similarly, dTHA was associated with increased odds of revision, dislocation, and periprosthetic fractures compared to primary THA. In the multivariate analysis, aTHA had statistically significant higher rates of dislocation when compared to dTHA. CONCLUSIONS: Patients who had a history of acetabular fractures undergoing aTHA, saTHA, or dTHA have significantly increased rates of revision, periprosthetic fracture, and dislocation compared to primary THA in those who did not have a history of acetabular fractures.

Patient satisfaction and patient-reported outcomes do not vary by BMI class in total hip arthroplasty.

PURPOSE: Obesity has been identified as a risk factor for postoperative complications in patients undergoing total hip arthroplasty (THA). This study aimed to investigate patient-reported outcomes, pain, and satisfaction as a function of body mass index (BMI) class in patients undergoing THA. METHODS: 1736 patients within a prospective observational study were categorized into BMI classes. Pre- and postoperative Hip disability and Osteoarthritis Outcome Score for Joint Replacement (HOOS JR), satisfaction, and pain scores were compared by BMI class using one-way ANOVA. RESULTS: Healthy weight patients reported the highest preoperative HOOS JR (56.66 ± 13.35) compared to 45.51 ± 14.45 in Class III subjects. Healthy weight and Class III patients reported the lowest (5.65 ± 2.01) and highest (7.06 ± 1.98, p < 0.0001) preoperative pain, respectively. Changes in HOOS JR scores from baseline suggest larger improvements with increasing BMI class, where Class III patients reported an increase of 33.7 ± 15.6 points at 90 days compared to 26.1 ± 17.1 in healthy weight individuals (p = 0.002). Fewer healthy weight patients achieved the minimal clinically important difference (87.4%) for HOOS JR compared to Class II (96.5%) and III (94.7%) obesity groups at 90 days postoperatively. Changes in satisfaction and pain scores were largest in the Class III patients. Overall, no functional outcomes varied by BMI class postoperatively. CONCLUSION: Patients of higher BMI class reported greater improvements following THA. While risk/benefit shared decision-making remains a personalized requirement of THA, this study highlights that utilization of BMI cutoff may not be warranted based on pain and functional improvement.

Sex Disparities Among Fellowship Program Directors in Orthopaedic Surgery.

BACKGROUND: Women are underrepresented in the orthopaedic surgery workforce in the U.S. The purpose of this study was to elucidate the representation of women among fellowship program directors (PDs) in orthopaedic surgery. METHODS: This was a retrospective cohort study of fellowship PDs in orthopaedic surgery during the 2022 to 2023 academic year. Academic, training, and demographic characteristics were collected from internet-based resources. Participation-to-prevalence ratios (PPRs) were calculated for both men and women. A PPR of <0.8 indicated underrepresentation and a PPR of >1.2 indicated overrepresentation. Bivariate analyses were utilized to assess the correlation between sex diversity and geographic region and between sex diversity and Accreditation Council for Graduate Medical Education (ACGME)-accreditation status. The relationship between the median annual salary and the sex diversity of each orthopaedic subspecialty was analyzed with use of the Pearson correlation coefficient. RESULTS: This study included 600 fellowship PDs, 40 (6.7%) of whom were women. In total, 24.5% of the fellowship PDs were assistant professors (8.8% women versus 91.2% men, p < 0.001); 26.2% were associate professors (9.6% women versus 90.4% men, p < 0.001); 36.8% were full professors (4.5% women versus 95.5% men, p < 0.001); and 12.5% were unranked (2.7% women versus 97.3% men, p < 0.001). The representation of women increased with academic rank, as reflected in their prevalence at the assistant (PPR = 0.67), associate (PPR = 0.77), and full professor (PPR = 0.80) levels. Among the orthopaedic subspecialties, musculoskeletal oncology (19.0%), pediatric orthopaedics (14.6%), and hand surgery (12.6%) had the highest proportions of women fellowship PDs. PPRs were lowest for orthopaedic sports medicine (PPR = 0.35), shoulder and elbow (PPR = 0.45), and adult reconstruction (PPR = 0.52). Women PDs had equitable representation in musculoskeletal oncology (PPR = 1.17), hand surgery (PPR = 1.02), foot and ankle (PPR = 0.84), and orthopaedic trauma (PPR = 0.80). Median subspecialty compensation was negatively correlated with the prevalence of women among fellowship PDs (r = -0.70, p = 0.036). Geographic region was not associated with sex diversity (p = 0.434), but programs with ACGME accreditation had significantly more women fellowship PDs than those without (11.0% versus 3.9%, p < 0.001). CONCLUSIONS: Women are underrepresented among orthopaedic fellowship PDs, especially in certain subspecialties (orthopaedic sports medicine, shoulder and elbow, and adult reconstruction). More research is needed to understand the barriers that impact the representation of women among leadership positions in orthopaedic surgery. CLINICAL RELEVANCE: Greater sex diversity among fellowship PDs may help to increase the recruitment of women into orthopaedic subspecialties. The equitable consideration of orthopaedic surgeons from all backgrounds for leadership positions can increase workforce diversity, which may improve the vitality of the orthopaedic community.

