Successful Discharge to Community From Home Health Less Likely for People in Late Stages of Dementia.

BACKGROUND AND PURPOSE: Several studies have established the efficacy of home health in meeting the health care needs of people with Alzheimer disease and related dementias (ADRD) and helping them to remain at home. However, transitioning to the community after discharge from home health presents challenges to patient safety and quality of life. The severity of an individual's functional impairments, cognitive limitations, and behavioral and psychological symptoms may compound these challenges. The purpose of this study was to examine the association between dementia severity and successful discharge to community (DTC) from home health. METHODS: This was a retrospective study of 142 376 Medicare beneficiaries with ADRD. Successful DTC was defined as having no unplanned hospitalization or death within 30 days of DTC from home health. Successful DTC rates were calculated, and multilevel logistic regression was used to estimate the relative risk (RR) of successful DTC, by dementia severity category, adjusted for patient and clinical characteristics. Six dementia severity categories were identified using a crosswalk between items on the Outcome and Assessment Information Set and the Functional Assessment Staging Tool. RESULTS AND DISCUSSION: Successful DTC occurred in 71.2% of beneficiaries. Beneficiaries in the 2 most severe dementia categories had significantly lower risk of successful DTC (category 6: RR = 0.90, 95% CI = 0.889-0.910; category 7: RR = 0.737, 95% CI = 0.704-0.770) than those in the least severe dementia category. The RR of successful DTC for people with ADRD decreased as the level of independence with oral medication management decreased and when there was an overall greater need for caregiver assistance. CONCLUSIONS: Patient status at the time of admission to home health is associated with outcomes after discharge from home health. Early identification of people in advanced stages of ADRD provides an opportunity to implement strategies to facilitate successful DTC while people are still receiving home care services. The severity of ADRD and availability of caregiver assistance should be key considerations in planning for successful DTC for people with ADRD.

Association of Dementia Severity and Caregiver Support With Early Discharge From Home Health.

INTRODUCTION: The objective of this study was to examine the relationship between dementia severity and early discharge from home health. METHODS: This was a retrospective study of 100% national Medicare home health da ta files (2016-2017). Multilevel logistic regression was used to study the relationship of dementia severity, caregiver support, and medication assistance with early discharge from home health. RESULTS: The final cohort consisted of 91 302 Medicare beneficiaries with an ADRD diagnosis. A pattern of early discharge rates across dementia severity levels was not demonstrated. The relative risk for early discharge was lower for individuals who needed assistance with medication and for those with unmet caregiver needs. DISCUSSION: The findings of this study do not support the hypothesis that dementia severity contributes to early discharge from home health. Further research is needed to fully understand key factors contributing to early discharge from home health.

Home health utilization association with discharge to community for people with dementia.

Introduction: The objective of this study was to identify home health utilization factors associated with successful discharge to community after home health care for patients with and without Alzheimer's disease and related dementias (ADRD). Methods: This was a retrospective study of 100% national Medicare home health data files (2016 to 2017). Multilevel logistic regression was used to study the relationship of home health utilization with a modified definition of successful discharge to community (M-SDC) after home health (no readmission or discharge within 30 days). Significant interactions were identified using backward selection. The associations between domains were examined in a model stratified by ADRD, with and without controlling for mobility, self-care, and caregiver assistance. Results: The cohort consisted of 535,691 patients, 18.0% with ADRD. The overall M-SDC rate was 92.1%. The likelihood of M-SDC was increased when physical therapy services were provided, episodes of care were longer than 15 days, and the total number of therapy visits was greater than 10. The likelihood of M-SDC decreased when speech therapy, nursing, and home health aide services were provided and when patients were discharged early. When controlling for mobility, self-care, and caregiver support, length of home health episode was the only characteristic that showed a significant interaction with ADRD. Discussion: The results of this study indicate that the provision of physical therapy services and moderate lengths of care and volume of visits are associated with increased likelihood of M-SDC. A decreased likelihood of M-SDC when speech therapy, nursing, and home health aide services are delivered may be a proxy indicator of patient acuity and disease severity and needs to be further investigated. An important next step in understanding home health access and outcomes for people with ADRD is to examine the impact of the Patient-Driven Groupings Model on home health utilization characteristics, especially length of episodes. Highlights: Most people remain in the community after discharge from home health.Likelihood of modified successful discharge to community (M-SDC) increased with physical therapy, longer episodes, and more than 10 visits.Likelihood of M-SDC decreased with speech therapy, skilled nursing, home health aide visits, and early discharge.Longer home health episodes increased likelihood of M-SDC for people with Alzheimer's disease and related dementias.

