Cost, utilization, and policy of provision of assistive technology devices to veterans poststroke by Medicare and VA.

BACKGROUND: The increase in provision of assistive technology devices (ATDs) has spurred controversy over Medicare policy aimed at reducing cost-policy that forces social isolation and conflicts with legislation, facilitating participation for individuals with disabilities. In contrast, Department of Veterans Affairs (VA) policy does not limit provision of AT to "in home" use only but rather, states "all enrolled and some non-enrolled veterans are eligible for all needed prosthetics." OBJECTIVES: Examine ATD provision policy by comparing 2 systems, Medicare and VA. Empirically analyze differences in ATDs provided, cost, and duplication in provision. RESEARCH DESIGN: Retrospective study of VA databases, including VA Medicare data. SUBJECTS: A population based study of 12,0461 veterans post-stroke. MEASURES: Frequency of provision of ATDs by Health Care Common Procedural Code, purchase price, and capped rental payments. RESULTS: Of the poststroke veteran cohort, 39% received no AT, 56% received AT from the VA only, 1% received AT from Medicare only, and 3% received AT from both the VA and Medicare. Most ATDs were for activities of daily living, followed by walkers/canes/crutches. In specific ATD comparisons, VA costs were substantially lower than Medicare for purchased items and slightly lower than Medicare for capped rental payments. CONCLUSION: VA provides a broader variety of ATDs at a lesser cost than Medicare. Analyses of policy differences between VA and Medicare suggest VA policy is driven by veteran need whereas Medicare policy is driven at least in part, by containing costs that have skyrocketed as a result of fraudulent claims.

Demographic and clinical variation in Veterans Health Administration provision of assistive technology devices to veterans poststroke.

OBJECTIVES: To examine variation in provision of assistive technology (AT) devices and the extent to which such variation may be explained by patient characteristics or Veterans Health Administration (VHA) administrative region. DESIGN: Retrospective population-based study. SETTING: VHA. PARTICIPANTS: Veterans poststroke in fiscal years 2001 and 2002 (N=12,046). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURE: Provision of 8 categories of AT devices. RESULTS: There was considerable regional variation in provision of AT. For example, differences across administrative regions in the VHA ranged from 5.1 to 28.1 standard manual wheelchairs per 100 veterans poststroke. Using logistic regression, with only demographic variables as predictors of standard manual wheelchair provision, the c statistic was .62, and the pseudo R(2) was 2.5%. Adding disease severity increased the c statistic to .67 and the pseudo R(2) to 6.2%, and adding Veteran Integrated Network System further increased the c statistic to .72 and pseudo R(2) to 9.8%. CONCLUSIONS: Our research showed significant variation in the provision of AT devices to veterans poststroke, and it showed that patient characteristics accounted for only 6.2% of the variation. VHA administrative region and disability severity accounted for equivalent amounts of the variation. Our findings suggest the need for improvements in the process for providing AT and/or provider education concerning device provision.

Factors influencing decisions to admit patients to veterans affairs specialized rehabilitation units after lower-extremity amputation.

UNLABELLED: Bates BE, Kwong PL, Kurichi JE, Bidelspach DE, Reker DM, Maislin G, Xie D, Stineman M. Factors influencing decisions to admit patients to Veterans Affairs specialized rehabilitation units after lower-extremity amputation. OBJECTIVE: To understand patient- and facility-level characteristics that influence decisions to admit veterans to a specialized rehabilitation unit (SRU) after a lower-extremity amputation. DESIGN: Database study. SETTING: All Veterans Affairs Medical Centers (VAMCs). PARTICIPANTS: Veterans with lower-extremity amputation discharged from VAMCs between October 1, 2002, and September 30, 2004. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURE: Admission to an SRU. RESULTS: There were a total of 2922 veterans with lower-extremity amputations; 616 patients were admitted to an SRU, whereas 2306 received consultative rehabilitation services only. Patients admitted to an SRU waited longer to have their first rehabilitation assessment after surgery and had middle-range physical and cognitive disabilities. Patients who received consultative rehabilitation services only tended to have greater illness burden. They were more likely to have previous amputation complication, paralysis, or renal failure and either very severe or minimal physical and cognitive disabilities. CONCLUSIONS: The selection of veterans with new lower-extremity amputations for admission to an SRU appears clinically reasonable and based on the likelihood of successful outcomes.