Diversity of Backgrounds and Academic Accomplishments for Presidents Elected to Hip and Knee Arthroplasty Societies in the United States.

BACKGROUND: Academic accomplishments and demographics for presidents of hip and knee arthroplasty societies are poorly understood. This study compares the characteristics of presidents nominated to serve the Hip Society, Knee Society, and American Association of Hip and Knee Surgeons. METHODS: This was a cross-sectional study of arthroplasty presidents in the United States (1990 to 2022). Curriculum vitae and academic websites were analyzed for demographic, training, bibliometric, and National Institutes of Health (NIH) funding data. Comparisons were made between organizations and time periods (1990 to 2005 versus 2006 to 2022). RESULTS: There were 97 appointments of 78 unique arthroplasty presidents (80%). Most presidents were male (99%) and Caucasian (95%). There was 1 woman (1%) and 5 non-Caucasian presidents (2% Asian, 3% Hispanic). There were no differences in demographics between the 3 arthroplasty organizations and the 2 time periods (P > .05). Presidents were appointed at 55 ± 10 years old, which was on average 24 years after completion of residency training. Most presidents had arthroplasty fellowship training (68%), and the most common were the Hospital for Special Surgery (21%) and Massachusetts General Hospital (8%). The median h-index was 53 resulting from 191 peer-reviewed publications, which was similar between the 3 organizations (P > .05). There were 2 presidents who had NIH funding (2%), and there were no differences in NIH funding between the 3 organizations (P > .05). CONCLUSIONS: Arthroplasty society presidents have diverse training pedigrees, high levels of scholarly output, and similar demographics. There may be future opportunities to promote diversity and inclusion among the highest levels of leadership in total joint arthroplasty.

Impact of Chronic Opioid Use on Postoperative Mobility Recovery and Patient-Reported Outcomes: A Propensity-Matched Study.

BACKGROUND: Opioid use prior to total joint arthroplasty may be associated with poorer postoperative outcomes. However, few studies have reported the impact on postoperative recovery of mobility. We hypothesized that chronic opioid users would demonstrate impaired objective and subjective mobility recovery compared to nonusers. METHODS: A secondary data analysis of a multicenter, prospective observational cohort study in which patients used a smartphone-based care management platform with a smartwatch for self-directed rehabilitation following hip or knee arthroplasty was performed. Patients were matched 2:1 based on age, body mass index, sex, procedure, Charnley class, ambulatory status, orthopedic procedure history, and anxiety. Postoperative mobility outcomes were measured by patient-reported ability to walk unassisted at 90 days, step counts, and responses to the 5-level EuroQol-5 dimension 5-level, compared by Chi-square and student's t-tests. Unmatched cohorts were also compared to investigate the impact of matching. RESULTS: A total of 153 preoperative chronic opioid users were matched to 306 opioid-naïve patients. Age (61.9 ± 10.5 versus 62.1 ± 10.3, P = .90) and sex (53.6 versus 53.3% women, P = .95) were similar between groups. The proportion of people who reported walking unassisted for 90 days did not vary in the matched cohort (87.8 versus 90.7%, P = .26). Step counts were similar preoperatively and 1-month postoperatively but were lower in opioid users at 3 and 6 months postoperatively (4,823 versus 5,848, P = .03). More opioid users reported moderate to extreme problems with ambulation preoperatively on the 5-level EuroQol-5 dimension 5-level (80.6 versus 69.0%, P = .02), and at 6 months (19.2 versus 9.3%, P = .01). CONCLUSIONS: Subjective and objective measures of postoperative mobility were significantly reduced in patients who chronically used opioid medications preoperatively. Even after considering baseline factors that may affect ambulation, objective mobility metrics following arthroplasty were negatively impacted by preoperative chronic opioid use.

