Nancy D. Harada

An evaluation of three self-report physical activity instruments for older adults

PURPOSE To assess the known-groups and construct validity of measures from the CHAMPS Physical Activity Questionnaire, Physical Activity Survey for the Elderly (PASE), and the Yale Physical Activity Survey (YPAS). METHODS The three questionnaires were administered to a convenience sample of older adults (N = 87) recruited from community centers and retirement homes. Validation measures included the SF-36 measures of physical functioning, general health, mental health, and pain; body mass index; performance-based tests of lower body functioning and endurance; and Mini-Logger activity monitor data from ankle and waist sensors. Validity was estimated by testing hypotheses about associations between physical activity and validation measures. RESULTS As hypothesized, differences in activity levels on all measures were found between older adults in retirement homes (less active) and community centers (more active) (P-values < 0.0001). Correlations of physical activity measures with performance-based measures ranged from 0.44 to 0.68, conforming to hypotheses; hypotheses regarding associations with the SF-36 measures were also confirmed. Body mass index was not correlated with any of the physical activity measures, contrary to hypotheses. Correlations of physical activity measures with Mini-Logger counts ranged from 0.36 to 0.59 (ankle) and 0.42 to 0.61 (waist) as hypothesized. Correlations among the measures from the three instruments ranged from 0.58 to 0.68. CONCLUSIONS The PASE, YPAS, and CHAMPS each demonstrated acceptable validity, as all measures met nearly all hypotheses. Higher validity coefficients were found for subgroups (men, 65-74 yr, retirement home), suggesting that these instruments may perform better for certain segments of the older adult population.

Mobility-related function in older adults : assessment with a 6-minute walk test

OBJECTIVE To determine the usefulness of the 6-minute walk test as an integrated measure of mobility in older adults. DESIGN Observational study. SETTING Community centers and retirement homes in the Los Angeles area. PATIENTS Eighty-six older adults without significant disease. INTERVENTIONS None. MAIN OUTCOME MEASURES Assessments included the 6-minute walk, chair stands, standing balance, gait speed, body mass index, and self-reported physical functioning and general health perceptions. RESULTS One-week test-retest reliability of the 6-minute walk was .95. As hypothesized, the 6-minute walk distance was significantly greater for active than for inactive older adults (p < .0001), moderately correlated with chair stands (r = .67), standing balance (r = .52), and gait speed (r = -.73). It had a low correlation with body mass index (r = -.07). The correlation of the 6-minute walk with self-reported physical functioning was .55, and its correlation with general health perceptions was .39. Self-report and performance measures explained 69% of the variance in 6-minute walk scores. CONCLUSIONS The 6-minute walk test is reliable and is valid in relation to the performance and self-reported indicators of physical functioning tested in this study. It could serve as a useful integrated measure of mobility.

Functional status outcomes in rehabilitation. Implications for prospective payment.

Previous studies have demonstrated that functional status is a significant predictor of resource utilization for rehabilitation patients. Before implementing a prospective payment system (PPS) for rehabilitation, it is important to first: 1) develop an underlying conceptual framework of rehabilitation resource use; and 2) understand how the role of functional status may vary by rehabilitation condition. In this study, a theoretical model of rehabilitation is presented that proposes relationships between patient and provider characteristics, rehabilitation treatment, costs, and clinical outcomes of rehabilitation. Also presented are regression analyses based on this model for a key outcome of rehabilitation, change in functional status, for nine rehabilitation conditions using variables that minimize adverse incentives by providers in selecting patients for admission to rehabilitation. The change-in-functional-status model explained the most variance for back injury, cardiopulmonary, and arthritis, and less variance for stroke, spinal cord injury, and neurologic impairment. The significant predictors of change in functional status varied by condition. Results support the use of functional status measurements in a PPS for rehabilitation services, the need to refine the measurement of functional status, and the use of condition-specific activities of daily living (ADL) items to include in summary indices.