The effectiveness of inpatient rehabilitation in the acute postoperative phase of care after transtibial or transfemoral amputation: study of an integrated health care delivery system.

OBJECTIVE: To compare outcomes between lower-extremity amputees who receive and do not receive acute postoperative inpatient rehabilitation within a large integrated health care delivery system. DESIGN: An observational study using multivariable propensity score risk adjustment to reduce treatment selection bias. SETTING: Data compiled from 9 administrative databases from Veterans Affairs Medical Centers. PARTICIPANTS: A national cohort of veterans (N=2673) who underwent transtibial or transfemoral amputation between October 1, 2002, and September 30, 2004. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: One-year cumulative survival, home discharge from the hospital, and prosthetic limb procurement within the first postoperative year. RESULTS: After reducing selection bias, patients who received acute postoperative inpatient rehabilitation compared to those with no evidence of inpatient rehabilitation had an increased likelihood of 1-year survival (odds ratio [OR]=1.51; 95% confidence interval [CI], 1.26-1.80) and home discharge (OR=2.58; 95% CI, 2.17-3.06). Prosthetic limb procurement did not differ significantly between groups. CONCLUSIONS: The receipt of rehabilitation in the acute postoperative inpatient period was associated with a greater likelihood of 1-year survival and home discharge from the hospital. Results support early postoperative inpatient rehabilitation following amputation.

Multiple system utilization and mortality for veterans with stroke.

BACKGROUND AND PURPOSE: Many Veteran Health Administration (VHA) enrollees receive health services outside the VHA system. However, limited information is available about poststroke utilization and mortality by veterans who used multiple sources of health care. This study assessed the likelihood of 12-month poststroke rehospitalization and mortality of veterans who used VHA only versus those who used multiple sources of care. METHODS: Our retrospective observational study examined veterans living in Florida and diagnosed with acute stroke. We categorized users into 4 groups: VHA-only, VHA-Medicare, VHA-Medicaid, and VHA-Medicare-Medicaid based on their use of each health care program. Logistic regression models were fitted for 12-month poststroke general rehospitalization, recurrent stroke readmission, and mortality, adjusting for sociodemographic and clinical factors. RESULTS: The sample consisted of 29% VHA-only users, 61% VHA-Medicare users, 3% VHA-Medicaid users, and 7% VHA-Medicare-Medicaid triple users. Compared with the VHA-only users, multiple system users were significantly more likely to be rehospitalized for any cause and for recurrent stroke 12-months postindex. Mortality outcomes depended on when the outcome was measured; at the index admission date, we found no significant difference in mortality across the user groups; at the index discharge date, the VHA-only users was less likely to die within the first 12 months than the users of the 2 dual groups (VHA-Medicare and VHA-Medicaid). CONCLUSIONS: Multiple health care source use was common among VHA enrollees with acute stroke in Florida. Multiple system users were more likely to be rehospitalized and the mortality outcomes were dependent on when the outcome was measured.

Clinical factors associated with prescription of a prosthetic limb in elderly veterans.

OBJECTIVES: To determine how advanced age influences prosthetic prescription. DESIGN: Retrospective cohort analysis with theory-driven logistic regression models. A Post Amputation Quality-of-Life (PAQ) framework of outcomes was proposed and empirically tested. SETTING: Veterans Affairs Medical Centers. PARTICIPANTS: Two thousand three hundred seventy-five veterans with lower extremity amputations discharged between October 1, 2002, and September 30, 2003. MEASUREMENTS: Prosthetic prescription within 1 year of amputation. RESULTS: Patients younger than 76 were 4.5 times as likely to receive a prescription compared to those aged 86 and older (odds ratio=4.51, 95% confidence interval=1.36-14.99) after controlling for sex, marital status, living circumstance before hospitalization, anatomical level, etiologies, comorbidities, medical acuity, and initial functional status. Patients admitted from extended care and patients with peripheral vascular disease, systemic sepsis, renal failure, congestive heart failure, psychoses, metastatic cancer, paralysis, or other neurological disorders were less likely to receive a prescription, as were patients who underwent procedures for acute central nervous system disorders, severe renal disease, or serious nutritional compromise. Veterans evaluated initially as more cognitively and physically able had higher likelihood of prosthetic prescription, and those with transtibial amputations had higher likelihood of prosthetic prescription than those with transfemoral amputations. CONCLUSION: Amputees aged 75 and older are less likely to receive a prosthetic limb prescription than younger individuals, even after controlling for comorbidities and functional status. Findings support the PAQ framework, in which contexts, etiologies, anatomic level, comorbidities, medical acuity, and initial function are determinants of outcome. Medical and functional conditions that adversely affect level of energy, ability to move independently, or ability to exercise judgment reduce the likelihood of prosthetic prescription.

