Lower Extremity Joint Replacement Research Articles

A comparison of three methods in categorizing functional status to predict hospital readmission across post-acute care

BackgroundMethods used to categorize functional status to predict health outcomes across post-acute care settings vary significantly.ObjectivesWe compared three methods that categorize functional status to predict 30-day and 90-day hospital readmission across inpatient rehabilitation facilities (IRF), skilled nursing facilities (SNF) and home health agencies (HHA).Research designRetrospective analysis of 2013–2014 Medicare claims data (N = 740,530). Data were randomly split into two subsets using a 1:1 ratio. We used half of the cohort (development subset) to develop functional status categories for three methods, and then used the rest (testing subset) to compare outcome prediction. Three methods to generate functional categories were labeled as: Method I, percentile based on proportional distribution; Method II, percentile based on change score distribution; and Method III, functional staging categories based on Rasch person strata. We used six differentiation and classification statistics to determine the optimal method of generating functional categories.SettingIRF, SNF and HHA.SubjectsWe included 130,670 (17.7%) Medicare beneficiaries with stroke, 498,576 (67.3%) with lower extremity joint replacement and 111,284 (15.0%) with hip and femur fracture.MeasuresUnplanned 30-day and 90-day hospital readmission.ResultsFor all impairment conditions, Method III best predicted 30-day and 90-day hospital readmission. However, we observed overlapping confidence intervals among some comparisons of three methods. The bootstrapping of 30-day and 90-day hospital readmission predictive models showed the area under curve for Method III was statistically significantly higher than both Method I and Method II (all paired-comparisons, p<.001), using the testing sample.ConclusionsOverall, functional staging was the optimal method to generate functional status categories to predict 30-day and 90-day hospital readmission. To facilitate clinical and scientific use, we suggest the most appropriate method to categorize functional status should be based on the strengths and weaknesses of each method.

Patient Costs, Bundled Payment, And More

Patient Costs, Bundled Payment, And More

The Impact Of Bundled Payment On Health Care Spending, Utilization, And Quality: A Systematic Review.

The Centers for Medicare and Medicaid Services (CMS) has promoted bundled payment programs nationwide as one of its flagship value-based payment reforms. Under bundled payment, providers assume accountability for the quality and costs of care delivered during an episode of care. We performed a systematic review of the impact of three CMS bundled payment programs on spending, utilization, and quality outcomes. The three programs were the Acute Care Episode Demonstration, the voluntary Bundled Payments for Care Improvement initiative, and the mandatory Comprehensive Care for Joint Replacement model. Twenty studies that we identified through search and screening processes showed that bundled payment maintains or improves quality while lowering costs for lower extremity joint replacement, but not for other conditions or procedures. Our review also suggests that policy makers should account for patient-level heterogeneity and include risk stratification for specific conditions in emerging bundled payment programs.

COMPREHENSIVE CARE FOR JOINT REPLACEMENT MODEL: POST-ACUTE CARE AND PREFERRED PROVIDER NETWORKS

The Comprehensive Care for Joint Replacement (CJR) model, implemented by the Centers for Medicare & Medicaid Services in 2016, is a randomized, controlled trial that tests the effect of holding a hospital accountable for payments and quality of all services provided to lower extremity joint replacement (LEJR) patients during an episode of care. The newly released results include 147,923 LEJR episodes that were initiated by 733 hospitals in 67 randomly selected metropolitan statistical areas. The objective of this presentation is to explore changes to the care pathway using results from a mixed-methods analytic approach including triangulation of findings from analysis of Medicare claims, hospital survey and hospital and associated provider interview data. Hospitals reported implementing notable changes over the past two years including hiring navigators, changes to therapy protocols, and direct discharge home. Hospital interviewees described efforts to strengthen relationships with PAC providers including the investment of resources into the development of preferred PAC provider networks. As a result of these changes, the average number of SNF days decreased by 2.3 days more for CJR episodes than for control group episodes from the baseline to the intervention period (p<0.01). Changes in two of nine complexity measures indicated a statistically significant relative decrease in CJR patients’ functional status at SNF admission. The relative increases in CJR patients’ average early-loss activities of daily living (ADLs) scores (p<0.05) and motion scores (p<0.10) suggest an increase in patients with greater needs were discharged to a SNF relative to the control group.