Examining the Clinical Utility of the Brief Interview for Mental Status.

The Brief Interview for Mental Status (BIMS) is used to identify delirium and needed supports in patients living in skilled nursing facilities (SNFs) and long-term care facilities (LTCFs). We analyzed 3,537,404 patients discharged from acute hospitals to SNFs or LTCFs with factor and Rasch analyses to examine the clinical utility of the BIMS. More than 40% of the sample had maximum scores, indicating a ceiling effect. "Repetition of three words" was the easiest and the only misfit item (Outfit = 3.14). The ability of the BIMS to distinguish individuals into two cognitive levels (with person strata of 1.48) was limited. Although the BIMS is a widely used screening tool for cognitive impairment, we found it lacked sensitivity for approximately one half of patients admitted to SNFs/LTCFs. Our results suggest the BIMS should be interpreted with caution, particularly for patients with mild cognitive impairment. [Research in Gerontological Nursing, 15(3), 124-130.].

Characterizing Standardized Functional Data at Inpatient Rehabilitation Facilities.

OBJECTIVE: The Improving Medicare Post-Acute Care Transformation Act of 2014 mandates using standardized patient functional data across post-acute settings. This study characterized similarities and differences in clinician-observed scores of self-care and transfer items for the standardized section GG functional domain and the functional independent measure (FIM) at inpatient rehabilitation facilities. DESIGN: We conducted secondary analyses of 2017 Uniform Data System for Medical Rehabilitation national data. Patients were assessed by clinicians on both section GG and FIM at admission and discharge. We identified 7 self-care items and 6 transfer items in section GG conceptually equivalent with FIM. Clinician-assessed scores for each pair of items were examined using score distributions, Bland-Altman plot, correlation (Pearson coefficients), and agreement (kappa and weighted kappa) analyses. SETTING AND PARTICIPANTS: In all, 408,491 patients were admitted to Uniform Data System for Medical Rehabilitation-affiliated inpatient rehabilitation facilities with one of the following impairments: stroke, brain dysfunction, neurologic condition, orthopedic disorders, and debility. MEASURES: Section GG and FIM. RESULTS: Patients were scored as more functionally independent in section GG compared with FIM, but change score distributions and score orders within impairment groups were similar. Total scores in section GG had strong positive correlations (self-care: r = 0.87 and 0.95; transfer: r = 0.82 and 0.90 at admission and discharge, respectively) with total FIM scores. Weak to moderate ranking agreements with total FIM scores were observed (self-care: kappa = 0.49 and 0.60; transfers: kappa = 0.43 and 0.52 at admission and discharge, respectively). Lower agreements were observed for less able patients at admission and for higher ability patients of their change scores. CONCLUSIONS AND IMPLICATIONS: Overall, response patterns were similar in section GG and FIM across impairments. However, variations exist in score distributions and ranking agreement. Future research should examine the use of GG codes to maintain effective care, outcomes, and unbiased reimbursement across post-acute settings.

Arthritis, physical function, and disability among older Mexican Americans over 23 years of follow-up.