Assessing and using comorbidity measures in elderly veterans with lower extremity amputations.

BACKGROUND: Understanding comorbidity prevalence and the effects of comorbidities in older veterans with lower extremity amputations may aid in assessing patient outcomes, resource use, and facility-level quality of care. OBJECTIVES: To determine the degree to which adding outpatient to inpatient administrative data sources yields higher comorbidity prevalence estimates and improved explanatory power of models predicting 1-year mortality and to compare the Charlson/Deyo and Elixhauser comorbidity measures. METHODS: A retrospective cohort study applying frequencies, cross-tabulations, and logistic regression models was conducted, including data from 2,375 veterans with lower extremity amputations. Comorbidity prevalence according to the Charlson/Deyo and Elixhauser measures, 1-year mortality rates, and standardized mortality ratios (SMRs) were analyzed. RESULTS: Comorbidity prevalence estimates increased sharply for both the Charlson/Deyo and Elixhauser measures with the addition of data from multiple settings. The Elixhauser compared to the Charlson/Deyo generally yielded higher estimates but did not improve explanatory power for mortality. Modeling expected versus actual deaths produced varying SMRs across geographic regions but was not dependent on which measure or data sources were used. CONCLUSIONS: Merging outpatient with inpatient data may reduce the under coding of comorbidities but does not enhance mortality prediction. Compared to the Charlson/Deyo, the Elixhauser has a more complete coding scheme for comorbid conditions, such as diabetes mellitus and peripheral vascular disease, important to addressing lower extremity amputation etiology.

Development of an integrated stroke outcomes database within Veterans Health Administration.

A fundamental goal of the Rehabilitation Outcomes Research Center of Excellence is to improve care and outcomes for veterans with rehabilitation needs. To achieve this goal, the Center's primary objective is increasing research capacity. The Integrated Stroke Outcomes Database is a collection of Veterans Health Administration (VHA) clinical and administrative data containing patient information on a cohort of stroke patients found in the Functional Status Outcomes Database (FSOD), National Patient Care Database (NPCD), and other VHA sources. Clinical and administrative data were abstracted from several VHA data sources and linked to form an integrated outcomes database. A primary cohort of stroke patients treated during fiscal year (FY) 2001 was identified from the FSOD. Matching data from the NPCD, Decision Support System, Health Economics Resource Center, and the National Veterans Survey were obtained, merged, and reported in brief. This integrated database structure will provide valuable support to enhance the VHA capacity to perform stroke rehabilitation research.

Evaluation of proxy responses to the Stroke Impact Scale.

