Determining the validity of the Outpatient Arthroplasty Risk Assessment (OARA) tool for identifying patients for safe same-day discharge after primary shoulder arthroplasty

Trends in the Adoption of Outpatient Joint Arthroplasties and Patient Risk: A Retrospective Analysis of 2019 to 2021 Medicare Claims Data

INTRODUCTION

Total joint arthroplasties (TJAs) have recently been shifting toward outpatient arthroplasty. This study aims to explore recent trends in outpatient total joint arthroplasty (TJA) procedures and examine whether patients with a higher comorbidity burden are undergoing outpatient arthroplasty.

METHODS

Medicare fee-for-service claims were screened for patients who underwent total hip, knee, or shoulder arthroplasty procedures between January 2019 and December 2022. The procedure was considered to be outpatient if the patient was discharged on the same date of the procedure. The Hierarchical Condition Category Score (HCC) and the Charlson Comorbidity Index (CCI) scores were used to assess patient comorbidity burden. Patient adverse outcomes included all-cause hospital readmission, mortality, and postoperative complications. Logistic regression analyses were used to evaluate if higher HCC/CCI scores were associated with adverse patient outcomes.

RESULTS

A total of 69,520, 116,411, and 41,922 respective total knee, hip, and shoulder arthroplasties were identified, respectively. Despite earlier removal from the inpatient-only list, outpatient knee and hip surgical volume did not markedly increase until the pandemic started. By 2022Q4, 16%, 23%, and 36% of hip, knee, and shoulder arthroplasties were discharged on the same day of surgery, respectively. Both HCC and CCI risk scores in outpatients increased over time ( P < 0.001).

DISCUSSION

TJA procedures are shifting toward outpatient surgery over time, largely driven by the COVID-19 pandemic. TJA outpatients' HCC and CCI risk scores increased over this same period, and additional research to determine the effects of this should be pursued.

LEVEL OF EVIDENCE

Level III, therapeutic retrospective cohort study.

Predictors of Failure to Achieve Planned Same-Day Discharge after Primary Total Joint Arthroplasty: a Multivariable Analysis of Perioperative Risk Factors

INTRODUCTION

Failure to achieve planned same-day discharge (SDD) primary total joint arthroplasty (TJA) occurs in as many as 7% to 49% of patients in the United States. This study evaluated the association between 43 perioperative risk factors and SDD failure rates.

METHODS

A retrospective analysis of prospectively collected data from 466 primary TJAs with planned SDD to home was performed. Surgeries were performed at an academic tertiary care center comprising a hospital facility and a stand-alone ambulatory surgery center (ASC) on the same campus. Factors associated with failed SDD were identified using a multivariable analysis.

RESULTS

Only one of 316 (0.3%) patients who underwent surgery in the ASC failed planned SDD ( P < 0.001) compared with 33.3% of 150 patients who underwent surgery in the hospital. The ASC failure was because of pain that interfered with physical therapy. Sixty-two percent (n = 31) of hospital failures were attributed to medical complications, 24% (n = 12) to physical therapy clearance, 8% (n = 4) to not being seen by internal medicine or therapy on the day of surgery, and 6% (n = 3) to unknown causes. Failure was increased in patients with preoperative anemia ( P = 0.003), nonwhite patients ( P = 0.002), patients taking depression/anxiety medication ( P = 0.015), and for every 10-morphine milligram equivalent increase in opioids consumed per hour in the postacute care unit ( P = 0.030).

DISCUSSION

Risk stratification methods used to allocate patients to ASC versus hospital outpatient TJA surgery predicted SDD success. Most failures were secondary to medical causes. The findings of this study may be used to improve perioperative protocols enabling the safe planning and selection of patients for SDD pathways.

Costs of shoulder and elbow procedures are significantly reduced in ambulatory surgery centers compared to hospital outpatient departments

BACKGROUND

Recent literature has shown the advantages of outpatient surgery for many shoulder and elbow procedures, including cost savings with equivalent safety in appropriately selected patients. Two common settings for outpatient surgeries are ambulatory surgery centers (ASCs), which function as independent financial and administrative entities, or hospital outpatient departments (HOPDs), which are owned and operated by hospital systems. The purpose of this study was to compare shoulder and elbow surgery costs between ASCs and HOPDs.