Association of Bundled Payments for Joint Replacement Surgery and Patient Outcomes With Simultaneous Hospital Participation in Accountable Care Organizations

An increasing number of hospitals have participated in Medicare's bundled payment and accountable care organization (ACO) programs. Although participation in bundled payments has been associated with savings for lower-extremity joint replacement (LEJR) surgery, simultaneous participation in ACOs may be associated with different outcomes given the prevalence of LEJR among patients receiving care at ACO participant organizations and potential overlap in care redesign strategies adopted under the 2 payment models. To examine whether simultaneous participation in a Medicare Shared Savings Program (MSSP) ACO affects the association between hospitals' participation in LEJR episodes under the Bundled Payments for Care Improvement (BPCI) initiative and patient outcomes compared with participation in the BPCI initiative alone. This cohort study, conducted from January 1 to May 31, 2019, used 2011 to 2016 Medicare claims data and incorporated an instrumental variable with a difference-in-differences method among 483 008 fee-for-service Medicare beneficiaries undergoing LEJR surgery at 212 bundled payment participant hospitals, 105 coparticipant hospitals, and 1413 nonparticipant hospitals in the United States. Hospital participation in both the BPCI initiative and the MSSP (coparticipants), BPCI only (bundled payment participants), or neither (nonparticipants). Changes in clinical outcomes and mean LEJR episode spending. A total of 483 008 patients (mean [SD] age, 73.0 [8.4] years; 308 173 [63.8%] female) were included in the study. No differential changes were found in patient and hospital characteristics across participation groups. In adjusted analysis, coparticipants had 1.5% (95% CI, 0.7%-2.2%; P < .001) more unplanned readmissions than did bundled payment participants. Compared with bundled payment participants, coparticipants also had differentially greater decreases in hospital length of stay (adjusted difference-in-differences value, -5.3%; 95% CI, -7.1% to -3.5%; P < .001) and home health care use (adjusted difference-in-differences value, -3.4%; 95% CI, -4.5% to -2.3%; P < .001) and greater increases in postdischarge outpatient follow-up (adjusted difference-in-differences value, 2.1%; 95% CI, 0.9%-3.3%; P < .001). Coparticipants and bundled payment participants did not have differential changes in episode spending (adjusted difference-in-differences value, 0.4%; 95% CI, -0.7% to 1.6%; P = .46), although both groups had more decreased spending compared with nonparticipants. Among bundled payment participants, coparticipation in ACOs was not associated with LEJR episode savings but was associated with differential changes in postacute care use patterns and unplanned readmissions. These findings support the longer-term benefits of LEJR bundles and suggest that coparticipants may adopt care redesign strategies that differ from hospitals with bundled payments only.

Shared Medical Appointments in Preoperative Joint Replacement: Assessing Patient and Healthcare Member Satisfaction.

Shared medical appointments (SMAs) have proven to be effective in improving patient access and education while augmenting productivity. In shifting from a traditional visit model, patient and interdisciplinary healthcare team (IHCT) member satisfaction is imperative. Predominantly seen in primary care, SMA use in orthopedics is limited. After identification of access and productivity concerns, the SMA was implemented as a quality improvement project in a rural clinic. The lower extremity joint replacement (LEJR) population was chosen because of multiple preoperative appointments and costs on the healthcare system. To assess patients' and IHCT members' satisfaction levels in using an SMA for the preparation of LEJR. The SMA is an effective model offering an efficient, cost-effective methodology aligning with the Institute for Healthcare Improvement's Triple Aim. Twenty SMAs were conducted. Sixty-three patients and 14 ICHT members participated. Mean (M) satisfaction rating for SMA patients (M = 4.90, SD 0.26) was significantly higher than mean for traditional patients (M = 4.03, SD 0.39). Interdisciplinary healthcare team members' attitudes toward SMAs revealed a mean score of 4.58. Incidentally, cycle times improved as did lengths of stay. Lower extremity joint replacement patients and IHCT members reported high satisfaction with SMAs.

Cocalibrated Functional Score and Subsequent Post-Acute-Care (PAC) Utilization

Abstract Date Presented 04/06/19 This study is the first examining the relationship between cocalibrated functional score and subsequent PAC utilization for Medicare beneficiaries. Examining functional scores across PAC settings for patients with stroke, lower extremity joint replacement, and hip/femur fracture allows OTs to estimate clients' needs for postacute services. Primary Author and Speaker: Chih-Ying Li Additional Authors and Speakers: Amol Karmarkar, Yong-Fang Kuo, Allen Hass, Kenneth Ottenbacher

Pulmonary hypertension could be a risk for deep vein thrombosis in lower extremities after joint replacement surgery.