BACKGROUND AND PURPOSE: The purposes of this study were to compare proxy-patient responses on each domain of the Stroke Impact Scale (SIS) and the SIS-16, estimate the bias, and evaluate the validity of proxy scores. METHODS: Two hundred eighty-seven patient and proxy pairs from the Kansas City Stroke Registry participated in the study. All patients were assessed in their home or nursing facility between 90 and 120 days after stroke with the use of the modified Rankin Scale Motricity Index (strength), Barthel Index (activities of daily living), Lawton assessment (instrumental activities of daily living), Folstein Mini-Mental State Examination (cognition), and the SIS. Eligible proxies were individuals who were aged > or =18 years, had known the patient for at least 1 year, and saw the patient at least once each week. All proxy interviews were conducted within 7 days of (before or after) the patient's interview. RESULTS: Three hundred seventy-seven patients from the Kansas City Stroke Registry were eligible for the study. Seventy-seven patients or proxies refused participation. Thirteen patients of the consenting patient-proxy pairs were too aphasic or cognitively impaired to complete the interviews and were dropped from the study. Proxies scored patients as more severely affected than patients scored themselves on the SIS-16 and in 7 of 8 domains of the full SIS (5 were statistically significant at alpha=0.05). The proxy bias toward overrating the severity of the patient's condition tended to increase as the severity of the stroke increased. However, the magnitude of the biases between patient and proxy means, as measured by effect size, was small (range, -0.1 to 0.4). The strength of the agreement, as measured by intraclass correlation coefficients, between proxy and patient ranged from 0.50 to 0.83. Agreement was best for the observable physical domains. Both patient and proxy scores in all domains were significantly different across Rankin categories. Concurrent validity for both patient and proxy correlations with the Folstein Mini-Mental State Examination, Barthel Index, Lawton instrumental activities of daily living, and Motricity Index was good to excellent (range, 0.37 to 0.78). CONCLUSIONS: Proxies provide valid information for assessment of stroke outcomes. There are significant differences between patient and proxy reporting on SIS domains and the SIS-16. However, the observed biases are small and not clinically meaningful.

Adherence to postacute rehabilitation guidelines is associated with functional recovery in stroke.

BACKGROUND AND PURPOSE: The purpose of this study was to determine if compliance with poststroke rehabilitation guidelines was associated with better functional outcomes. METHODS: An inception cohort of 288 stroke patients in 11 Department of Veteran Affairs Medical Centers hospitalized between January 1998 and March 1999 were followed prospectively for 6 months. Data were abstracted from medical records and telephone interviews. The primary study outcome was the Functional Independence Motor Score (FIM). Secondary outcomes included Instrumental Activities of Daily Living (IADL), SF-36 physical functioning, and the Stroke Impact Scale (SIS). Acute and postacute rehabilitation guideline compliance scores (range 0 to 100) were derived from an algorithm. All outcomes were adjusted for case-mix. RESULTS: Average compliance scores in acute and postacute care settings were 68.2% (SD 14) and 69.5% (SD 14.4), respectively. After case-mix adjustment, level of compliance with postacute rehabilitation guidelines was significantly associated with FIM motor, IADL, and the SIS physical domain scores. SF-36 physical function was not associated with guideline compliance. Level of compliance with rehabilitation guidelines in acute settings was unrelated to any of the outcome measures. CONCLUSION: Greater levels of adherence to postacute stroke rehabilitation guidelines were associated with improved patient outcomes. Compliance with guidelines may be viewed as a quality-of-care indicator with which to evaluate new organizational and funding changes involving postacute stroke rehabilitation.

Survival analysis in amputees based on physical independence grade achievement.

BACKGROUND: Survival implications of achieving different grades of physical independence after lower extremity amputation are unknown. OBJECTIVES: To identify thresholds of physical independence achievement associated with improved 6-month survival and to identify and compare other risk factors after removing the influence of the grade achieved. DESIGN: Data were combined from 8 administrative databases. Grade was measured on the basis of 13 individual self-care and mobility activities measured at inpatient rehabilitation discharge. SETTING: Ninety-nine US Department of Veterans Affairs Medical Centers. PATIENTS: Retrospective longitudinal cohort study of 2616 veterans who underwent lower extremity amputation and subsequent inpatient rehabilitation between October 1, 2002, and September 30, 2004. MAIN OUTCOME MEASURE: Cumulative 6-month survival after rehabilitation discharge. RESULTS: The 6-month survival rate (95% confidence interval [CI]) for those at grade 1 (total assistance) was 73.5% (70.5%-76.2%). The achievement of grade 2 (maximal assistance) led to the largest incremental improvement in prognosis with survival increasing to 91.1% (95% CI, 85.6%-94.5%). In amputees who remained at grade 1, the 30-day hazards ratio for survival compared with grade 6 (independent) was 43.9 (95% CI, 10.8-278.2), sharply decreasing with time. Whereas metastatic cancer and hemodialysis remained significantly associated with reduced survival (both P < or = .001), anatomical amputation level was not significant when rehabilitation discharge grade and other diagnostic conditions were considered. CONCLUSIONS: Even a small improvement to grade 2 in the most severely impaired amputees resulted in better 6-month survival. Health care systems must plan appropriate interdisciplinary treatment strategies for both medical and functional issues after amputation.