METHODS

Publicly available data from 2022 provided by the Centers for Medicare & Medicaid Services (CMS) was accessed via the Medicare Procedure Price Lookup Tool. Current Procedural Terminology (CPT) codes were used to identify shoulder and elbow procedures approved for the outpatient setting by CMS. Procedures were grouped into arthroscopy, fracture, or miscellaneous. Total costs, facility fees, Medicare payments, patient payment (costs not covered by Medicare), and surgeon's fees were extracted. Descriptive statistics were used to calculate means and standard deviations. Cost differences were analyzed using Mann-Whitney U tests.

RESULTS

Fifty-seven CPT codes were identified. Arthroscopy procedures (n = 16) at ASCs had significantly lower total costs ($2667 ± $989 vs. $4899 ± $1917; P = .009), facility fees ($1974 ± $819 vs. $4206 ± $1753; P = .008), Medicare payments ($2133 ± $791 vs. $3919 ± $1534; P = .009), and patient payments ($533 ± $198 vs. $979 ± $383; P = .009) compared with HOPDs. Fracture procedures (n = 10) at ASCs had lower total costs ($7680 ± $3123 vs. $11,335 ± $3830; P = .049), facility fees ($6851 ± $3033 vs. $10,507 ± $3733; P = .047), and Medicare payments ($6143 ± $2499 vs. $9724 ± $3676; P = .049) compared with HOPDs, although patient payments were not significantly different ($1535 ± $625 vs. $1610 ± $160; P = .449). Miscellaneous procedures (n = 31) at ASCs had lower total costs ($4202 ± $2234 vs. $6985 ± $2917; P < .001), facility fees ($3348 ± $2059 vs. $6132 ± $2736; P < .001), Medicare payments ($3361 ± $1787 vs. $5675 ± $2635; P < .001), and patient payments ($840 ± $447 vs. $1309 ± $350; P < .001) compared with HOPDs. The combined cohort (n = 57) at ASCs had lower total costs ($4381 ± $2703 vs. $7163 ± $3534; P < .001), facility fees ($3577 ± $2570 vs. $6539.1 ± $3391; P < .001), Medicare payments ($3504 ± $2162 vs. $5892 ± $3206; P < .001), and patient payments ($875 ± $540 vs. $1269 ± $393; P < .001) compared with HOPDs.

CONCLUSION

Shoulder and elbow procedures performed at HOPDs for Medicare recipients were found to have average total cost increase of 164% compared with those performed at ASCs (184% savings for arthroscopy, 148% for fracture, and 166% for miscellaneous). ASC use conferred lower facility fees, patient payments, and Medicare payments. Policy efforts to incentivize migration of surgeries to ASCs may translate into substantial health care cost savings.

Prospective cohort study of same-day discharge shoulder arthroplasty in patients of 85 years and younger

Introduction

Shoulder arthroplasty is mostly performed as an inpatient procedure. Same-day discharge arthroplasty has shown positive results in hip and knee surgery. Primary objective of this study was to investigate whether a safe and satisfactory same-day discharge (SDD) can be predicted with a set of easy to use predefined criteria, without increasing complications and re-admissions.

Methods

This study was a prospective cohort study. Patient selection criteria were: <85 years old, ASA 1, 2, and mild ASA 3. Primary outcome variables were successful SDD, complications, re-admissions and patient satisfaction. Secondary outcomes were patient-reported outcome scores. The results are compared with the inpatient cohort.

Results

In total, 163 patients were treated for elective shoulder arthroplasty. Of which 51 patients were selected for same-day discharge arthroplasty. 94% of pre-planned same-day discharge arthroplasty patients were discharged on the day of surgery. In the same-day discharge group, there were no complications related to the early discharge and a 2% readmission rate as opposed to a 3% readmission rate in the inpatient group. Surgery related as well as medical complications did not differ between the same-day discharge and inpatient cohort.

Discussion

Same-day discharge shoulder arthroplasty is a safe and satisfying treatment option in selected patient groups.

Open coraco-clavicular ligament reconstruction (CCLR) in treatment of displaced distal clavicle fractures has low complication rate and excellent union rate: a systematic review

BACKGROUND

It is well established that non-operative treatment of displaced distal clavicle fractures (DDCF) leads to a high non-union rate. A number of open surgical treatments in the past have shown good to excellent outcomes including shoulder function and union rate. Despite this there is no consensus on the outcome of open coraco-clavicular ligament reconstruction (CCLR). The aim of this systematic review was to assess the union rate, complications and shoulder function of open CCLR techniques in the treatment of DDCF.