OBJECTIVE: Arthritis is a common chronic condition in the ageing population. Its impact on physical function varies according to sociodemographic and race/ethnic factors. The study objective was to examine the impact of arthritis on physical function and disability among non-disabled older Mexican Americans over time. DESIGN: A 23-year prospective cohort study of 2230 Mexican Americans aged 65 years and older from the Hispanic Established Population for the Epidemiologic Study of the Elderly (1993/94-2016). The independent variable was self-reported physician-diagnosed arthritis, and the outcomes included Activities of Daily Living (ADL), Instrumental Activities of Daily Living (IADL), mobility, Short Physical Performance Battery (SPPB), and handgrip strength. Covariates were sociodemographic, medical conditions, body mass index, depressive symptoms, and cognitive function. General linear mixed models were performed to estimate the change in SPPB and muscle strength. General Equation Estimation models estimated the odds ratios (OR) of becoming ADL- or IADL- or mobility - disabled as a function of arthritis. All variables were used as time-varying except for sex, education, and nativity. RESULTS: Overall, participants with arthritis had higher odds ratio (OR) of any ADL [OR = 1.35, 95% Confidence Interval (CI) = 1.09-1.68] and mobility (OR = 1.34, 95% CI = 1.18-1.52) disability over time than those without arthritis, after controlling for all covariates. Women, but not men, reporting arthritis had increased risk for ADL and mobility disability. The total SPPB score declined 0.18 points per year among those with arthritis than those without arthritis, after controlling for all covariates (p-value < .010). CONCLUSIONS: Our study demonstrates the independent effect of arthritis in increasing ADL and mobility disability and decreased physical function in older Mexican Americans over 23-years of follow-up.

Association Between Cognitive Status and Falls With and Without Injury During a Skilled Nursing Facility Short Stay.

OBJECTIVES: To examine the relationship between cognitive status and falls with and without injury among older adults during the first 18 days of a skilled nursing facility (SNF) and determine if this association is mediated by limitations in activities of daily living (ADL) and impaired balance. DESIGN: Cohort study of Medicare fee-for-service beneficiaries admitted to an SNF between October 1, 2016, and September 31, 2017. SETTINGS AND PARTICIPANTS: 815,927 short-stay nursing home residents admitted to an SNF within 3 days of hospital discharge. METHODS: Cognitive status at SNF admission was classified as intact, mild, moderate, or severe impairment. Residents were classified as having no falls, a fall without injury, and a fall with a minor or major injury. We used ordinal logistic regression to model the association between cognitive status and falls adjusting for resident and facility characteristics. A causal mediation analysis was used to test for the mediating effects of ADL limitations and impaired balance on the association between cognitive status and falls with an injury. RESULTS: Mild, moderate, and severe cognitive impairment were associated with 1.72 (95% CI: 1.68-1.75), 2.72 (95% CI: 2.66-2.78), and 2.61 (95% CI: 2.48-2.75) higher odds of being in a higher fall severity category, respectively, compared to being cognitively unimpaired. Greater ADL limitations and impaired balance were significantly associated with falls, but each mediated the association between cognitive status and falls by less than 2%. CONCLUSIONS AND IMPLICATIONS: Older adults with cognitive impairment are more likely to experience a fall during an SNF stay. ADL limitations and impaired balance are risk factors for falls but may not contribute to the increased fall risk for SNF residents with cognitive impairment. Continued research is needed to better understand the risk factors for falls among SNF residents with cognitive impairment.

Functional Status Across Post-Acute Settings is Associated With 30-Day and 90-Day Hospital Readmissions.

