Anita L. Stewart

THE MOS SOCIAL SUPPORT SURVEY

This paper describes the development and evaluation of a brief, multidimensional, self-administered, social support survey that was developed for patients in the Medical Outcomes Study (MOS), a two-year study of patients with chronic conditions. This survey was designed to be comprehensive in terms of recent thinking about the various dimensions of social support. In addition, it was designed to be distinct from other related measures. We present a summary of the major conceptual issues considered when choosing items for the social support battery, describe the items, and present findings based on data from 2987 patients (ages 18 and older). Multitrait scaling analyses supported the dimensionality of four functional support scales (emotional/informational, tangible, affectionate, and positive social interaction) and the construction of an overall functional social support index. These support measures are distinct from structural measures of social support and from related health measures. They are reliable (all Alphas greater than 0.91), and are fairly stable over time. Selected construct validity hypotheses were supported.

EVIDENCE SUGGESTING THAT A CHRONIC DISEASE SELF-MANAGEMENT PROGRAM CAN IMPROVE HEALTH STATUS WHILE REDUCING HOSPITALIZATION: A RANDOMIZED TRIAL

OBJECTIVES This study evaluated the effectiveness (changes in health behaviors, health status, and health service utilization) of a self-management program for chronic disease designed for use with a heterogeneous group of chronic disease patients. It also explored the differential effectiveness of the intervention for subjects with specific diseases and comorbidities. METHODS The study was a six-month randomized, controlled trial at community-based sites comparing treatment subjects with wait-list control subjects. Participants were 952 patients 40 years of age or older with a physician-confirmed diagnosis of heart disease, lung disease, stroke, or arthritis. Health behaviors, health status, and health service utilization, as determined by mailed, self-administered questionnaires, were measured. RESULTS Treatment subjects, when compared with control subjects, demonstrated improvements at 6 months in weekly minutes of exercise, frequency of cognitive symptom management, communication with physicians, self-reported health, health distress, fatigue, disability, and social/role activities limitations. They also had fewer hospitalizations and days in the hospital. No differences were found in pain/physical discomfort, shortness of breath, or psychological well-being. CONCLUSIONS An intervention designed specifically to meet the needs of a heterogeneous group of chronic disease patients, including those with comorbid conditions, was feasible and beneficial beyond usual care in terms of improved health behaviors and health status. It also resulted in fewer hospitalizations and days of hospitalization.

Chronic disease self-management program: 2-year health status and health care utilization outcomes.

Objectives.To assess the 1- and 2-year health status, health care utilization and self-efficacy outcomes for the Chronic Disease Self-Management Program (CDSMP). The major hypothesis is that during the 2-year period CDSMP participants will experience improvements or less deterioration than expected in health status and reductions in health care utilization. Design.Longitudinal design as follow-up to a randomized trial. Setting.Community. Participants.Eight hundred thirty-one participants 40 years and older with heart disease, lung disease, stroke, or arthritis participated in the CDSMP. At 1- and 2-year intervals respectively 82% and 76% of eligible participants completed data. Main Outcome Measures. Health status (self-rated health, disability, social/role activities limitations, energy/fatigue, and health distress), health care utilization (ER/outpatient visits, times hospitalized, and days in hospital), and perceived self-efficacy were measured. Main Results. Compared with baseline for each of the 2 years, ER/outpatient visits and health distress were reduced (P <0.05). Self-efficacy improved (P <0.05). The rate of increase is that which is expected in 1 year. There were no other significant changes. Conclusions.A low-cost program for promoting health self-management can improve elements of health status while reducing health care costs in populations with diverse chronic diseases.

CHAMPS Physical Activity Questionnaire for Older Adults: outcomes for interventions.