PATIENTS AND METHODS

A review of the online databases MEDLINE and Embase was conducted on 1 January 2021 according to PRISMA guidelines. The review was registered prospectively in the PROSPERO database. Clinical studies reporting union rate, complications and shoulder function were included. The studies were appraised using the Methodological Index for Non-Randomized Studies (MINORS) tool.

RESULTS

The search strategy identified 18 studies eligible for inclusion with a total of 330 patients. These included 12 retrospective case series and 5 nonrandomized retrospective comparative studies and one RCT. All but one study reported on shoulder function, while all the studies reported on union rate and complications. The overall shoulder function was good to excellent using Constant-Murley score. The overall union rate was 97.6% and complication rate was 7.6%.

CONCLUSION

Open CCLR for displaced distal clavicle fractures that have a disruption of CC ligament, is a reliable treatment with excellent union rate and good to excellent shoulder functional scores.

LEVEL OF EVIDENCE

IV; Systematic review.

Similar Value Demonstrated in the Short-Term Outcomes of Superior Capsular Reconstruction and Reverse Shoulder Arthroplasty for Massive Rotator Cuff Tears

Purpose

The purposes of this study were to investigate the difference in value (benefit to cost ratio) of dermal allograft superior capsular reconstruction (SCR) versus reverse total shoulder arthroplasty (rTSA) for the treatment of massive rotator cuff tears (MRCTs) without arthritis; to compare the patient populations selected for the operations and report pre- and postoperative functional data; and to understand other characteristics of the 2 operations, including operating time, use of institutional resources, and complications.

Methods

A retrospective, single-institution analysis during the study period 2014-2019 with MRCT treated with SCR or rTSA by 2 surgeons with complete institutional cost data and minimum 1-year clinical follow-up with American Shoulder and Elbow Surgeons (ASES) score. Value was defined as ΔASES/(total direct costs/$10,000).

Results

Thirty patients underwent rTSA and 126 patients SCR during the study period with significant differences noted in patient demographics and tear characteristics between the groups (patients who underwent rTSA were older, less male, had more pseudoparalysis, had greater Hamada and Goutallier scores, and had more proximal humeral migration). Value was 25 and 29 (ΔASES/$10,000) for rTSA and SCR, respectively (P = .7). The total costs of rTSA and SCR were $16,337 and $12,763, respectively (P = .7). Both groups experienced substantial improvements in ASES scores: 42 for rTSA vs 37 for SCR (P = .6). The operative time for SCR was much longer (204 vs 108 minutes, P < .001) but complication rate lower (3% vs 13%, P = .02) versus rTSA.

Conclusions

In a single institutional analysis of the treatment of MRCT without arthritis, rTSA and SCR demonstrated similar value; however, the value calculation is highly dependent on institution specific variables and duration of follow-up. The operating surgeons demonstrated different indications in selecting patients for each operation. rTSA had an advantage over SCR in shorter operative time, whereas SCR demonstrated a lower complication rate. Both SCR and rTSA are demonstrated to be effective treatments for MRCT at short-term follow-up.

Level of Evidence

III, retrospective comparative study.

Perioperative risk stratification tools for shoulder arthroplasty: a systematic review

BACKGROUND

Risk stratification tools are being increasingly utilized to guide patient selection for outpatient shoulder arthroplasty. The purpose of this study was to identify the existing calculators used to predict discharge disposition, postoperative complications, hospital readmissions, and patient candidacy for outpatient shoulder arthroplasty and to compare the specific components used to generate their prediction models.

METHODS

This review was conducted in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analysis protocol. PubMed, Cochrane Library, Scopus, and OVID Medline were searched for studies that developed calculators used to determine patient candidacy for outpatient surgery or predict discharge disposition, the risk of postoperative complications, and hospital readmissions after anatomic or reverse total shoulder arthroplasty (TSA). Reviews, case reports, letters to the editor, and studies including hemiarthroplasty cases were excluded. Data extracted included authors, year of publication, study design, patient population, sample size, input variables, comorbidities, method of validation, and intended purpose. The pros and cons of each calculator as reported by the respective authors were evaluated.