OBJECTIVE: To examine the association between cocalibrated functional scores across post-acute care settings and the subsequent risk of hospital readmission. DESIGN: Retrospective cohort study. SETTING AND PARTICIPANTS: We analyzed 781,021 fee-for-service Medicare beneficiaries discharged to either inpatient rehabilitation facilities (IRFs), skilled nursing facilities (SNFs), or home health agencies (HHA) after an acute hospital stay for stroke (N = 143,277), lower extremity joint replacements (512,577), and hip/femur fracture (125,167) between January 1, 2013, and August 31, 2014. MEASURES: Functional items from IRF-PAI, MDS, and OASIS were categorized into self-care and mobility domains. We cocalibrated admission functional scores across post-acute settings and divided scores into 4 functional levels using quartiles (Q1-Q4, with Q4 representing the most independent function). The primary outcomes were 30-day and 90-day hospital readmissions (yes/no) after an initial post-acute stay. RESULTS: Patients who were more dependent in self-care and mobility at the initial post-acute setting were significantly more likely to experience hospital readmission [eg, hazard ratios of 30-day readmission in stroke: 1.54 (95% confidence interval [CI] 1.47-1.61), 1.18 (95% CI 1.14-1.23), and 1.12 (95% CI 1.08-1.16) for Q1, Q2 and Q3, compared to Q4]. We found similar results for risk of 90-day hospital readmission across impairment conditions. CONCLUSIONS AND IMPLICATIONS: Patients who were more functionally dependent at the initial post-acute setting had a higher risk to readmit to the hospitals after discharging from the post-acute setting for 30 and 90 days, compared with patients who were more functionally independent. This finding is consistent across impairment conditions and post-acute settings. Future research should determine effective strategies of maintaining and facilitating functional performance across post-acute settings to optimize long-term patient outcomes.

Clinical Performance Measures for Stroke Rehabilitation: Performance Measures From the American Heart Association/American Stroke Association.

The American Heart Association/American Stroke Association released the adult stroke rehabilitation and recovery guidelines in 2016. A working group of stroke rehabilitation experts reviewed these guidelines and identified a subset of recommendations that were deemed suitable for creating performance measures. These 13 performance measures are reported here and contain inclusion and exclusion criteria to allow calculation of rates of compliance in a variety of settings ranging from acute hospital care to postacute care and care in the home and outpatient setting.

Documentation of Dementia as a Cause of Death Among Mexican-American Decedents Diagnosed with Dementia.

BACKGROUND: Hispanic older adults are a high-risk population for Alzheimer's disease and related dementias (ADRD) but are less likely than non-Hispanic White older adults to have ADRD documented as a cause of death on a death certificate. OBJECTIVE: To investigate characteristics associated with ADRD as a cause of death among Mexican-American decedents diagnosed with ADRD. METHODS: Data came from the Hispanic Established Populations for the Epidemiologic Study of the Elderly, Medicare claims, and National Death Index. RESULTS: The final sample included 853 decedents diagnosed with ADRD of which 242 had ADRD documented as a cause of death. More health comorbidities (OR = 0.40, 95% CI = 0.28-0.58), older age at death (OR = 1.18, 95% CI = 1.03-1.36), and longer ADRD duration (OR = 1.08, 95% CI = 1.03-1.14) were associated with ADRD as a cause of death. In the last year of life, any ER admission without a hospitalization (OR = 0.45, 95% CI = 0.22-0.92), more physician visits (OR = 0.96, 95% CI = 0.93-0.98), and seeing a medical specialist (OR = 0.46, 95% CI = 0.29-0.75) were associated with lower odds for ADRD as a cause of death. In the last 30 days of life, any hospitalization with an ICU stay (OR = 0.55, 95% CI = 0.36-0.82) and ER admission with a hospitalization (OR = 0.67, 95% CI = 0.48-0.94) were associated with lower odds for ADRD as a cause of death. Receiving hospice care in the last 30 days of life was associated with 1.98 (95% CI = 1.37-2.87) higher odds for ADRD as a cause of death. CONCLUSION: Under-documentation of ADRD as a cause of death may reflect an underestimation of resource needs for Mexican-Americans with ADRD.

Relationship Between Nursing Home Compare Improvement in Function Quality Measure and Physical Recovery After Hip Replacement.