A background of Pulmonary Hypertension (PH) indicates a progressive elevation of pulmonary vascular resistance, leading to overfilling, elevation of venous pressure, congestion in various organs, and edema in the venous system. This study aimed to investigate whether PH is a risk factor for deep vein thrombosis (DVT) of the lower extremities after hip and knee replacement surgery. A total of 238 patients who received joint replacement of lower extremities in our department of orthopedics from January 2009 to January 2012 were examined by echocardiography and Color Doppler flow imaging (CDFI) of the lower extremities. Based on pulmonary artery pressure (PAP), the patients were divided into a normal PAP group (n=214) and PH group (n=24). All the patients were re-examined by CDFI during post-operative care. Among the 238 patients, 18 had DVT in the lower extremities after the operation. DVT total incidence rate was 7.56% (18/238). In the PH group, 11 patients had DVT (45.83%, 11/24), but in the normal PAP group, only 7 had DVT (3.27%, 7/214). The incidence of DVT was significantly lower in the normal PAP group than in the PH group (P<0.01). In addition, there was a positive correlation between PAP and the incidence of DVT. PH could be a high-risk factor for the occurrence of DVT in patient's lower extremities after joint replacement surgeries.

Evaluation of Economic and Clinical Outcomes Under Centers for Medicare & Medicaid Services Mandatory Bundled Payments for Joint Replacements

In 2016, the Centers for Medicare & Medicaid Services (CMS) launched its first mandatory bundled payment program, the Comprehensive Care for Joint Replacement (CJR) model, by randomizing metropolitan statistical areas (MSAs) into the payment model. To evaluate changes in key economic and clinical outcomes associated with the CJR model. A retrospective, national, population-based analysis of Medicare fee-for-service beneficiaries undergoing lower extremity joint replacement was conducted using 100% Medicare Part A data and 5% Medicare Part B data. Within an intention-to-treat framework, a difference-in-differences approach was used to compare Medicare spending, quality of care, volume of episodes, and patient selection in episodes of lower extremity joint replacements in the first 2 years of the program between propensity score-matched CJR and non-CJR hospitals (episodes initiated from April 1, 2016, through December 31, 2017, with the latter completed by March 31, 2018). Lower extremity joint replacement episodes in MSAs randomly assigned to the CJR model were compared with those in MSAs not assigned to the CJR model. Random assignment of MSAs into the CJR model within prespecified strata. Spending and its components, quality of care, volume of episodes, and patient characteristics were the main outcomes. After propensity score matching, there were 157 828 primary lower extremity joint replacement cases across 684 hospitals in the CJR (treatment) group (101 641 [64.4%] women; mean [SD] age, 72.8 [8.9] years) and 180 594 cases across 726 hospitals in the non-CJR (control) group (115 580 women [64.0%] women; mean [SD] age, 72.6 [8.8] years). The CJR was associated with a decrease of $582 per episode in Medicare Part A spending, a 2.5% savings on claims (95% CI, -$873 to -$290; P < .001) driven by a 5.5% decline in 90-day postacute care spending, concentrated in skilled nursing facilities (-4.5% change from baseline; 95% CI, -$460 to -$26; P = .03) and inpatient rehabilitation facilities (-22.9% change from baseline; 95% CI,-$497 to -$176; P < .001). Estimated savings on claims, while consistent with changes in practice patterns, may not have exceeded the reconciliation payments to hospitals reported by CMS to date. No significant changes in hospital length of stay, readmissions, complications, 30- or 90-day mortality, volume of episodes, or patient characteristics relative to control were found. The CJR was associated with reduced Medicare Part A spending on claims over 2 years, largely through lower postacute spending. Mandatory bundled payments may serve as a useful model for policy efforts to change clinicians' and facilities' behavior without harming quality.

