Biomedical subjects

A L Siu

Publications and source records attributed to A L Siu.

At least 37 records · Page 2Linked to original sources

PubMed1996

Physician implementation of and patient adherence to recommendations from comprehensive geriatric assessment.

PURPOSE: The goals of this study were to develop and determine the feasibility of interventions designed to increase both primary care physician implementation of and patient adherence to recommendations from ambulatory-based consultative comprehensive geriatric assessment (CGA), and to identify sociodemographic and intervention-related predictors of physician and patient adherence. PATIENTS AND METHODS: One hundred thirty-nine community-dwelling older persons who failed a screen for functional impairment, depressive symptoms, falls, or urinary incontinence received outpatient CGA consultation. These patients and the 115 physicians who provided primary care for them received one of three adherence interventions, each of which had a physician education component and a patient education and empowerment component. Recommendations were classified as physician-initiated or self-care and as "major" or "minor"; one was deemed "most important". Adherence rates were determined on the basis of face-to-face interviews with patients. RESULTS: Based on 528 recommendations for 139 subjects, physician implementation of "most important" recommendations was 83% and of major recommendations was 78.5%. Patient adherence with physician-initiated "most important" and "major" recommendations were 81.8% and 78.8% respectively. In multivariate models, only the status of the recommendation of "most important" (odds ratio 2.4, 95% CI [confidence interval] 1.3 to 4.5) and health maintenance organization (HMO) status of the patient (odds ratio 2.1, 95% CI 1.3 to 3.6) remained significant in predicting physician implementation. The logistic model predicting patient adherence to physician-initiated recommendations included male patient gender (odds ratio 3.1, 95% CI 1.3 to 7.0), the status of the recommendation of "most important" (odds ratio 1.9, 95% CI 1.0 to 3.8), total number of recommendations (odds ratio 0.7, 95% CI 0.5 to 0.9), and total number of problems identified by CGA (odds ratio 1.8, 95% CI 1.2 to 2.7). CONCLUSIONS: These findings indicate that relatively modest interventions strategies are feasible and lead to high levels of physician implementation of and patient adherence to physician-initiated CGA recommendations. These interventions appear to be particularly effective in HMO patients and for recommendations that were deemed to be "most important".

Accidental Falls↗

PubMed1996

Sensitivity, specificity, and predictive values of screening tests for eye conditions in a clinic-based population.

PURPOSE: To assess four commonly available visual function tests to detect visually disabling or vision-threatening eye conditions among new patients of a large, urban, public, general ophthalmology clinic. METHODS: Three hundred seventeen patients were tested for contrast sensitivity, Amsler grid abnormalities, and visual acuity at near and at distance. A complete eye evaluation found the prevalence of serious eye diseases, allowing determination of the sensitivity (Sn), specificity (Sp), likelihood ratio (LR), and other characteristics of each test. RESULTS: Of 317 patients, most were Hispanic (77%), women (60%), and middle-aged (44 +/- 17 years). Normal findings were reported in 18%; refractive error in 43%; cataracts in 16%; glaucoma in 7.3%; and macular degeneration in 4.1%. Near visual acuity of 20/40 or worse (Sn = 0.75; Sp = 0.74; LR = 2.8); and distance visual acuity testing of 20/30 or worse (Sn = 0.74; Sp = 0.73; LR = 2.7) correlated significantly with ocular disease, whereas contrast sensitivity testing (Sn = 0.62; Sp = 0.41; LR = 1.1) and Amsler grid test (Sn = 0.19; Sp = 0.92; LR = 2.4) did not. Test performance decreased when refractive errors were excluded and among those younger than 40 years of age relative to those 40 years of age or older. CONCLUSION: Of the four screening tests studied, distance and near threshold visual acuities as defined above were judged to have the best correlations of an abnormal result with ocular disease, both including or excluding refractive error. Different combinations of tests did not result in more accurate detection of ocular disease. More efficient screening tools for detecting ocular disease need to be developed.