OBJECTIVE: To determine whether patients with a total or partial hip replacement admitted to a skilled nursing facility (SNF) after the improvement in function quality measure was added to Nursing Home Compare in July 2016 have greater physical recovery than patients admitted before July 2016. DESIGN: Pre (January 1, 2015-June 30, 2016) vs post (July 1, 2016-December 31, 2017) design. SETTING: Skilled nursing facilities (n=12,829). PARTICIPANTS: Medicare fee-for-service beneficiaries (N=106,832) discharged from acute hospitals to SNF after hip replacement between January 1, 2015 and December 31, 2017. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: The 5- and 14-day minimum data set assessments were used to calculate total scores for the quality measure, self-care, mobility, and balance. We calculated the average adjusted change per 10 days and any improvement between the 5- and 14-day assessments. RESULTS: The average adjusted change per 10 days for the quality measure total score for patients admitted before July 2016 and after July 2016 was 1.00 points (standard error, 0010) and 1.06 points (standard error, 0.010), respectively (P<.01). This was a relative increase of 6.0%. Among patients admitted to a SNF before July 2016, 44.4% (standard error, 0.06) had any improvement in the quality measure total score compared with 45.5% (standard error, 0.23) of patients admitted after July 2016 (P<.01). This was a relative increase of 2.5%. The adjusted change per 10 days and percentage of patients who had any improvement in the total scores for self-care, mobility, and balance were all significantly higher after July 2016. CONCLUSIONS: Patients admitted to a SNF after a hip replacement after July 2016 had greater physical recovery than patients admitted before the improvement in function quality measure was added to Nursing Home Compare.

Mobility and Self-Care are Associated With Discharge to Community After Home Health for People With Dementia.

OBJECTIVES: A priority health outcome for patients, families, and the Centers for Medicare & Medicaid Services (CMS) is a patient's ability to return home and remain in the community without adverse events following discharge from post-acute care services. Successful discharge to community (DTC) is defined as being discharged to the community and not experiencing a readmission or death within 30 days of discharge. The objective of this study was to determine the association between patient factors and successful DTC after home health for individuals with Alzheimer's disease and related dementias (ADRD). DESIGN: This retrospective study derived data from 100% national CMS data files from October 1, 2016, through September 30, 2017. SETTINGS AND PARTICIPANTS: Criteria from the Home Health Quality Reporting program were used to identify a cohort of 790,439 Medicare home health beneficiaries, 143,164 (18.0%) with ADRD. MEASURES: Successful DTC rates with associated 95% confidence intervals (CIs) were calculated for each patient characteristic. Multilevel logistic regression was used to estimate the relative risk (RR) of successful DTC after home health, by ADRD diagnosis, mobility, self-care, caregiver support, and medication management, adjusted for patient demographics and clinical characteristics. RESULTS: Overall, 79.4% of beneficiaries had a successful DTC. Beneficiaries with ADRD had a significantly lower odds of successful DTC than those without ADRD (RR=0.947, 95% CI=0.944-0.950). This association remained significant after adjustment for caregiver support, assistance with medications, independence in mobility, and level of self-care. Greater need for caregiver support, greater need for assistance with medications, greater dependence in mobility, and greater self-care dependence were all associated with decreased risk of successful DTC. CONCLUSIONS AND IMPLICATIONS: Older adults with ADRD receiving home health had decreased RR of successful DTC. To have a successful DTC, older adults with ADRD need sufficient support from caregivers and independence in functioning.

Association of Social Behaviors With Community Discharge in Patients with Total Hip and Knee Replacement.