Bundled Payments for Care Improvement: Health System Experience With Lower Extremity Joint Replacement at Higher and Lower Volume Hospitals

BackgroundThe Bundled Payments for Care Improvement (BPCI) initiative was introduced in 2013 to reduce Medicare healthcare costs while preserving or enhancing quality. We examined data from a metropolitan healthcare system comprised of 1 higher volume hospital and 4 lower volume hospitals that voluntarily elected to participate in the BPCI Major Joint Replacement of the Lower Extremity Model 2, beginning July 1, 2015. Stratifying the data by hospital volume, we determined how costs changed during the 16-month period when all 5 hospitals participated compared to the 1-year period preceding BPCI participation, where savings were achieved, and how the hospitals were rewarded. MethodsThe Medicare data included the 90-day target for each episode and actual part A and part B spending for the anchor hospitalization plus all post-acute payments including inpatient rehabilitation, skilled nursing, home health, outpatient physical therapy, and hospital readmissions. ResultsThe mean episode of care cost decreased by 11.1% (from $21,324 to $18,953) at the higher volume hospitals and by 8.3% (from $25,724 to $23,584) at the lower volume hospitals during BPCI participation compared to the preceding year. The savings were achieved by reducing the use of inpatient rehabilitation, shortening the length of stay at skilled nursing facilities, and decreasing readmission rates. Although the higher volume hospital achieved an increased mean savings of $230 per episode compared to the lower volume hospitals ($2371 vs $2141), it was penalized $490 per episode after reconciling the actual Medicare expenditures with the BPCI targets while the lower volume hospitals received a mean reward of $315 per episode. ConclusionThe BPCI initiative decreased costs and readmissions within our healthcare system. Despite substantial savings compared to the preceding year, the higher volume hospital’s low target derived from its 2009-2012 baseline costs was not achieved which resulted in a penalty and led it to withdraw from the BPCI initiative in October 2016.

Relationship Between Baseline Patient-reported Outcomes and Demographic, Psychosocial, and Clinical Characteristics: A Retrospective Study.

Introduction:Alternative payment models in total lower extremity joint replacement (TJR) increasingly emphasize patient-reported outcomes (PROs) to link the latter to value-based payments. It is unclear to what extent demographic, psychosocial, and clinical characteristics are related to PROs measured preoperatively with the commonly used Hip/Knee Osteoarthritis Outcome Scores (HOOS/KOOS) and the Veterans RAND 12-Item Health Survey (VR-12) questionnaires. We aim to identify (1) the preoperative relationship between HOOS/KOOS and VR-12 scores and several demographic, psychosocial, and clinical patient characteristics and (2) the best modifiable factors for optimization, which may result in improved baseline PROs before TJR.Methods:All TJR cases performed in 2017 at the two highest-volume hospitals within an urban academic health system were queried. Preoperative HOOS/KOOS and VR-12 surveys were administered through an e-collection platform. VR-12 physical and mental component scores (PCS, MCS) were generated. Patient information was extracted from the electronic health record. Bivariate and multivariate regression analyses were performed. Odds ratios (ORs) and 95% confidence intervals were reported.Results:In univariate analysis, patients with HOOS/KOOS, VR-12 PCS, and MCS in the ≤25th percentile group were more likely to have an ASA score of ≥3 compared with those with higher scores. In multivariate analysis, increased and decreased odds of low HOOS/KOOS were associated with a one-unit increase in Charlson Comorbidity Index (OR, 1.16) and VR-12 MCS (OR, 0.97), respectively. Increased odds of low baseline VR-12 PCS and MCS were associated with ASA class ≥3 (OR, 1.65 and 1.40). Decreased odds of a low MCS were associated with an increase in HOOS/KOOS (OR, 0.98) (P ≤ 0.05 for all).Conclusion:Of the factors that are associated with low baseline PRO scores, preoperatively addressing mismanaged comorbidities, mental health, and physical function were identified as the best modifiable factors for optimization, which may result in improved baseline PROs before TJR.

Productivity growth of skilled nursing facilities in the treatment of post-acute-care-intensive conditions.

BackgroundHealth care is believed to be suffered from a “cost disease,” in which a heavy reliance on labor limits opportunities for efficiencies stemming from technological improvement. Although recent evidence shows that U.S. hospitals have experienced a positive trend of productivity growth, skilled nursing facilities are relatively “low-tech” compared to hospitals, leading some to worry that productivity at skilled nursing facilities will lag behind the rest of the economy.ObjectiveTo assess productivity growth among skilled nursing facilities (SNFs) in the treatment of conditions which frequently involve substantial post-acute care after hospital discharge.MethodsWe constructed an analytic file with the records of Medicare beneficiaries that were discharged from acute-care hospitals to SNFs with stroke, hip fracture, or lower extremity joint replacement (LEJR) between 2006 and 2014. We populated each record for 90 days starting at the time of SNF admission, detailing for each day the treatment site and all associated costs. We used ordinary least square regression to estimate growth in SNF productivity, measured by the ratio of “high-quality SNF stays” to total treatment costs. The primary definition of a high-quality stay was a stay that ended with the return of the patient to the community within 90 days after SNF admission. We controlled for patient demographics and comorbidities in the regression analyses.ResultsOur sample included 1,076,066 patient stays at 14,394 SNFs with LEJR, 315,546 patient stays at 14,154 SNFs with stroke, and 739,608 patient stays at 14,588 SNFs with hip fracture. SNFs improved their productivity in the treatment of patients with LEJR, stroke, and hip fracture by 1.1%, 2.2%, and 2.0% per year, respectively. That pattern was robust to a number of alternative specifications. Regressions on year dummies showed that the productivity first decreased and then increased, with a lowest point in 2011. Over the study period, quality continued to rise, but dominated by higher costs at first. Costs then started to decrease, driving productivity to grow.ConclusionThere has been substantial productivity growth in recent years among SNFs in the U.S. in the treatment of post-acute-care-intensive conditions.