Analysis of Academic Accomplishments and Demographics for Elected Presidents of National Orthopedic Surgery Organizations in the United States.

This study analyzed the academic accomplishments and demographics of elected presidents of the American Academy of Orthopaedic Surgeons (AAOS), American Orthopaedic Association (AOA), and American Board of Orthopaedic Surgery (ABOS). Curriculum vitae and internet-based resources were reviewed to collect demographics, training characteristics, bibliometrics, and National Institutes of Health (NIH) research funding of contemporary presidents (1990-2020). Eighty presidents were included. Most presidents were men (97%), and 4% of presidents were non-White (3% Black and 1% Hispanic). Few had an additional graduate degree (4% MBA, 3% MS, 1% MPH, 1% PhD). Ten orthopedic surgery residency programs trained 47% of these presidents. Most had fellowship training (59%), and the top three were hand surgery (11%), pediatric orthopedics (11%), and adult reconstruction (10%). Twenty-nine presidents (36%) participated in a traveling fellowship. The mean age at appointment was 58±5 years, which was 27 years since residency graduation. The mean h-index was 36±23, resulting from 150±126 peer-reviewed manuscripts. Orthopedic surgery presidents had more peer-reviewed manuscripts (150±126) than chairs (73±81) and program directors (27±32) (P<.001). AOA presidents had the highest mean h-index (42±21) compared with AAOS (38±27) and ABOS (25±16) presidents (P=.035). Nineteen presidents had NIH funding (24%). More presidents had NIH funding in the AOA (39%) and AAOS (25%) than the ABOS (0%) (P=.007). Orthopedic surgery presidents possess high levels of scholarly output. AOA presidents had the highest h-index values and prevalence of NIH funding. Females and racial minorities remain underrepresented at the highest levels of leadership. [Orthopedics. 2024;47(1):e45-e51.].

Trends in ACGME Accreditation of Orthopedic Surgery Fellowship Training.

Currently, most surgeons pursue subspecialty fellowship training. This study answers the following questions: (1) How does the rate of fellowship training in orthopedic surgery compare with that in other surgical specialties? (2) To what extent did adoption of Accreditation Council for Graduate Medical Education (ACGME) accreditation change from 2013 to 2021? Orthopedic subspecialties were analyzed for total number of fellowship programs and positions in the 2013 and 2021 Match. Rates of ACGME accreditation were analyzed via chi-square tests. In 2021, orthopedic surgery had the highest rate of fellowship selection (94%) relative to general surgery (77%), ophthalmology (66%), plastic surgery (63%), and otolaryngology (55%). Across all orthopedic subspecialties, the percentage of ACGME accreditation decreased among fellowship programs (53% in 2013 to 48% in 2021, P=.166) and positions (58% in 2013 to 50% in 2021, P<.001). Orthopedic sports medicine had the highest adoption of ACGME accreditation (100%), followed by hand surgery (99%), musculoskeletal oncology (67%), and pediatric orthopedics (56%). Significant increases in the adoption of ACGME accreditation were noted for orthopedic sports medicine (93% in 2013 to 100% in 2021, P=.016) and hand surgery (81% in 2013 to 99% in 2021, P<.001). There was a significant decrease in ACGME accreditation for adult reconstructive orthopedics (40% in 2013 to 24% in 2021, P=.042), driven by the increase in unaccredited fellowship programs. Accreditation of orthopedic subspecialty fellowship training has decreased with respect to the proportion of accredited training positions. More research is needed to understand the benefits of ACGME accreditation for fellowship training in orthopedic surgery. [Orthopedics. 2024;47(1):57-63.].

Management of Femoral Neck Fractures in Patients Age ≥50 Years by American Board of Orthopaedic Surgery Part II Examination Candidates.