Factors associated with VHA costs of care for first 12 months after first stroke.

We examined the use patterns and costs of care for a validated stroke cohort (n = 172) from 13 Department of Veterans Affairs (VA) medical centers 1 year poststroke. Decision Support System (DSS) cost and use data (inpatient and outpatient) are profiled. We provide preliminary information about the costs associated with inpatient and outpatient care and explore the relationship between the cost of stroke care, location of service (inpatient and outpatient), and patient functional outcomes. Data on both clinical and sociodemographic characteristics were abstracted from the medical record and merged with VA DSS cost data from each patient's first year poststroke. Descriptive statistics assessed patterns in treatment costs. We found that DSS costs varied as expected across key indicators, including function, health status, discharge location, and the number of comorbidities. These findings provide broad support for the use of DSS cost data in studies of VA stroke care.

Distribution and cost of wheelchairs and scooters provided by Veterans Health Administration.

During fiscal years 2000 and 2001, the Veterans Health Administration provided veterans with more than 131,000 wheelchairs and scooters at a cost of $109 million. This national study is the first to investigate Veterans Health Administration costs in providing wheelchairs and scooters and to compare regional prescription patterns. With a retrospective design, we used descriptive methods to analyze fiscal years 2000 and 2001 National Prosthetics Patient Database data (cleaned data set of 113,724 records). Wheelchairs were categorized by function, weight, and adjustability options for meeting individual needs (e.g., axle position, camber, position of wheels, tilt, and recline options). Results displayed a cost distribution that was negatively skewed by low-cost accessories coded as wheelchairs. Of the standard manual wheelchairs, 3.5% could be considered beyond the customary cost. Regionally, 71% to 86% of all wheelchairs provided were manual wheelchairs, 5% to 11% were power wheelchairs, and 5% to 20% were scooters. The considerable variation found in the types of wheelchairs and scooters provided across Veterans Integrated Service Networks may indicate a need for evidence-based prescription guidelines and clinician training in wheeled-mobility technologies.

Risk factors associated with mortality in veteran population following transtibial or transfemoral amputation.

This study explored medical conditions associated with mortality among veterans following transfemoral amputation, transtibial amputation, or hip disarticulation. We applied logistic regression models to identify clinical factors associated with mortality postoperatively. The participants included patients with lower-limb amputations (n = 2,375) who were discharged from Veterans Health Administration hospitals between October 1, 2002, and September 30, 2003. Most (98.9%) were male. We measured cumulative in-hospital, 3-month, and 1-year mortality. The results were 180 in-hospital deaths, 368 by 3 months, and 634 by the 1-year postsurgical amputation date. Those who had perioperative systemic sepsis (odds ratio = 4.28, 95% confidence interval = 2.87-6.39) had more than a fourfold increased likelihood of in-hospital mortality. Congestive heart failure, renal failure, and liver disease were significantly associated with mortality at all time periods. Metastatic cancer was associated only at 3 months and 1 year. We concluded that high medical complexity and mortality rates attest to the need for careful medical oversight during the postacute rehabilitation period.

Demographic characteristics of veterans who received wheelchairs and scooters from Veterans Health Administration.

Little is known about the reasoning process clinicians use when prescribing wheeled mobility equipment (WME) or about the outcomes of this process, i.e., how many devices are prescribed, to whom, how often, and at what cost. This study characterized veterans who received WME from the Veterans Health Administration. We analyzed variance in wheelchair provision based on sex, race/ethnicity, diagnosis, and age. Three years of data from the National Prosthetics Patient Database and the National Patient Care Database were merged, yielding more than 77,000 observations per fiscal year. Logistic regression analysis revealed associations between WME provision and age, sex, and race/ethnicity, when analysis was controlled for diagnosis and number of comorbidities. Hispanics (odds ratio [OR] = 1.864), African Americans (OR = 1.360), and American Indians/Asians (OR = 1.585) were more likely than Caucasians to receive standard wheelchairs. Hispanics (OR = 0.4), African Americans (OR = 0.7), and American Indians/Asians (OR = 0.4) were less likely than Caucasians to receive scooters.

Race/ethnicity: who is counting what?