Post-Acute Care After Joint Replacement in Medicare's Bundled Payments for Care Improvement Initiative.

Bundled payments, in which services provided around a care episode are linked together, are being tested under Medicare's Bundled Payments for Care Improvement (BPCI) program. Reducing post-acute care (PAC) is critical under bundled payment, but little is known about whether this is done through provider selection or consolidation, and whether particular patterns of changes in PAC are associated with success under the program. To characterize patterns of change in PAC under lower-extremity joint replacement episodes in BPCI. Retrospective difference-in-differences study. US Medicare, 2013 to 2015. A total of 264 US hospitals participating in BPCI for lower-extremity joint replacement and matched controls. Participation in BPCI. Use and duration of institutional PAC (proportion discharged to a skilled nursing facility, an inpatient rehabilitation facility, and a long-term care hospital), dispersion of PAC (proportion of discharges to commonly used providers), and quality of PAC (Star Ratings, readmission rates, length of stay, and nurse staffing); part A Medicare payments. BPCI participants decreased the use and duration of institutional PAC compared to controls: overall institutional PAC declined 4.4% in BPCI hospitals vs 2.1% in non-BPCI hospitals (difference = -2.2%; P = .033), and duration decreased by 1.6 days in BPCI hospitals compared to 0.0 days in non-BPCI hospitals (difference in differences = -1.5 days; P < .001). However, BPCI participants did not change their PAC referral patterns to reduce dispersion or refer patients to higher-quality PAC providers. Hospitals that were more successful in reducing Medicare payments started with higher payments and higher use of institutional PAC settings and demonstrated greater drops in use and duration of institutional PAC, but no differences in dispersion or referral to high-quality providers. Reductions in spending under BPCI were driven by a shift from higher- to lower-cost discharge settings, and by shortening the duration of institutional PAC. Hospitals that reduced payments the most had the highest spending at baseline. J Am Geriatr Soc 67:1027-1035, 2019.

Relationship between hospital size and teaching status on outcomes for reverse shoulder arthroplasty.

The use of reverse shoulder arthroplasty (RSA) continues to grow with expanding indications and increased surgeon awareness. Previous data for other lower extremity joint replacements indicate that high-volume centers have better outcomes, with lower complication rates, decreased length of stay, and complications for both hemiarthroplasty and total shoulder arthroplasty. The purpose of this study is to evaluate the effects of hospital size and setting on adverse events for RSA. The National Inpatient Sample database was queried for RSA performed using ICD-9 codes. Primary outcomes included length of stay (LOS), total hospital charges, discharge disposition, and postoperative complications. Odds ratios were used to assess the risk of inpatient postoperative complications. A weighted national estimate of 24,056 discharges for patients undergoing RSA was included in the study. Patients at larger hospitals experienced higher total charges, increased average LOS, and slightly higher complication rates compared to those of small and medium hospitals. Patients in larger hospitals had significantly increased rates of genitourinary and central nervous system complications, while patients in small/medium hospitals experienced higher rates of hematoma/seroma. Results from this study indicate that large and non-teaching hospitals overall tend to burden the patients with higher hospital charges, longer hospital stay, and more frequent non-routine discharges. Also, larger hospitals are associated with higher risk of genitourinary and central nervous system complications rates, whereas non-teaching hospitals are associated with lower risk of infection and higher risk of anemia after RSA. With the growth in RSA in the USA, continued attention needs to be placed on improving outcomes and resource utilization for RSA patients even in larger hospitals.

Identifying high-cost episodes in lower extremity joint replacement.