OBJECTIVES: Understand the association between social determinants of health and community discharge after elective total joint arthroplasty. DESIGN: Retrospective cohort design using Optum de-identified electronic health record dataset. SETTING AND PARTICIPANTS: A total of 38 hospital networks and 18 non-network hospitals in the United States; 79,725 patients with total hip arthroplasty and 136,070 patients with total knee arthroplasty between 2011 and 2018. METHODS: Logistic regression models were used to examine the association among pain, weight status, smoking status, alcohol use, substance disorder, and postsurgical community discharge, adjusted for patient demographics. RESULTS: Mean ages for patients with hip and knee arthroplasty were 64.5 (SD 11.3) and 65.9 (SD 9.6) years; most patients were women (53.6%, 60.2%), respectively. The unadjusted community discharge rate was 82.8% after hip and 81.1% after knee arthroplasty. After adjusting for demographics, clinical factors, and behavioral factors, we found obesity [hip: odds ratio (OR) 0.81, 95% confidence interval (CI) 0.76-0.85; knee: OR 0.73, 95% CI 0.69-0.77], current smoking (hip: OR 0.82, 95% CI 0.77-0.88; knee: OR 0.90, 95% CI 0.85-0.95), and history of substance use disorder (hip: OR 0.55, 95% CI 0.50-0.60; knee: OR 0.57, 95% CI 0.53-0.62) were associated with lower odds of community discharge after hip and knee arthroplasty, respectively. CONCLUSIONS AND IMPLICATIONS: Social determinants of health are associated with odds of community discharge after total hip and knee joint arthroplasty. Our findings demonstrate the value of using electronic health record data to analyze more granular patient factors associated with patient discharge location after total joint arthroplasty. Although bundled payment is increasing community discharge rates, post-acute care facilities must be prepared to manage more complex patients because odds of community discharge are diminished in those who are obese, smoking, or have a history of substance use disorder.

Changes in Health Care Use by Mexican American Medicare Beneficiaries Before and After a Diagnosis of Dementia.

BACKGROUND: Evidence from predominantly non-Hispanic White cohorts indicates health care utilization increases before Alzheimer's disease and related dementias (ADRD) is diagnosed. We investigated trends in health care utilization by Mexican American Medicare beneficiaries before and after an incident diagnosis of ADRD. METHODS: Data came from the Hispanic Established Populations for the Epidemiological Study of the Elderly that has been linked with Medicare claims files from 1999 to 2016 (n = 558 matched cases and controls). Piecewise regression and generalized linear mixed models were used to compare the quarterly trends in any (ie, one or more) hospitalizations, emergency room (ER) admissions, and physician visits for 1 year before and 1 year after ADRD diagnosis. RESULTS: The piecewise regression models showed that the per-quarter odds for any hospitalizations (odds ratio [OR] = 1.62, 95% CI = 1.43-1.84) and any ER admissions (OR = 1.40, 95% CI = 1.27-1.54) increased before ADRD was diagnosed. Compared to participants without ADRD, the percentage of participants with ADRD who experienced any hospitalizations (27.2% vs 14.0%) and any ER admissions (19.0% vs 11.7%) was significantly higher at 1 quarter and 3 quarters before ADRD diagnosis, respectively. The per-quarter odds for any hospitalizations (OR = 0.88, 95% CI = 0.80-0.97) and any ER admissions (OR = 0.89, 95% CI = 0.82-0.97) decreased after ADRD was diagnosed. Trends for any physician visits before or after ADRD diagnosis were not statistically significant. CONCLUSIONS: Older Mexican Americans show an increase in hospitalizations and ER admissions before ADRD is diagnosed, which is followed by a decrease after ADRD diagnosis. These findings support the importance of a timely diagnosis of ADRD for older Mexican Americans.

Readmissions Reduction Program: Mortality and Readmissions for Chronic Obstructive Pulmonary Disease.