OBJECTIVE: Assess associations between fellowship training, procedure, and performance in femoral neck fracture (FNF) surgery on adults by American Board of Orthopaedic Surgery (ABOS) Part II Examination candidates. SETTING: ABOS SCRIBE database exam years 2007-2020. PARTICIPANTS: 6,777 candidates performing 39,283 FNF surgeries on adults age ≥ 50 years. INTERVENTION: Fellowship training. MAIN OUTCOME MEASUREMENTS: Case volume; procedure performed: internal fixation (IF), hemiarthroplasty (HA), or total hip arthroplasty (THA); complications; readmission; reoperation. RESULTS: Over the observation period, fewer candidates reported FNF surgery (68% overall, -0.6%/year, R2=0.80) while more candidates reported fellowship training (87% overall, +1.4%/year, R2=0.81). The rate of any complication was significantly associated with fellowship training (32% overall, p<0.001). Readmission (12%, p=0.080) and reoperation (5%, p=0.531) were not significantly associated with fellowship training. The odds of any complication (odds ratio [OR]=-0.03 [95% CI -0.07 to -0.001] per 10 cases) and surgical complication (OR=-0.12 [95% CI -0.17 to -0.07] per 10 cases) were negatively associated with candidate FNF case volume. 3,396 THA for FNF were performed (8% of cases). THA use increased 25 cases/year (R2=0.83) and was associated with adult reconstruction (p<0.001) and oncology (p<0.001) fellowship training. Any complication of THA for FNF (32%, p=0.261), readmission (9% overall, p=0.321), and reoperation (5%, p=0.200) were not significantly associated with fellowship training. CONCLUSIONS: Between 2007-2020, femoral neck fracture surgery was performed by fewer ABOS Part II Examination candidates and there was greater use of THA. Over this time period there was a greater prevalence of fellowship training but complications were not associated with fellowship training. Complications were associated with FNF case volume. LEVEL OF EVIDENCE: Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Incidence, Microbiological Studies, and Factors Associated With Prosthetic Joint Infection After Total Knee Arthroplasty.

Importance: Despite the frequency of total knee arthroplasty (TKA) and clinical implications of prosthetic joint infections (PJIs), knowledge gaps remain concerning the incidence, microbiological study results, and factors associated with these infections. Objectives: To identify the incidence rates, organisms isolated from microbiological studies, and patient and surgical factors of PJI occurring early, delayed, and late after primary TKA. Design, Setting, and Participants: This cohort study obtained data from the US Department of Veterans Affairs (VA) Corporate Data Warehouse on patients who underwent elective primary TKA in the VA system between October 1, 1999, and September 30, 2019, and had at least 1 year of care in the VA prior to TKA. Patients who met these criteria were included in the overall cohort, and patients with linked Veterans Affairs Surgical Quality Improvement Program (VASQIP) data composed the VASQIP cohort. Data were analyzed between December 9, 2021, and September 18, 2023. Exposures: Primary TKA as well as demographic, clinical, and perioperative factors. Main Outcomes and Measures: Incident hospitalization with early, delayed, or late PJI. Incidence rate (events per 10 000 person-months) was measured in 3 postoperative periods: early (≤3 months), delayed (between >3 and ≤12 months), and late (>12 months). Unadjusted Poisson regression was used to estimate incidence rate ratios (IRRs) with 95% CIs of early and delayed PJI compared with late PJI. The frequency of organisms isolated from synovial or operative tissue culture results of PJIs during each postoperative period was identified. A piecewise exponential parametric survival model was used to estimate IRRs with 95% CIs associated with demographic and clinical factors in each postoperative period. Results: The 79 367 patients (median (IQR) age of 65 (60-71) years) in the overall cohort who underwent primary TKA included 75 274 males (94.8%). A total of 1599 PJIs (2.0%) were identified. The incidence rate of PJI was higher in the early (26.8 [95% CI, 24.8-29.0] events per 10 000 person-months; IRR, 20.7 [95% CI, 18.5-23.1]) and delayed periods (5.4 [95% CI, 4.9-6.0] events per 10 000 person-months; IRR, 4.2 [95% CI, 3.7-4.8]) vs the late postoperative period (1.3 events per 10 000 person-months). Staphylococcus aureus was the most common organism isolated overall (489 [33.2%]); however, gram-negative infections were isolated in 15.4% (86) of early PJIs. In multivariable analyses, hepatitis C virus infection, peripheral artery disease, and autoimmune inflammatory arthritis were associated with PJI across all postoperative periods. Diabetes, chronic kidney disease, and obesity (body mass index of ≥30) were not associated factors. Other period-specific factors were identified. Conclusions and Relevance: This cohort study found that incidence rates of PJIs were higher in the early and delayed vs late post-TKA period; there were differences in microbiological cultures and factors associated with each postoperative period. These findings have implications for postoperative antibiotic use, stratification of PJI risk according to postoperative time, and PJI risk factor modification.