To evaluate the ability of claims-based risk adjustment and incremental components of clinical data to identify 90-day episode costs among lower extremity joint replacement (LEJR) patients according to the Centers for Medicare & Medicaid Services (CMS) Comprehensive Care for Joint Replacement (CJR) program provisions. Medicare fee-for-service (FFS) data for qualifying CJR episodes in the United States, and FFS data linked with clinical data from CJR-qualifying LEJR episodes performed at High Value Healthcare Collaborative (HVHC) and Mayo Clinic in 2013. HVHC and Mayo Clinic populations are subsets of the total FFS population to assess the additive value of additional pieces of clinical data in correctly assigning patients to cost groups. Multivariable logistic models identified high-cost episodes. Clinical data from participating health care systems merged with Medicare FFS data. Our three populations consisted of 363621 patients in the CMS population, 4881 in the HVHC population, and 918 in the Mayo population. When modeling per CJR specifications, we observed low to moderate model performance (CMS C-Stat=0.714; HVHC C-Stat=0.628; Mayo C-Stat=0.587). Adding CMS-HCC categories improved identification of patients in the top 20% of episode costs (CMS C-Stat=0.758, HVHC C-Stat=0.692, Mayo C-Stat=0.677). Clinical variables, particularly functional status in the population for which this was available (Mayo C-Stat=0.783), improved ability to identify patients within cost groups. Policy makers could use these findings to improve payment adjustments for bundled LEJR procedures and in consideration of new data elements for reimbursement.

Eligibility Criteria for Lower Extremity Joint Replacement May Worsen Racial and Socioeconomic Disparities.

Cost-containment strategies may discourage hospitals from performing surgery for patients with preexisting risk factors such as those with high body mass index (BMI), those with high hemoglobin A1c (HbA1c), or those who smoke cigarettes. Because these risk factors may not appear in equal proportions across the population, using these risk factors as inflexible eligibility criteria for lower extremity joint arthroplasty may exacerbate existing racial-ethnic, gender, and socioeconomic disparities pertaining to access to an operation that can improve health and quality of life. However, any effects on such disparities have not yet been quantified nor have the groups been identified that may be most affected by inflexible eligibility criteria. Does the use of inflexible eligibility criteria related to (1) BMI; (2) HbA1c level; and (3) smoking status potentially decrease the odds of lower extremity joint arthroplasty eligibility for members of racial-ethnic minority groups, women, and those of lower socioeconomic status more than it does for non-Hispanic whites, men, and those of higher socioeconomic status? We pooled data from 21,294 adults aged ≥ 50 years from the 1999-2014 National Health and Nutrition Examination Survey (NHANES). NHANES is a nationally administered series of surveys that assess the health and nutritional status of the US population and collect information on many risk factors for diseases. NHANES is uniquely suited to examine our study questions because it includes data from physical examinations and laboratory assessments as well as comprehensive questionnaires, and it is nationally representative. We determined the odds of lower extremity arthroplasty eligibility by running separate multivariable logistic regressions for each criterion (that is, for each dependent variable): (1) BMI < 35 kg/m; (2) BMI < 40 kg/m; (3) HbA1c < 8%; and (4) current nonsmoker status. Independent variables of interest were race-ethnicity, gender, educational level, and annual household income. Each model included all independent variables of interest, age, and survey year. The BMI < 35-kg/m criterion resulted in lower arthroplasty eligibility for non-Hispanic blacks compared with non-Hispanic whites (odds ratio [OR], 0.62; 95% confidence interval [CI], 0.55-0.70; p < 0.001), women versus men (OR, 0.61; 95% CI, 0.55-0.69; p < 0.001), individuals of lower socioeconomic status versus those of higher socioeconomic status (annual household income < USD 45,000 versus ≥ USD 45,000 [OR, 0.81; 95% CI, 0.71-0.93; p = 0.002], and those with a high school degree or less versus those with a degree beyond a high school degree (OR, 0.66; 95% CI, 0.57-0.77; p < 0.001). The HbA1c < 8% criterion resulted in lower arthroplasty eligibility for non-Hispanic blacks (OR, 0.44; 95% CI, 0.37-0.53; p < 0.001) and Hispanics (OR, 0.41; 95% CI, 0.33-0.51; p < 0.001) versus non-Hispanic whites, for individuals of lower socioeconomic status versus those of higher socioeconomic status (OR, 0.73; 95% CI, 0.56-0.94; p = 0.015), and for those with a high school degree or less versus those with a degree beyond a high school degree (OR, 0.58; 95% CI, 0.44-0.77; p < 0.001). Excluding smokers resulted in lower arthroplasty eligibility for non-Hispanic blacks versus non-Hispanic whites (OR, 0.84; 95% CI, 0.73-0.97; p = 0.019), for individuals of lower socioeconomic status versus those of higher socioeconomic status (OR, 0.53; 95% CI, 0.47-0.61; p < 0.001), and for those with a high school degree or less versus those with a degree beyond a high school degree (OR, 0.29; 95% CI, 0.24-0.35; p < 0.001). Payment structures and clinical decision-making algorithms that set inflexible cutoffs with respect to BMI, HbA1c, and smoking status disproportionately discourage performing lower extremity arthroplasty for non-Hispanic blacks and individuals of lower socioeconomic status. We do not advocate performing elective surgery for patients with multiple, uncontrolled medical comorbidities. However, ample evidence suggests that many patients whose BMI values are > 35 kg/m (or even > 40 kg/m) may be reasonable candidates for arthroplasty surgery, and BMI is not an easily modifiable risk factor for many patients. We discourage across-the-board cutoff parameters in these domains because such cutoffs will worsen current racial-ethnic, gender-based, and socioeconomic disparities and limit access to an operation that can improve quality of life. Level III, economic and decision analysis.