Rationale: Implementation of the Hospital Readmissions Reduction Program (HRRP) following discharge of patients with chronic obstructive pulmonary disease (COPD) has led to a reduction in 30-day readmissions with unknown effects on postdischarge mortality.Objectives: To examine the association of HRRP with 30-day hospital readmission and 30-day postdischarge mortality rate in patients after discharge from COPD hospitalization.Methods: Retrospective cohort study of readmission and mortality rates in a national cohort (N = 4,587,542) of admissions of Medicare fee-for-service beneficiaries 65 years or older with COPD from 2006 to 2017.Measurements and Main Results: Data were analyzed for three nonoverlapping periods based on implementation of the HRRP specific to COPD: 1) preannouncement (December 2006 to March 2010), 2) announcement (April 2010 to August 2014), and 3) implementation (October 2014 to November 2017). The 30-day readmission rate decreased from 20.54% in the preannouncement period (December 2006 to July 2008) to 18.74% in the implementation period (May 2016 to November 2017). The 30-day risk-standardized postdischarge mortality rates were 6.91%, 6.59%, and 7.30% for the preannouncement, announcement, and implementation periods, respectively. Generalized estimating equations analyses estimated an additional 1,196 deaths (October 2014 to April 2016) and 3,858 deaths (May 2016 to November 2017) during the HRRP implementation period.Conclusions: We found a reduction in 30-day all-cause readmission rate during the implementation period compared with the preannouncement phase. HRRP implementation was also associated with a significant increase in 30-day mortality after discharge from COPD hospitalization. Additional research is necessary to confirm our findings and understand the factors contributing to increased mortality in patients with COPD in the HRRP implementation period.

Understanding Variation in Postacute Care: Developing Rehabilitation Service Areas Through Geographic Mapping.

OBJECTIVE: The aims of the study were to demonstrate a method for developing rehabilitation service areas and to compare service areas based on postacute care rehabilitation admissions to service areas based on acute care hospital admissions. DESIGN: We conducted a secondary analysis of 2013-2014 Medicare records for older patients in Texas (N = 469,172). Our analysis included admission records for inpatient rehabilitation facilities, skilled nursing facilities, long-term care hospitals, and home health agencies. We used Ward's algorithm to cluster patient ZIP Code Tabulation Areas based on which facilities patients were admitted to for rehabilitation. For comparison, we set the number of rehabilitation clusters to 22 to allow for comparison to the 22 hospital referral regions in Texas. Two methods were used to evaluate rehabilitation service areas: intraclass correlation coefficient and variance in the number of rehabilitation beds across areas. RESULTS: Rehabilitation service areas had a higher intraclass correlation coefficient (0.081 vs. 0.076) and variance in beds (27.8 vs. 21.4). Our findings suggest that service areas based on rehabilitation admissions capture has more variation than those based on acute hospital admissions. CONCLUSIONS: This study suggests that the use of rehabilitation service areas would lead to more accurate assessments of rehabilitation geographic variations and their use in understanding rehabilitation outcomes.

Impact of Diabetes on 90-Day Episodes of Care After Elective Total Joint Arthroplasty Among Medicare Beneficiaries.

BACKGROUND: In an effort to improve quality and reduce costs, reimbursement for total knee arthroplasty (TKA) and total hip arthroplasty (THA) in the United States is being based on the value of care provided, with adjustments for some qualifying comorbidities, including diabetes in its most severe form and excluding many diabetes codes. The aims of this study were to examine the effects of diabetes on elective TKA or THA complications and readmission risks among Medicare beneficiaries. METHODS: Complication (n = 521,230) and readmission (n = 515,691) data were extracted from Medicare files in 2013 and 2014. Diabetes status (no diabetes, controlled-uncomplicated diabetes, controlled-complicated diabetes, and uncontrolled diabetes) was identified with ICD-9 (International Classification of Diseases, 9th Revision) codes. TKA or THA complications and readmission odds based on diabetes status were estimated using logistic regression and adjusted for sociodemographic and clinical characteristics, including comorbidities. RESULTS: Compared with no diabetes, the odds ratio (OR) of TKA complications was significantly higher for uncontrolled diabetes (1.29, 95% confidence interval [CI] = 1.06 to 1.57). The OR of THA complications was significantly higher for controlled-complicated diabetes (1.45, 95% CI = 1.17 to 1.80). The OR of readmission was significantly higher for all diabetes groups (1.21 to 1.48 for TKA, 1.20 to 1.70 for THA). CONCLUSIONS: Readmission odds were higher in all diabetes categories. The uncontrolled-diabetes group had the greatest TKA readmission and complication odds. The controlled-complicated diabetes group had the greatest THA readmission and complication odds. The findings suggest that including diabetes and associated systemic complications in cost adjustments in alternative payment models for arthroplasty should be considered. LEVEL OF EVIDENCE: Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.