RESULTS

Eleven publications met inclusion criteria. Three tools assessed patient candidacy for outpatient TSA, 3 tools evaluated the risk of 30- or 90-day hospital readmission and postoperative complications, and 5 tools predicted discharge destination. Four calculators validated previously constructed comorbidity indices used as risk predictors after shoulder arthroplasty, including the Charlson Comorbidity Index, Elixhauser Comorbidity Index, modified Frailty Index, and the Outpatient Arthroplasty Risk Assessment, while 7 developed newcalculators. Nine studies utilized multiple logistic regression to develop their calculators, while 1 study developed their algorithm based on previous literature and 1 used univariate analysis. Five tools were built using data from a single institution, 2 using data pooled from 2 institutions, and 4 from large national databases. All studies used preoperative data points in their algorithms with one tool additionally using intraoperative data points. The number of inputs ranged from 5 to 57 items. Four calculators assessed psychological comorbidities, 3 included inputs for substance use, and 1 calculator accounted for race.

CONCLUSION

The variation in perioperative risk calculators after TSA highlights the need for standardization and external validation of the existing tools. As the use of outpatient shoulder arthroplasty increases, these calculators may become outdated or require revision. Incorporation of socioeconomic and psychological measures into these calculators should be investigated.

Perioperative pain control represents the primary concern for patients considering outpatient shoulder arthroplasty: a survey-based study

BACKGROUND

Outpatient (OP) total shoulder arthroplasty (TSA) with same-day discharge can now be performed safely in appropriately selected patients. Patient knowledge and perspectives regarding OP TSA are yet unknown and such information may inform surgeon decision-making and provide a framework for addressing patient concerns. The goal of this study was to understand and quantify patient knowledge of and concerns for OP TSA, with a working hypothesis that majority of patients are unaware of OP TSA as a realistic option and that their primary concern would be postoperative pain control.

METHODS

This was a retrospective cohort study at a tertiary care academic medical center including patients who underwent anatomic or reverse shoulder arthroplasty and completed an OP TSA expectations questionnaire/survey. This survey was provided preoperatively and included demographic factors, self-rated health evaluation, and perioperative expectations. Surveys evaluated whether patients undergoing TSA had any prior awareness of OP TSA and evaluated their primary concern with same-day discharge. Secondary questions included an assessment of patient expectations of outcomes of outpatient vs. inpatient surgery as well as their expected length of inpatient stay.

RESULTS

A total of 122 patients who underwent anatomic and reverse shoulder arthroplasty completed the questionnaire and comprised the study cohort. Fifty-two (42.6%) of the patients were unaware that OP TSA was an option, and 26 (50%) of these were comfortable with the idea of OP TSA. Comfort with OP TSA was significantly associated with higher subjective patient-reported health status. Fifty-eight patients (47.5%) expected that following TSA they would require <24 hours of in-hospital postoperative care. The primary concern for patients considering OP TSA was postoperative pain control, endorsed by 44.3% of patients, compared with 13.1% of patients stating this would be their primary concern if admitted as an inpatient postoperatively. Pain control being a primary concern was significantly different between those considering outpatient vs. inpatient TSA. Most patients anticipated that OP shoulder arthroplasty would lead to a better (36%) or comparable (53%) outcome, whereas only 11% had concerns that it would lead to a worse outcome.

CONCLUSION

Expanding OP TSA crucially depends on awareness and education. Perceived ability to control pain is an important concern. Patients may benefit from preoperative counseling, including emphasizing a comprehensive postoperative pain management strategy.

Ambulatory anesthesia and discharge: an update around guidelines and trends

PURPOSE OF REVIEW

Provide an oversight of recent changes in same-day discharge (SDD) of patient following surgery/anesthesia.

RECENT FINDINGS

Enhanced recovery after surgery pathways in combination with less invasive surgical techniques have dramatically changed perioperative care. Preparing and optimizing patients preoperatively, minimizing surgical trauma, using fast-acting anesthetics as well as multimodal opioid-sparing analgesia regime and liberal prophylaxis against postoperative nausea and vomiting are basic cornerstones. The scope being to maintain physiology and minimize the impact on homeostasis and subsequently hasten and improve recovery.