Editor's Spotlight/Take 5: Eligibility Criteria for Lower-Extremity Joint Replacement May Worsen Racial and Socioeconomic Disparities.

Editor's Spotlight/Take 5: Eligibility Criteria for Lower-Extremity Joint Replacement May Worsen Racial and Socioeconomic Disparities.

Skilled Nursing Facility Participation in Medicare’s Bundled Payments for Care Improvement Initiative: A Retrospective Study

ObjectiveTo investigate differences in facility characteristics, patient characteristics, and outcomes between skilled nursing facilities (SNFs) that participated in Medicare’s voluntary Bundled Payments for Care Improvement (BPCI) initiative and nonparticipants, prior to BPCI. DesignRetrospective, cross-sectional comparison of BPCI participants and nonparticipants. SettingSNFs. ParticipantsAll Medicare-certified SNFs (N=15,172) and their 2011-2012 episodes of care for chronic obstructive pulmonary disease, congestive heart failure, femur and hip/pelvis fracture, hip and femur procedures, lower extremity joint replacement, and pneumonia (N=873,739). InterventionsParticipation in a bundled payment program that included taking financial responsibility for care within a 90-day episode. Main Outcome MeasuresThis study investigates the characteristics of bundled payment participants and their patient characteristics and outcomes relative to nonparticipants prior to BPCI, to understand the implications of a broader implementation of bundled payments. ResultsSNFs participating in BPCI were more likely to be in urban areas (80.8%-98.4% vs 69.5%) and belong to a chain or system (73.8%-85.5% vs 55%), and were less likely to be located in the south (13.1%-20.2% vs 35.4%). Quality performance was similar or higher in most cases for SNFs participating in BPCI relative to nonparticipants. In addition, BPCI participants admitted higher socioeconomic status patients with similar clinical characteristics. Initial SNF length of stay was shorter and hospital readmission rates were lower for BPCI patients compared to nonparticipant patients. ConclusionsWe found that SNFs participating in the second financial risk-bearing phase of BPCI represented a diversity of SNF types, regions, and levels of quality and the results may provide insight into a broader adoption of bundled payment for postacute providers.

Mandatory Medicare Bundled Payment Program for Lower Extremity Joint Replacement and Discharge to Institutional Postacute Care