How High-Risk Comorbidities Co-Occur in Readmitted Patients With Hip Fracture: Big Data Visual Analytical Approach.

BACKGROUND: When older adult patients with hip fracture (HFx) have unplanned hospital readmissions within 30 days of discharge, it doubles their 1-year mortality, resulting in substantial personal and financial burdens. Although such unplanned readmissions are predominantly caused by reasons not related to HFx surgery, few studies have focused on how pre-existing high-risk comorbidities co-occur within and across subgroups of patients with HFx. OBJECTIVE: This study aims to use a combination of supervised and unsupervised visual analytical methods to (1) obtain an integrated understanding of comorbidity risk, comorbidity co-occurrence, and patient subgroups, and (2) enable a team of clinical and methodological stakeholders to infer the processes that precipitate unplanned hospital readmission, with the goal of designing targeted interventions. METHODS: We extracted a training data set consisting of 16,886 patients (8443 readmitted patients with HFx and 8443 matched controls) and a replication data set consisting of 16,222 patients (8111 readmitted patients with HFx and 8111 matched controls) from the 2010 and 2009 Medicare database, respectively. The analyses consisted of a supervised combinatorial analysis to identify and replicate combinations of comorbidities that conferred significant risk for readmission, an unsupervised bipartite network analysis to identify and replicate how high-risk comorbidity combinations co-occur across readmitted patients with HFx, and an integrated visualization and analysis of comorbidity risk, comorbidity co-occurrence, and patient subgroups to enable clinician stakeholders to infer the processes that precipitate readmission in patient subgroups and to propose targeted interventions. RESULTS: The analyses helped to identify (1) 11 comorbidity combinations that conferred significantly higher risk (ranging from P<.001 to P=.01) for a 30-day readmission, (2) 7 biclusters of patients and comorbidities with a significant bicluster modularity (P<.001; Medicare=0.440; random mean 0.383 [0.002]), indicating strong heterogeneity in the comorbidity profiles of readmitted patients, and (3) inter- and intracluster risk associations, which enabled clinician stakeholders to infer the processes involved in the exacerbation of specific combinations of comorbidities leading to readmission in patient subgroups. CONCLUSIONS: The integrated analysis of risk, co-occurrence, and patient subgroups enabled the inference of processes that precipitate readmission, leading to a comorbidity exacerbation risk model for readmission after HFx. These results have direct implications for (1) the management of comorbidities targeted at high-risk subgroups of patients with the goal of pre-emptively reducing their risk of readmission and (2) the development of more accurate risk prediction models that incorporate information about patient subgroups.

Effect of Electronic Activity Monitors and Pedometers on Health: Results from the TAME Health Pilot Randomized Pragmatic Trial.

Background: Brief counseling and self-monitoring with a pedometer are common practice within primary care for physical activity promotion. It is unknown how high-tech electronic activity monitors compare to pedometers within this setting. This study aimed to investigate the outcomes, through effect size estimation, of an electronic activity monitor-based intervention to increase physical activity and decrease cardiovascular disease risk. Method: The pilot randomized controlled trial was pre-registered online at clinicaltrials.gov (NCT02554435). Forty overweight, sedentary participants 55-74 years of age were randomized to wear a pedometer or an electronic activity monitor for 12 weeks. Physical activity was measured objectively for 7 days at baseline and follow-up by a SenseWear monitor and cardiovascular disease risk was estimated by the Framingham risk calculator. Results: Effect sizes for behavioral and health outcomes ranged from small to medium. While these effect sizes were favorable to the intervention group for physical activity (PA) (d = 0.78) and general health (d = 0.39), they were not favorable for measures. Conclusion: The results of this pilot trial show promise for this low-intensity intervention strategy, but large-scale trials are needed to test its efficacy.