Misclassification of race and ethnicity in administrative data may produce misleading results if it is overlooked or ignored. In this study, we examined the racial/ethnic classifications of 1,084 veterans with stroke in Florida who received inpatient and outpatient services within the Department of Veterans Affairs (VA) healthcare system and who were also eligible for Medicare between 2000 and 2001. We compared the reliability of racial/ethnic classifications between VA inpatient data, VA outpatient data, and Medicare data. Our results showed that (1) the rate of unknown racial/ethnic classification in VA outpatient and inpatient data was high, (2) minimizing the unknowns by substituting known values from other data when available would greatly enhance the overall and individual classification reliability, (3) black and white classifications in the VA data had stronger agreement with Medicare data, and (4) Medicare data may under-represent Hispanic patients.

Racial differences in use of colonoscopy, sigmoidoscopy, and barium enema in Medicare beneficiaries.

Colorectal cancer is often diagnosed at a later stage in blacks. We wanted to know if racial differences existed in the use of tests for detection of colorectal cancer. A 5% random sample was obtained of all Medicare beneficiaries with Part B coverage, aged 65 years and older and classified as white or black race. The numbers of colonoscopies, flexible sigmoidoscopies, and barium enemas were determined from the Physician/Supplier file. Blacks were 18% less likely to receive colonoscopy and 39% less likely to receive flexible sigmoidoscopy after controlling for age, sex, income, and access to care in a multivariable logistic regression model. Barium enema was not significantly different between the races. Black men had 25% lower use of colonoscopy and 50% decreased use of flexible sigmoidoscopy. Blacks receive less colonoscopy and flexible sigmoidoscopy than whites. Black men are particularly vulnerable to the under-use of these tests.

Co-morbidity adjustment for functional outcomes in community-dwelling older adults.

OBJECTIVE: To characterize relationships between self-reported co-morbidity and functional outcomes in community-dwelling older adults, and to assess whether the impact of co-morbidity persists even after adjustment for baseline functional status. DESIGN: Prospective observational study. We examined associations between self-reported co-morbidity at baseline and functional outcomes at one year, with and without adjustment for baseline functional status. SETTING: Outpatient clinics at a managed care and a Veterans Affairs site. SUBJECTS: Four hundred and fifty-seven community-dwelling older adults representing a broad spectrum of overall health status. MAIN OUTCOME MEASURES: (a) New basic ADL (activities of daily living) problem during follow-up; (b) 10-point decline in the physical function index of the MOS-36 (MOS-PFI). RESULTS: Co-morbidity was associated with adverse functional outcomes in bivariable analyses. After adjustment for age and baseline functional status, an accumulated co-morbidity score provided additional explanatory power for predicting new ADL problems; odds ratios were 2.30 (1.09, 5.09) and 2.96 (1.48, 6.25) for 2 and > or = 3 affected co-morbidity domains, respectively. The impact of baseline status was also important; odds ratios for new ADL problems were 4.77 (2.68, 8.81) when at least one instrumental activity of daily living (IADL) problem was present at baseline, and 15.6 (8.05, 31.3) when at least one basic ADL problem was present at baseline. CONCLUSIONS: Accumulated self-reported co-morbidity has significant negative effects on function at one year; these effects are attenuated but not eliminated by adjustment for baseline status. Co-morbidity adjustment is probably an important design element in clinical research focused on functional outcomes in older adults.

Why ethnic designation matters for stroke rehabilitation: comparing VA administrative data and clinical records.

Using existing administrative data to look at issues of ethnic disparities in rehabilitation-related outcomes may lead to misleading results. Problems can emerge from apparently small issues of reliability that are magnified by reclassification of ethnic designation and missing data in complete-subject analyses. We compared the reliability of ethnic assignment in Department of Veterans Affairs (VA) medical rehabilitation records for stroke patients with administrative records; reclassified the racial identifier from the administrative data in two ways; and examined the different sources of ethnic information in relation to severity, length-of-stay, disability assessment, and discharge disposition. Our results show how small changes increase the potential for Type II error when describing ethnic differences in outcomes or using ethnicity as a predictor with dichotomous response variables. We discuss our results with reference to the literature on ethnic classification and underline the importance of initiatives for improved data collection on ethnicity in VA data sources and in rehabilitation research.