Veteran identity and race/ethnicity: Influences on VA outpatient care utilization

Background. “Veteran identity” is defined as veterans’ self-concept that derives from his/her military experience within a sociohistorical context. Veteran identity may vary by race/ethnicity because the sociohistorical context of the military experience varies by race. Objectives. To explore veteran identity and how it varies by race/ethnicity, and to identify aspects of veteran identity that significantly influence preferences for, and use of, VA outpatient care. Research Design. Focus groups were conducted at community sites to explore concepts related to veteran identity, race/ethnicity, military experience, and health services use. The focus groups informed the development of a telephone survey, which was administered to veterans of four racial/ethnic groups in Southern California and Southern Nevada. Subjects. One hundred seventy-eight veterans participated in the focus groups, and 3,227 veterans completed the telephone survey. Measures. Dependent variables include: (1) preference for VA health services, (2) VA-only outpatient use, (3) Any VA outpatient use, and (4) number of outpatient visits within the previous 12 months. Independent variables include veteran identity, sociodemographic, and health-related characteristics. Results. All veteran identity variables were significantly associated with race/ethnicity. Race/ethnicity, eg, being black or Hispanic, in addition to veteran identity factors, significantly influenced preferences for VA outpatient care. Veteran identity factors, however, had less influence on VA outpatient service utilization than socioeconomic factors. Conclusions. Minority veterans who highly identify with their veteran status may prefer the VA to other systems of care. Factors associated with veteran identity may be useful for incorporation into interventions to improve access to VA care.

Time Since Immigration and Health Services Utilization of Korean‐American Older Adults Living in Los Angeles County

The aim of this study was to characterize ambulatory healthcare utilization of older Korean Americans and its association with length of time since immigration. It was hypothesized that older Korean Americans who were recent immigrants would use outpatient physician visits less often than early immigrants. The data are from the 2000 Korean‐American Health Survey, which assessed the health status and medical needs of Korean Americans living in Los Angeles County. The dependent variable was the number of visits to a physician for check‐up or consultation. Multivariate regression modeling was used to assess the influence of length of time since immigration on the dependent variable controlling for predisposing, enabling, and need variables for a sample of 208 Koreans Americans aged 65 and older. Results indicated that high school education in Korea and health insurance status were significant predictors of number of visits to a physician during the previous year (P<.05). The main variable of interest, the number of years living in the United States, approached significance at P=.09. It was concluded that enabling variables such as education and health insurance significantly influenced use of healthcare services in the older Korean‐American population. The lack of studies regarding older minority populations and their access to healthcare further highlight theneed not only to characterize the access of these often‐vulnerable populations, but also to generate interest for further studies.

Racial/ethnic variations in veterans' ambulatory care use.

OBJECTIVES We assessed racial/ethnic variations in patterns of ambulatory care use among Department of Veterans Affairs (VA) health care-eligible veterans to determine if racial/ethnic differences in health care use persist in equal-access systems. METHODS We surveyed 3227 male veterans about their health and ambulatory care use. RESULTS Thirty-eight percent of respondents had not had a health care visit in the previous 12 months. Black (odds ratio [OR] = 0.5), Hispanic (OR = 0.4), and Asian/Pacific Islander veterans (OR=0.4) were less likely than White veterans to report any ambulatory care use. Alternately, Whites (OR=2.2) were more likely than other groups to report ambulatory care use. Being White was a greater predictor of health care use than was having fair or poor health (OR=1.4) or functional limitations (OR=1.5). In non-VA settings, racial/ethnic minorities were less likely to have a usual provider of health care. There was no VA racial/ethnic variation in this parameter. CONCLUSIONS Racial/ethnic disparities in health and health care use are present among VA health care-eligible veterans. Although the VA plays an important role in health care delivery to ethnic minority veterans, barriers to VA ambulatory care use and additional facilitators for reducing unmet need still need to be investigated.