Adolescent↗

PubMed1996

Academic quality improvement: new medicine in old bottles.

Academic medical centers and clinicians have been slow to embrace continuous quality improvement. The Mount Sinai Medical Center in New York has created a new Department of Health Policy that combines an academic research mission with an administrative mission to demonstrate improving quality of care. This article discusses the conceptual framework that undergirds this new effort, its organizational structure and initial agenda of activities, and why we believe it will succeed in engaging academic physicians in quality improvement.

Academic Medical Centers↗

PubMed1995

Managed care and capitation in California: how do physicians at financial risk control their own utilization?

OBJECTIVE: To describe the structure and range of utilization management methods initiated by physicians in response to capitation. DESIGN: Cross-sectional questionnaire. SETTING: A large network-model health maintenance organization (133 contracting physician groups) in California. PARTICIPANTS: 94 (71%) physician groups caring for 2.9 million capitated patients. MEASUREMENTS: Self-reported use of five major utilization management methods. RESULTS: All physician groups reported using gate-keeping and preauthorization for certain referrals or tests. Most also used profiling of utilization patterns (79%), guidelines (70%), and managed care education (69%). Most physician groups asked gatekeepers to submit preauthorization requests for specialty referrals and restricted patient self-referral. For example, 60% of groups required preauthorization for an internal medicine subspecialty referral, and 7% allowed patient self-referral. Most groups also asked gatekeepers to obtain preauthorization for many tests (for example, 95% for magnetic resonance imaging and 53% for pulmonary function tests). Preauthorization requests were denied infrequently (less than 10% of the time) by more than 75% of groups. Of the 54 groups reporting utilization profiles to their physicians, 61% never adjusted for case-mix among patients and more than 60% suggested practice changes to their physicians based on utilization. Fewer than 35% of the groups used written guidelines for expensive tests that required preauthorization (such as angiography). CONCLUSIONS: Physicians are responding to capitation by using utilization management techniques, some at early stages of development, that were previously used only by insurers. This physician-initiated management approach represents a fundamental transformation in the practice of medicine.

California↗

PubMed1995

The decline in coronary artery bypass graft surgery mortality in New York State. The role of surgeon volume.

OBJECTIVE: To examine the longitudinal relationship between surgeon volume and in-hospital mortality for coronary artery bypass graft (CABG) surgery in New York State and to explain changes in mortality that occurred over time. DESIGN: Observation of clinically risk-adjusted operative mortality over time. SETTING: All 30 New York State hospitals in which CABG surgery was performed for 1989 through 1992. PATIENTS: All 57,187 patients undergoing isolated CABG surgery in New York State in 1989 through 1992 in the 30 hospitals. MAIN OUTCOME MEASURES: Actual, expected, and risk-adjusted mortality. RESULTS: Risk-adjusted in-hospital mortality decreased for all categories of surgeons. Low-volume surgeons (< or = 50 operations per year) experienced a 60% reduction in risk-adjusted mortality in the 4-year period, whereas the highest-volume surgeons (> 150 operations per year) experienced a 34% reduction. The percentage of patients undergoing CABG surgery by low-volume surgeons decreased from 7.6% in 1989 to 5.7% in 1992, a 25% decrease. CONCLUSIONS: The overall decline in risk-adjusted mortality could not be explained by shifts in patients away from low-volume surgeons to high-volume surgeons. The proportionately larger decrease in risk-adjusted mortality for low-volume surgeons could not be explained by changes in patient case mix or by improvements in the performance of surgeons with persistently low volumes. Part of the decrease was a result of the exodus of low-volume surgeons with high risk-adjusted mortality (in all years studied), the markedly better performance of surgeons who were new to the system (especially in 1991 and 1992), and the performance of surgeons who were not consistently low-volume surgeons (especially in 1992).

Clinical Competence↗

PubMed1995

Cost-effectiveness of low-air-loss beds for treatment of pressure ulcers.