SUMMARY

The increasing adoption of enhanced protocols, including the entire perioperative care bundle, in combination with increased use of minimally invasive surgical techniques have shortened hospital stay. More intermediate procedures are today transferred to ambulatory pathways; SDD or overnight stay only. The traditional scores for assessing discharge eligibility are however still valid. Stable vital signs, awake and oriented, able to ambulate with acceptable pain, and postoperative nausea and vomiting are always needed. Drinking and voiding must be acknowledged but mandatory. Escort and someone at home the first night following surgery are strongly recommended. Explicit information around postoperative care and how to contact healthcare in case of need, as well as a follow-up call day after surgery, are likewise of importance. Mobile apps and remote monitoring are techniques increasingly used to improve postoperative follow-up.

Same-Day Discharge Following Aseptic Revision and Conversion Total Joint Arthroplasty: A Single-Institution Experience

Background

With hospital inpatient capacity increasingly limited and primary total joint arthroplasty (TJA) rapidly transitioning to outpatient settings, the feasibility of outpatient aseptic revision and conversion TJA (rTJA) has been considered. Before the widespread adoption of outpatient rTJA, guidelines must be established to prevent patient harm. To this end, this study describes our initial experience with same-day-discharge (SDD) aseptic rTJA.

Methods

All aseptic rTJAs performed between May 8, 2015, and December 30, 2021, were retrospectively reviewed. Revision indications, patient selection criteria, and outcomes including SDD success rate, predischarge complications, all-cause emergency department visits, inpatient readmissions, and unplanned clinic encounters within 90 days of surgery were recorded.

Results

Thirty-five SDD aseptic rTJAs were performed. Conversion total hip arthroplasty (55.0%) and instability (27.3%) were the most common indications for hip revision. Instability (50%) and conversion total knee arthroplasty (20.8%) were most common for knee revision. SDD was achieved in 97% (34/35) of cases. One hip patient failed SDD due to persistent hypoxia requiring an overnight hospital stay and also underwent closed reduction for dislocation in the emergency department within 90 days of discharge. Two additional patients had unplanned clinic encounters within 90 days of the index procedure. There were no hospital readmissions or reoperations within 90 days.

Conclusions

Our initial experience suggests SDD aseptic rTJA can be safe and effective when modern perioperative outpatient protocols and surgical techniques are implemented. Future studies should further define patient selection criteria to optimize outcomes and minimize complications in this population.

Same Day Joint Replacement Surgery: Patient Selection and Perioperative Management

Joint replacements are increasingly performed as outpatient surgeries. The push toward ambulatory joint arthroplasty is driven in part by the changing current health care economics and reimbursement models. Patients' selection and well-designed perioperative care pathways are critical for the success of these procedures. The rate of complications after outpatient joint arthroplasty is comparable to the rate of complications in the ambulatory setting. Patient education, adequate social support, multimodal analgesia, regional anesthesia are key ingredients to the ambulatory care pathway after joint arthroplasty. Motor sparing nerve blocks are often used in these settings. Implementation of the elements of fast protocols can result in overall improvement of outcome metrics for all patients undergoing joint arthroplasty, including reduced length of stay and increased rate of home discharge.

The transition to outpatient shoulder arthroplasty: a systematic review

BACKGROUND AND HYPOTHESIS

Transitioning shoulder arthroplasty (SA) from an inpatient to outpatient procedure is associated with increased patient satisfaction and potentially decreased costs; however, concerns exist about complications following same-day discharge. We hypothesized that outpatient SA would be associated with low rates of failed discharges, readmissions, and complications, rendering it a safe and effective option for SA.

METHODS

A systematic review of the outpatient SA literature identified 16 of 447 studies with level III and IV evidence that met the inclusion criteria with at least 90 days of follow-up. Data on patient demographic characteristics, preoperative and postoperative protocols, surgery characteristics, failed discharges, complications, and readmissions were collected and pooled for analysis.

RESULTS

A total of 990 patients were included in our analysis. Many studies identified specific institutional protocols for determining eligibility for outpatient SA, including preoperative clearance from an anesthesiologist; identification of a perioperative caretaker; and exclusion of patients based on cardiac, pulmonary, or hematologic risk factors. Failed same-day discharge occurred in only 0.9% of patients (7 of 788), and 2.1% of patients (9 of 418) and 0.79% of patients (2 of 252) presented to an emergency department or urgent care facility for a perioperative concern. The readmission rate for periprosthetic fracture, arthrofibrosis, infection, subscapularis rupture, and anterior subluxation was 1.3% (7 of 529 patients). Complications occurred in 7.0% of patients (70 of 990), with 5.4% of patients (53 of 990) experiencing a surgical complication and 1.7% (17 of 990) having a medical complication. There were 28 total reoperations (2.9%, 28 of 955 patients).