Development of a Culturally Sensitive Educational Intervention Program to Reduce the High Incidence of Tuberculosis Among Foreign-Born Vietnamese

Objective. In Los Angeles County and Orange County 98% of Asians with tuberculosis (TB) were foreign born; newly arrived Vietnamese immigrants had the highest TB risk: i.e. > 100 times higher than that of the USA. The study objective was to find ways to reduce the high incidence of tuberculosis among the Vietnamese by: (1) identifying and understanding the cultural health beliefs and barriers among the Vietnamese population of Orange County California; and (2) developing a partnership between UCLA/VA/RAND MEDTEP key Vietnamese community-based organizations and community leaders in Orange County to develop and implement a comprehensive culturally sensitive educational intervention program. Design. Vietnamese residing in Orange County were recruited to obtain qualitative and quantitative data in 1998 and 1999 respectively. The study design included focus groups in-depth interviews and community surveys. Data were collected via qualitative reports computer-assisted random telephone interviews and self-administered questionnaires. Results. A conceptual schema was identified within the Vietnamese health belief system that recognized two different forms of tuberculosis: non-infectious psychological and infectious physical tuberculosis. It was possible to engage community organizations in developing programs to combat TB in the Vietnamese population. Conclusion. The Health beliefs of Vietnamese will be important considerations in developing a culturally sensitive educational intervention program to service this at-risk population.

The Health and Functional Status of US Veterans Aged 65+: Implications for VA Health Programs Serving an Elderly, Diverse Veteran Population:

As the US population is aging, so too is the US veteran population. Chief among the challenges facing the Department of Veterans Affairs (VA) is developing health programs and services that mesh with the needs of an aging veteran population and therefore improve the health status of elderly veterans. Meeting this challenge requires an understanding of the health needs of the older veteran population, including health disparities that exist across racial ethnic populations. This study examines the selfrated health and functioning of a national sample of veterans aged 65+ participating in the National Survey of Veterans. The results show that over one half of elderly veterans report difficulty in functioning and rate their health status as fair or poor. Additionally, elderly African American and Hispanic veterans report worse health than non-Hispanic white veterans across the majority of health indicators. Given the health profile of older veterans found in this study, it would seem necessary that programs serving older veterans be adept at the ongoing medical management of chronic disease and the provision of long-term care services.

Feasibility study of home telerehabilitation for physically inactive veterans

The aim of this study was to develop a system for and determine the feasibility of monitoring home exercise for physically inactive older adults using a Health Buddy (HB) text messaging device (Robert Bosch Healthcare; Palo Alto, California). Questions and messages related to exercise adherence are displayed on the HB screen and participants choose a response by pressing the corresponding button on the device. Responses are transmitted through a landline connection and high-risk responses are highlighted by the system for follow-up. We developed the questions and messages based on input from patient and clinician focus groups. We evaluated feasibility by administering the intervention to inpatient and outpatient adults aged 60 or older. We gave participants a choice of exercise monitoring by HB (n = 20) or telephone (n = 18). The results showed that home exercise monitoring by HB and telephone is safe, as evidenced by low adverse event rates. We saw a decline in exercise adherence rates to both the HB and telephone after 8 weeks, although adherence was better for HB than telephone. Taken together, the results demonstrate the feasibility of using text messaging to monitor home exercise adherence in physically inactive older adults.

Defining Core Issues in Utilizing Information Technology to Improve Access: Evaluation and Research Agenda

The Department of Veterans Affairs (VA) has been at the vanguard of information technology (IT) and use of comprehensive electronic health records. Despite the widespread use of health IT in the VA, there are still a variety of key questions that need to be answered in order to maximize the utility of IT to improve patient access to quality services. This paper summarizes the potential of IT to enhance healthcare access, key gaps in current evidence linking IT and access, and methodologic challenges for related research. We also highlight four key issues to be addressed when implementing and evaluating the impact of IT interventions on improving access to quality care: 1) Understanding broader needs/perceptions of the Veteran population and their caregivers regarding use of IT to access healthcare services and related information. 2) Understanding individual provider/clinician needs/perceptions regarding use of IT for patient access to healthcare. 3) System/Organizational issues within the VA and other organizations related to the use of IT to improve access. 4) IT integration and information flow with non-VA entities. While the VA is used as an example, the issues are salient for healthcare systems that are beginning to take advantage of IT solutions.