PURPOSE To evaluate effectively interventions to increase physical activity among older persons, reliable and valid measures of physical activity are required that can also detect the expected types of physical activity changes in this population. This paper describes a self-report physical activity questionnaire for older men and women, developed to evaluate the outcomes of the Community Healthy Activities Model Program for Seniors (CHAMPS), an intervention to increase physical activity. METHODS The questionnaire assesses weekly frequency and duration of various physical activities typically undertaken by older adults. We estimated caloric expenditure/wk expended in physical activity and created a summary frequency/wk measure. We calculated measures of each of these for: 1) activities of at least moderate intensity (MET value >/= 3.0); and 2) all specified physical activities, including those of light intensity. Six-month stability was estimated on participants not likely to change (assessment-only control group, physically active cohort). Several tests of construct validity were conducted, and sensitivity to change was analyzed based on response to the CHAMPS intervention. RESULTS The sample (N = 249) comprised underactive persons (N = 173 from the CHAMPS trial) and active persons (N = 76). The sample was aged 65-90 yr (mean = 74, SD = 6); 64% were women, and 9% were minorities. Six-month stability ranged from 0.58 to 0.67, using intraclass correlation coefficients. Nearly all construct validity hypotheses were confirmed, though correlations were modest. All measures were sensitive to change (P < or = 0.01), with small to moderate effect sizes (0.38-0.64). CONCLUSIONS The CHAMPS measure may be useful for evaluating the effectiveness of programs aimed at increasing levels of physical activity in older adults.

Loss of Independence in Activities of Daily Living in Older Adults Hospitalized with Medical Illnesses: Increased Vulnerability with Age

OBJECTIVES: To describe the changes in activities of daily living (ADL) function occurring before and after hospital admission in older people hospitalized with medical illness and to assess the effect of age on loss of ADL function.

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.

Self-reports of health care utilization compared to provider records

This study compares self-reports of medical utilization with provider records. As part of a chronic disease self-management intervention study, patients completed self-reports of their last six months of health care utilization. A subgroup of patients was selected from the larger study and their self-reports of utilization were compared to computerized utilization records. Consistent with earlier studies, patients tended to report less physician utilization than was recorded in the computerized provider records. However, they also tended to report slightly more emergency room visits than were reported in the computerized utilization records. There was no association between demographic or health variables and the tendency toward discrepancy between self-report and computerized utilization record reports. However, there was a tendency for the discrepancy to increase as the amount of record utilization increased. Thus, the likelihood of bias caused by differing demographic factors is low, but researchers should take into account that underreporting occurs and is likely to increase as utilization increases.

The concept of quality of life of dying persons in the context of health care.

Considerable research has addressed quality of life and quality of care; however, it has not addressed adequately the experiences of patients and their families at the end of life. Health care may have a greater effect on quality of life during the dying process than it normally does. Building on research and expert review, a conceptual framework is presented that specifies and integrates quality of life and quality of health care indicators. Five main concepts include patient/family context, structure of care, process of care, satisfaction with care, and quality and length of life. Patient and family perspectives are considered. The framework emphasizes quality of life, thus detailed definitions of each quality of life domain are provided. The goal is to facilitate development of a comprehensive set of measures to describe the quality of life of dying persons and evaluate the care they receive, to be used to improve end-of-life care.

Long-term functioning and well-being outcomes associated with physical activity and exercise in patients with chronic conditions in the medical outcomes study

This study was carried out to determine whether levels of physical activity of patients with various chronic diseases are associated with subsequent functioning and well-being. It was an observational 2-year longitudinal design. The setting was offices of medical and mental health practices within health maintenance organizations, large multispecialty groups, and solo practices or small single-specialty group practices in three U.S. cities. Included in the study were 1758 adult patients with one or more of the following: diabetes, hypertension, congestive heart failure, recent myocardial infarction, depressive symptoms, or current depressive disorder. Outcome measures included physical, role, and functioning; energy/fatigue; pain intensity; sleep problems; depressed affect, anxiety, positive affect, and overall psychological distress/well-being; health distress; and current health perceptions. Cross-sectional (base-line), 2-year endpoint, and change score relationships were evaluated between baseline levels of physical activity and each outcome, controlling for chronic conditions, comorbidity, smoking, alcohol use, overweight, self-reported adherence, and other patient and study characteristics. Higher baseline levels of exercise were uniquely associated with better functioning and well-being at baseline and 2 years later for some measures. The magnitude of the differences varied by disease group, but tended to be between 0.17 and 0.39 of the baseline SD. Greater levels of exercise are associated with feeling and functioning better for patients with chronic conditions over a 2-year period, suggesting that this is a fruitful area for further study using controlled interventions.