The Impact of Post-graduate Year and Program Accreditation Status on In-Training Examination Performance in Orthopaedic Surgery.

Introduction  The progression of medical knowledge competency during surgical residency training is poorly understood. This study measures the acquisition of medical knowledge as orthopedic surgery residents advance during training and the impact of accreditation status on orthopedic in-training examination (OITE) performance. Methods  Orthopedic surgery residents taking the OITE during 2020 and 2021 were included. Residents were grouped into cohorts by post-graduate year (PGY) and Accreditation Council for Graduate Medical Education (ACGME) accreditation status. Comparisons were made with parametric tests. Results  Eight thousand eight hundred and seventy-one ACGME-accredited residents (89%) and 1,057 non-ACGME-accredited residents (11%) were evenly distributed by the PGY level (range, 19-21%). Residents in both ACGME- and non-ACGME-accredited residency programs had a significant increase in OITE performance at each PGY level (P<0.001). At ACGME-accredited programs, OITE performance increased from PGY1 (51%), PGY2 (59%), PGY3 (65%), PGY4 (68%), and PGY5 (70%) (P<0.001). There were progressively smaller percentage increases in OITE performance during accredited residency training (range, 2-8%), but this increase was linear in non-accredited residency training (range, 4%). At each PGY level, residents at accredited programs outperformed their counterparts at non-accredited programs (P<0.001). Conclusion OITE performance increases during residency training. Among ACGME-accredited residents, performance on the OITE progresses rapidly during junior years and plateaus during senior years. Residents in ACGME-accredited residency programs outperform their counterparts in non-accredited residency programs. More research is needed to understand optimal training environments that promote medical knowledge acquisition during orthopedic surgery residency.

Women Are Underrepresented Among Principal Investigators of Hip and Knee Arthroplasty Clinical Trials in the United States.

BACKGROUND: Leadership of clinical trials confers national recognition and promotes academic advancement. We hypothesized that women would be underrepresented among principal investigators (PIs) of hip and knee arthroplasty clinical trials in the United States. METHODS: A query of hip and knee arthroplasty clinical trials from 2015 to 2021 was performed on ClinicalTrials.gov. Clinical trials were included if they involved a U.S.-based orthopaedic-surgeon PI. We analyzed the sex representation of arthroplasty PIs among junior-level (assistant professor) and senior-level (associate or full professor) faculty. Participation-to-prevalence ratios (PPRs) were calculated by comparing the sex representation among arthroplasty PIs with that among academic arthroplasty faculty at institutions conducting hip and knee arthroplasty clinical trials. A PPR of <0.8 indicated underrepresentation and a PPR of >1.2 indicated overrepresentation. RESULTS: A total of 157 clinical trials involving 192 arthroplasty PIs were included. Of these PIs, only 2 (1.0%) were women. PIs were mostly funded by academic institutions (66%) and industry (33%). U.S. federal sources funded a minority (1%) of PIs. Of the 243 male arthroplasty faculty who were eligible, 190 men (78.2%) served as PIs. In contrast, of the 17 female arthroplasty faculty who were eligible, only 2 women (11.8%) served as PIs (p < 0.001). Across the entire cohort of arthroplasty PIs, women were underrepresented (PPR = 0.16), whereas men were equitably represented (PPR = 1.06). Women were underrepresented at the assistant professor (PPR = 0.0), associate professor (PPR = 0.52), and full professor (PPR = 0.58) levels. CONCLUSIONS: Women were underrepresented among PIs of hip and knee arthroplasty clinical trials, which may lead to disparities in academic promotion and advancement. More research is needed to understand the potential barriers to female leadership of clinical trials. Greater awareness and engagement are needed to create sex equity in clinical trial leadership for hip and knee arthroplasty research. CLINICAL RELEVANCE: The underrepresentation of women among arthroplasty PIs may lead to fewer options in surgical providers for patients and may limit access to musculoskeletal care for certain patient populations. A diverse arthroplasty workforce can promote attention to issues that disproportionately affect historically underrepresented and vulnerable patient populations.