DISCUSSION AND CONCLUSION

Outpatient SA is associated with low rates of failed discharges, readmissions, and complications. Additionally, the medical and surgical complications that occur after outpatient SA are unlikely to be prevented by the short inpatient stay characteristic of traditional SA. With careful screening measures to identify appropriate candidates for same-day discharge, outpatient SA represents a safe approach to prevent unnecessary hospitalizations and to decrease costs associated with SA.

What is the optimal surgical treatment for Neer type IIB (IIC) distal clavicle fractures? A systematic review and meta-analysis

Background

The purpose of the present study was to systematically review the current treatment strategies for the treatment of Neer type IIB distal clavicle fractures in terms of functional outcome and complication rates and to examine the most appropriate surgical method by comparing all the available surgical techniques and implants.

Methods

We performed a systematic review of the existing literature (2000–2021) in accordance with the PRISMA statement. We searched PubMed, Scopus, Web of Science, Research Gate and Google Scholar using the general terms ‘distal AND clavicle AND fracture’ to capture as many reports as possible. The MINORS tool was used to assess the risk of bias of the nonrandomized studies. We categorized the reported surgical techniques into four main types: open or arthroscopic coracoclavicular (CC) stabilization, locking plate fixation with or without CC augmentation, hook plate fixation and acromioclavicular joint (ACJ) transfixation. We reported findings for two main outcomes: clinical results and complication rates categorized into major and minor.

Results

Our database search yielded a total of 630 records; 34 studies were appropriate for qualitative analysis. There were 790 patients, with a mean age of 40.1 years, a female percentage of 37% and a mean follow-up period of 29.3 months. In total, 132 patients received a hook plate, 252 received a locking plate, 368 received CC stabilization and 41 received transacromial transfixation. All studies were retrospective and had fair MINORS scores. Locking plate, CC stabilization and ACJ transfixation showed similar clinical results but were much better than hook plate fixation; CC augmentation did not significantly improve the outcome of locking plate fixation. The rate of major complications was similar among groups; hook plate and AC joint transfixation had the worst rates of minor complications. Open CC techniques were slightly better than arthroscopic techniques.

Conclusions

The present systematic review for the optimal fixation method for Neer type IIB fractures of the distal clavicle showed similar major complication rates among techniques; the hook plate technique demonstrated inferior clinical results to other techniques. Open CC stabilization and locking plate fixation without CC augmentation seem to be the best available treatment options.

Relative Contribution of Outpatient Arthroplasty Risk Assessment Score Medical Comorbidities to Same-Day Discharge After Primary Total Joint Arthroplasty

BACKGROUND

Selection of patients who can safely undergo outpatient total joint arthroplasty (TJA) is an increasing priority given the growth of ambulatory TJA. This study quantified the relative contribution and weight of 52 medical comorbidities comprising the Outpatient Arthroplasty Risk Assessment (OARA) score as predictors of safe same-day discharge (SDD).

METHODS

The medical records of 2748 primary TJAs consecutively performed between 2014 and 2020 were reviewed to record the presence or absence of medical comorbidities in the OARA score. After controlling for patients not offered SDD due to OARA scores and patients who were offered but declined SDD, the final analysis sample consisted of 631 cases, 92.1% of whom achieved SDD and 7.9% of whom did not achieve SDD. Odds ratios were calculated to quantify the extent to which each comorbidity is associated with achieving SDD.

RESULTS

Demographic characteristics of analysis cases were consistent with a high-volume TJA practice in a US metropolitan area. Among testable OARA comorbidities, 53% significantly decreased the likelihood of SDD by 2.3 (body mass index [BMI] ≥40 kg/m²) to 12 (history of post-operative confusion and pacemaker dependence) times. BMI between 30 and 39 kg/m² did not affect the likelihood of SDD (P = .960), and BMI ≥40 kg/m² had the smallest odds ratio in our study (2.28, 95% confidence interval 1.11-4.67, P = .025).

CONCLUSION

Study findings contribute to the refinement of the OARA score as a successful predictor of safe SDD following primary TJA while maintaining low 90-day readmission rates.