Bundled payments are an increasingly common alternative payment model for Medicare, yet there is limited evidence regarding their effectiveness. To report interim outcomes from the first year of implementation of a bundled payment model for lower extremity joint replacement (LEJR). As part of a 5-year, mandatory-participation randomized trial by the Centers for Medicare & Medicaid Services, eligible metropolitan statistical areas (MSAs) were randomized to the Comprehensive Care for Joint Replacement (CJR) bundled payment model for LEJR episodes or to a control group. In the first performance year, hospitals received bonus payments if Medicare spending for LEJR episodes was below the target price and hospitals met quality standards. This interim analysis reports first-year data on LEJR episodes starting April 1, 2016, with data collection through December 31, 2016. Randomization of MSAs into the CJR bundled payment model group (75 assigned; 67 included) or to the control group without the CJR model (121 assigned; 121 included). Instrumental variable analysis was used to evaluate the relationship between inclusion of MSAs in the CJR model and outcomes. The primary outcome was share of LEJR admissions discharged to institutional postacute care. Secondary outcomes included the number of days in institutional postacute care, discharges to other locations, Medicare spending during the episode (overall and for institutional postacute care), net Medicare spending during the episode, LEJR patient volume and patient case mix, and quality-of-care measures. Among the 196 MSAs and 1633 hospitals, 131 285 eligible LEJR procedures were performed during the study period (mean volume, 110 LEJR episodes per hospital) among 130 343 patients (mean age, 72.5 [SD, 0.91] years; 65% women; 90% white). The mean percentage of LEJR admissions discharged to institutional postacute care was 33.7% (SD, 11.2%) in the control group and was 2.9 percentage points lower (95% CI, -4.95 to -0.90 percentage points) in the CJR group. Mean Medicare spending for institutional postacute care per LEJR episode was $3871 (SD, $1394) in the control group and was $307 lower (95% CI, -$587 to -$27) in the CJR group. Mean overall Medicare spending per LEJR episode was $22 872 (SD, $3619) in the control group and was $453 lower (95% CI, -$909 to $3) in the CJR group, a statistically nonsignificant difference. None of the other secondary outcomes differed significantly between groups. In this interim analysis of the first year of the CJR bundled payment model for LEJR among Medicare beneficiaries, MSAs covered by CJR, compared with those that were not, had a significantly lower percentage of discharges to institutional postacute care but no significant difference in total Medicare spending per LEJR episode. Further evaluation is needed as the program is more fully implemented. ClinicalTrials.gov Identifier: NCT03407885; American Economic Association Registry Identifier: AEARCTR-0002521.

Association of Hospital Participation in a Medicare Bundled Payment Program With Volume and Case Mix of Lower Extremity Joint Replacement Episodes

Medicare's Bundled Payments for Care Improvement (BPCI) initiative for lower extremity joint replacement (LEJR) surgery has been associated with a reduction in episode spending and stable-to-improved quality. However, BPCI may create unintended effects by prompting participating hospitals to increase the overall volume of episodes paid for by Medicare, which could potentially eliminate program-related savings or prompt them to shift case mix to lower-risk patients. To evaluate whether hospital BPCI participation for LEJR was associated with changes in overall volume and case mix. Observational study using Medicare claims data and a difference-in-differences method to compare 131 markets (hospital referral regions) with at least 1 BPCI participant hospital (n = 322) and 175 markets with no participating hospitals (n = 1340), accounting for 580 043 Medicare beneficiaries treated before (January 2011-September 2013) and 462 161 after (October 2013-December 2015) establishing the BPCI initiative. Hospital-level case-mix changes were assessed by comparing 265 participating hospitals with a 1:1 propensity-matched set of nonparticipating hospitals from non-BPCI markets. Hospital BPCI participation. Changes in market-level LEJR volume in the before vs after BPCI periods and changes in hospital-level case mix based on demographic, socioeconomic, clinical, and utilization factors. Among the 1 717 243 Medicare beneficiaries who underwent LEJR (mean age, 75 years; 64% women; and 95% nonblack race/ethnicity), BPCI participation was not significantly associated with a change in overall market-level volume. The mean quarterly market volume in non-BPCI markets increased 3.8% from 3.8 episodes per 1000 beneficiaries before BPCI to 3.9 episodes per 1000 beneficiaries after BPCI was launched. For BPCI markets, the mean quarterly market volume increased 4.4% from 3.6 episodes per 1000 beneficiaries before BPCI to 3.8 episodes per 1000 beneficiaries after BPCI was launched. The adjusted difference-in-differences estimate between the market types was 0.32% (95% CI, -0.06% to 0.69%; P = .10). Among 20 demographic, socioeconomic, clinical, and utilization factors, BPCI participation was associated with differential changes in hospital-level case mix for only 1 factor, prior skilled nursing facility use (adjusted difference-in-differences estimate, -0.53%; 95% CI, -0.96% to -0.10%; P = .01) in BPCI vs non-BPCI markets. In this observational study of Medicare beneficiaries who underwent LEJR, hospital participation in Bundled Payments for Care Improvement was not associated with changes in market-level lower extremity joint replacement volume and largely was not associated with changes in hospital case mix. These findings may provide reassurance regarding 2 potential unintended effects associated with bundled payments for LEJR.