Acquisition of Medical Knowledge Varies During Allopathic and Osteopathic Orthopedic Surgery Residency Training.

Currently, little is known about the differences in medical knowledge acquisition between osteopathic and allopathic orthopedic surgery residents. The purpose of this study was to determine the relationship between Orthopaedic In-Training Examination (OITE) performance and training pathway in orthopedic surgery. This was a retrospective cohort study of all orthopedic surgery residents taking the OITE during the 2019-2020 academic year. Comparisons in OITE performance were made with parametric tests. A total of 4407 orthopedic surgery residents were in allopathic (86%) and osteopathic (14%) training programs. There was significant improvement in OITE performance between subsequent postgraduate year (PGY) levels among allopathic residents (P<.001). Among osteopathic residents, OITE performance increased between PGY1 and PGY4 (P<.001) but plateaued between PGY4 and PGY5 (P>.05). At the PGY1 level, osteopathic residents had higher OITE performance than allopathic residents (P<.001), but scores were equivalent at the PGY2 to PGY4 levels (P>.05). At the PGY5 level, allopathic residents had higher OITE performance than osteopathic residents (P<.001). Allopathic medical students scored higher on the Step 1 (248±19 vs 242±17, P<.001) and Step 2 (255±16 vs 250±15, P<.001) board examinations. Medical knowledge increases during orthopedic surgery residency. Disparities exist by training pathway, with osteopathic residents outperforming allopathic residents at the PGY1 level but then underperforming at the PGY5 level. Ultimately, this study provides insights into how resident promotion and training pathway impacts the acquisition of medical knowledge during orthopedic surgery residency. [Orthopedics. 2023;46(6):379-383.].

Diversity in Leadership at Musculoskeletal Oncology Fellowships in the United States.

Musculoskeletal oncology fellowship directors (MOFDs) possess the unique ability to influence treatment paradigms in musculoskeletal oncology through teaching and research. Currently, the characteristics that define this important role including demographics, training characteristics, research activity, and grant funding are poorly defined. A list of musculoskeletal oncology fellowship programs was obtained from the American Association of Hip and Knee Surgeons and Musculoskeletal Oncology Fellowship Match. Bibliometric data including the h-index were abstracted from Scopus. Demographics, training, and federal grant characteristics were collected from academic websites. Comparisons were made using t-tests and data were presented as means ± SD. The average age at the appointment was 41±9 years and most were male (80%) and Caucasian (85%). Few had an additional graduate degree (10% MS, 5% PhD). The mean h-index was 23±15 resulting from 91±56 publications. There was a positive correlation between age and h-index (r=0.398, p=0.082). Four MOFDs (20%) had at least one National Institutes of Health research grant. Sex, race, additional graduate degree, and procurement of NIH funding were not associated with higher h-index values. Full professors had higher h-index values than assistant/associate professors (p=0.014). Women and racial minorities are underrepresented among leadership positions in musculoskeletal oncology fellowship programs. This study can help provide a benchmark for departments in orthopedic surgery and aspiring orthopedic surgeons for MOFD positions.

Prosthetic Hip Dislocations in Direct Anterior Versus Posterior Approach in Patients With Instrumented Lumbar Fusion.

BACKGROUND: Instrumented posterior lumbar spinal fusion (IPLSF) has been demonstrated to contribute to instability following total hip arthroplasty (THA). It is unclear whether a supine direct anterior (DA) approach reduces the risk of instability. METHODS: A retrospective review of 1,773 patients who underwent THA through either a DA approach or a posterior approach at our institution over a 7-year period was performed. Radiographic and chart reviews were then used to identify our primary group of interest comprised of 111 patients with previous IPLSF. Radiographic review, chart review, and phone survey was performed. Dislocation rates in each approach group were then compared within this cohort of patients with IPLSF. RESULTS: Within the group of patients with IPLSF, 33.3% (n = 37) received a DA approach while 66.6% (n = 74) received a posterior approach. None of the 9 total dislocations in the DA group had IPLSF, whereas 4 of the 16 total dislocations in the posterior approach group had IPLSF (P = .78). When examining the larger group of patients, including those without IPLSF, patients undergoing a DA approach had a lower BMI and were likely have a smaller head size implanted (P < .001 for both). Using Fischer's exact test, fusion was associated with dislocation in the posterior approach group (P < .01), whereas fusion was not associated with dislocation in the anterior approach group (P = 1.0). CONCLUSIONS: While there was no significant difference in dislocation rates between posterior and anterior approach groups, in patients with IPLSF, the anterior approach had a lower percentage of dislocation events compared to the posterior approach.