BACKGROUND: Cost-effectiveness of low-air-loss beds for the healing of pressure ulcers was analyzed in the nursing home setting. A statistical model of pressure ulcer healing was used to estimate cost-effectiveness based on patient and ulcer characteristics. METHODS: Results of a previous randomized trial (84 patients from three nursing homes in Los Angeles) were reanalyzed and combined with estimates of costs to calculate the cost-effectiveness in dollars per added day free of pressure ulcers achieved by the use of low-air-loss beds compared to conventional foam mattresses. RESULTS: The cost-effectiveness of the low-air-loss bed was $26 per added day free of ulcers for our standard patient. Results were sensitive to low-air-loss bed lease costs and patient and wound healing characteristics. Results were less sensitive to expected mortality, daily wound care costs, and time-frame of consideration. Low-air-loss beds were more cost-effective for patients with good healing characteristics and mild ulcers. CONCLUSIONS: Findings support the expanded use of this technology for patients with mild pressure ulcers and good healing characteristics. For these patients, the cost-effectiveness of low-air-loss beds is comparable to other accepted health treatments. For patients with severe ulcers and poor healing characteristics, low-air-loss bed cost-effectiveness compares poorly with other accepted health treatments unless the lease cost can be substantially reduced, or unless life with a pressure ulcer is valued close to death.

Aged↗

PubMed1995

Variation and quality of self-report health data. Asians and Pacific Islanders compared with other ethnic groups.

Variation in the sociodemographic, system, and disease characteristics of Asians and Pacific Islanders compared with other ethnic groups and the quality of standard self-report measures of health and functioning by ethnic groups were examined. Secondary analysis of self-report data from the Medical Outcomes Study, an observational study of adult outpatients who received care in either prepaid or fee-for-service plans, was used to compare 527 Asians and Pacific Islanders to patients in other ethnic groups (16,989 whites, 2,533 African Americans, 1,009 Latinos, and 446 others). These patients all completed a screening questionnaire after visits with a Medical Outcomes Study clinician. Asians and Pacific Islanders were similar to African Americans and Latinos on most sociodemographic and system characteristics, disease status, and risk factors. Ethnicity was a significant predictor of differences in self-reported health. As a group, Asians and Pacific Islanders had better health or health of equal status compared with whites, but were less satisfied and perceived less sharing in the doctor-patient relationship compared with other ethnic groups. However, results suggest that data from standard functioning measures for Asians should be interpreted with caution and that more work is needed to understand better the social and cultural influences on the health of Asians and Pacific Islanders.

Adolescent↗

PubMed1995

Measuring physical function in community-dwelling older persons: a comparison of self-administered, interviewer-administered, and performance-based measures.

PURPOSE: To compare two self-administered, one interviewer-administered, and one performance-based measure of physical function in community-based older persons. METHODS: Eighty-three subjects were recruited from meal sites, senior recreation centers, and senior housing units for a comprehensive geriatric assessment program. At the time of screening, study participants self-administered the Functional Status Questionnaire (FSQ) and were administered the Katz Activities of Daily Living (ADL) and the Older Americans Resources and Services Instrumental Activities of Daily Living (OARS-IADL) instruments by interview. Participants also completed the Physical Performance Test (PPT) and were given the Medical Outcomes Study SF-36 to self-administer on site or at home and return by mail. RESULTS: All 83 subjects completed FSQ, Katz ADL, OARS-IADL, and PPT; 72 returned SF-36 forms. Correlations between the two self-administered physical function measures (FSQ and SF-36) were higher than between self-administered and interviewer-assessed (ADL and OARS-IADL) or performance-based (PPT) measures. When assessed for construct validity, the self-administered, OARS, and PPT measures had comparable correlations with role limitations as a result of physical health problems, but relationships between physical functional status measures and other SF-36 measures of health were inconsistent. CONCLUSION: The relationships between commonly used self-administered, interviewer-administered, and performance-based measures of physical function were inconsistent and weak, suggesting that these instruments are not measuring the same construct.