Impact of COVID-19 on the Reported Case Volume of Orthopaedic Sports Medicine Fellows in the United States.

Background: The impact of the coronavirus 2019 (COVID-19) pandemic on reported case volume during orthopaedic sports medicine fellowship training remains poorly understood from a national perspective. Hypothesis: It was hypothesized that reported case volume during orthopaedic sports medicine fellowship training would decrease during the 2019-2020 academic year, which corresponded to the COVID-19 outbreak. It was also hypothesized that there would be a subsequent rebound in case volume during the 2020-2021 academic year. Study Design: Cohort study. Methods: Reported mean case volumes were extracted for 4 academic years (2017-2018, 2018-2019, 2019-2020, and 2020-2021), and year-over-year percentage changes were calculated. Parametric tests were used for interyear comparisons. Results: There was a 7% decrease in mean ± SD case volume between the 2018-2019 and 2019-2020 academic years (339 ± 123 vs 316 ± 108; P = .042). Case categories with the greatest percentage declines were foot and ankle (-20%), knee instability (-11%), meniscus (-8%), and glenohumeral instability (-7%). There was a 13% year-over-year increase in case volume between the 2019-2020 and 2020-2021 academic years (316 ± 108 vs 357 ± 117; P < .001). Conclusion: There was a slight decrease in total orthopaedic sports medicine case volume during the 2019-2020 academic year, corresponding to widespread lockdowns during the COVID-19 outbreak. Certain case categories experienced the greatest negative impact. Results from this study may inform accrediting bodies and surgical educators on the impact of future disruptions to health care delivery.

Academic career outcomes of Orthopedic Research and Education Foundation resident grant recipients.

The Orthopedic Research and Education Foundation (OREF) awards resident research grants to orthopedic surgery residents. Outcomes are lacking for OREF resident grant recipients including academic career choice and scholarly productivity. This was a retrospective cohort study of OREF resident grant recipients (2012-2020). The percentage of OREF resident grant recipients selecting an academic career was compared with the percentage of academic orthopedic surgeons in the United States via a χ2 test. Two hundred and seventy-six OREF resident grants were issued to 272 orthopedic surgery residents at 73 programs. OREF resident grant recipients were predominantly male (79.0%) and Caucasian (70.2%). OREF resident grant recipients had greater women representation than the national cohort of orthopedic surgery residents (21.0% vs. 16.0%, p = 0.030) with similar proportions of underrepresented racial minorities (29.8% vs. 27.2%, p = 0.351). OREF resident grants consisted of clinical (69.6%) and basic/translational science (30.4%) research and were awarded mostly for sports medicine (25.4%), trauma (18.8%), and adult reconstruction (15.9%) topics. The average h-index was 8.5 ± 9.2 resulting from 29.5 ± 51.2 manuscripts. The majority of OREF resident grant recipients selected an academic career, which was higher than the national benchmark of academic orthopedic surgeons (63.8% vs. 24.4%, p < 0.001). Two OREF resident grant recipients transitioned to National Institutes of Health research funding (0.7%). Multivariable logistical regression demonstrated two independent characteristics associated with pursuit of a future academic career: female sex (p = 0.042) and higher h-index values (p = 0.002). Procurement of OREF resident grants is associated with pursuit of an academic career. Clinical significance: There is great interest in fostering the next generation of orthopedic surgeon scientists. Results from this study demonstrate the association between receipt of an OREF resident research grant and pursuit of a future career in academic orthopedic surgery.

Hot Topics and Current Controversies in Total Knee Arthroplasty.

Total knee arthroplasty continues to evolve. It is important to review some of the current controversies and hot topics in arthroplasty. Optimal knee alignment strategy is now just a matter of debate. Mechanical, kinematic, and functional alignment and the role of robotics in achieving optimum alignment are important topics, along with fixation and outpatient knee arthroplasty.

Variability in procedure volume of physical medicine and rehabilitation residents graduating from 2014 to 2021.

BACKGROUND: Adequate exposure to commonly performed procedures during physical medicine and rehabilitation (PM&R) residency is an important issue. OBJECTIVE: To assess temporal trends and variabilities in reported procedural volumes, including the number of residents achieving procedure minimum requirements as established by the Accredited Council for Graduate Medical Education (ACGME) PM&R Residency Review Committee. DESIGN: This was a retrospective cohort study of PM&R residents graduating from 2013-2014 to 2020-2021. Descriptive statistics were calculated for tracked procedures and compared over time with analysis of variance (ANOVA) tests. Variability was calculated as the procedure volume difference between the 90th and 10th percentile groups. SETTING: ACGME-accredited PM&R residency training programs. PARTICIPANTS: A total of 3231 PM&R residents graduating from 2014 to 2021. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Reported procedure volume and number of residents achieving minimum requirements. RESULTS: Total procedure volume increased over the study period (436 ± 225 to 523 ± 238, p = .013). The percentage of all procedures that were performed versus observed was stable over the study period (81%-77%, p = .234). Variability in total reported procedure volume remained stable over the study period. The percentage of PM&R residents not achieving minimum requirements ranged from 2% for peripheral joint injections to 22% for ultrasound in the contemporary training period. CONCLUSIONS: The volume of reported procedures has increased along with the number of PM&R residency programs and residents. Variabilities in total reported procedure volume were stable over time, but PM&R residents struggle to obtain minimum requirements for ultrasound procedures.

Impact of Orthopaedic Surgeons on National Institutes of Health Funding for Hip and Knee Arthroplasty Research.

BACKGROUND: The National Institutes of Health (NIH) remains one of the predominant sources of biomedical research funding in the United States, yet its impact on total hip and knee arthroplasty research is poorly understood. This study defines the portfolio of NIH funding for total joint arthroplasty (TJA) and the impact of orthopaedic surgeons on this portfolio. METHODS: The Research Portfolio Online Reporting Tools Expenditures and Results (RePORTER) database was queried for NIH grants that had been awarded for total hip and knee arthroplasty and total NIH funding from 2010 to 2020. Compound annual growth rates (CAGRs) were calculated. Funding totals were compared with those from 20 other clinical areas. The principal investigators (PIs) and grants were characterized, and comparisons were made with use of the Student t test. RESULTS: A total of 489 grants were awarded, totaling $181 million (CAGR of 10.3%). This was >3 times the growth rate for the total NIH budget (CAGR of 2.9%), which increased from $31.2 to $41.7 billion over the 11-year period. When compared with 20 other clinical areas, TJA received the least amount of NIH funding over that period. Alzheimer disease received the most funding ($12.1 billion, CAGR of 19.5%), and cerebral palsy received the penultimate amount of funding ($284 million, CAGR of 6.3%). The R01 grant mechanism was the predominant source (63.1%), and the Mayo Clinic (Rochester, Minnesota) received the most funding (9.7%). Departments of orthopaedic surgery were awarded the most funding (23.5%), yet only 20 orthopaedic surgeons were identified as PIs (16.0%). There were no significant differences in NIH funding totals by PI demographic and academic characteristics (p > 0.05), yet orthopaedic surgeons had among the highest Hirsch indices (h-indices) (p < 0.001). Funding supported clinical (63.5%), translational (19.3%), basic science (7.1%), and other types (10.1%) of research. The top areas with funding were postoperative complications (44.4%), postoperative pain management (17.6%), rehabilitation (15.1%), and implant design (12.4%). CONCLUSIONS: There is a paucity of orthopaedic surgeon representation among NIH grants awarded for TJA. Opportunities may exist for orthopaedic surgeons to collaborate in identified areas of clinical interest. Additional research is needed to understand the obstacles to obtaining NIH grant funding for orthopaedic surgeon PIs. CLINICAL RELEVANCE: Increasing the levels of funding from the NIH is a strategic priority for departments of orthopaedic surgery. Understanding levels of funding for clinical areas in total joint arthroplasty is critical to foster research and discovery support from the NIH.