Activities of Daily Living↗

PubMed1995

A cost and value analysis of two interventions with incontinent nursing home residents.

OBJECTIVE: More than half of nursing home residents suffer from urinary incontinence. These residents typically have long stays and, because of comorbid cognitive and physical impairments, have little hope of living again in a noninstitutional environment The value of interventions to change functional status of this chronically institutionalized population is often questioned. This paper explores this value issue in the context of two incontinence management interventions that have been shown to improve functional status: (1) Functional Incidental Training (FIT), and (2) Prompted Voiding (PV). The relative value of the different interventions for the nursing home population was estimated using paired preferences. DESIGN: The cost of two interventions (FIT and PV) that target incontinent nursing home residents was related to the value of these interventions as perceived by consumers of nursing home services. Both interventions decrease incontinence frequency, and one intervention also improves mobility endurance. PARTICIPANTS: Ninety incontinent nursing home residents received the intervention; 37 older nondemented board and care residents and 31 family members of the nursing home residents provided estimates of the intervention's value. MEASUREMENT: The staff-time allocations involved in implementing both interventions were documented in more than 85 resident care episodes. These time data were converted to labor cost based on the cost of nursing aides who would actually implement the intervention. The value of each intervention was assessed by asking consumers to make choices between the intervention and its associated outcomes (such as increased dryness) and other nursing home services of known cost (e.g., moving to a private room). RESULTS: Both interventions had labor costs that were greater than "usual care" costs. The additional cost was estimated to be $4.31 per resident per day for PV and $6.42 per resident per day for FIT if these programs were implemented from 7 AM to 7 AM. Consumer preference data indicated that consumers preferred the FIT and PV outcomes to more expensive alternative services, calculated to cost $10.00 per day, often marketed to consumers, CONCLUSION: Consumers may prefer the FIT and PV interventions relative to the typical services often marketed to the nursing home consumer. The analysis completed in this paper suggests that both interventions have value for frail residents likely to live out their lives in a nursing home.

Activities of Daily Living↗

PubMed1995

Meta-analytic methods for health services research--an example from geriatrics.

The authors recently published a meta-analysis of controlled trials of comprehensive geriatric assessment (CGA). The results supported the view that efficacy of CGA is strongly related to the patients, objectives, and basic design of CGA programs, and that particular program models and design features are associated with important health outcome improvements (e.g., survival, living at home, and functional improvement at follow-up). Present objectives include the outline of methods and how they were developed given the condition of the trial database and scientific context. Aspects of the approach, such as (a) survey of primary trialists to recover unpublished information and standardize data, (b) development of a program typology to guide the principal analysis, and (c) incorporation of program design features as covariates where statistical heterogeneity was detected, proved extremely useful, and have implications for other systematic reviews of similarly complex primary trials of new health care technologies, health services, and organizational interventions.

Aged↗

PubMed1994

The importance of physician communication on breast cancer screening of older women.

BACKGROUND: Breast cancer screening rates, especially for mammography, continue to lag for older women, particularly for women older than 65 years. METHODS: We investigated the associations of key variables with reported rates of mammography and clinical breast examination in a sample of 972 women older than 50 years; 724 of them were older than 65 years. They were surveyed in late 1990 through 30-minute bilingual telephone interviews. RESULTS: Although it was hypothesized that race, age, health status, and physician-patient communication variables would influence utilization rates, only the communication variables (and two access variables) significantly predicted a recent mammogram or clinical breast examination. In particular, the style of the communication--the patient's report of the physician's enthusiasm for mammography when it was discussed with women at the office visit--influenced the women's screening behavior significantly. Women who perceived that their physicians had some enthusiasm for mammography were more than four and a half times more likely than women whose physicians had no or little enthusiasm for mammography to have had one within the previous year. Other findings were that about half of the Los Angeles, Calif, women in this study reported a recent mammogram, an increase from the one third who reported one in the previous survey of 1988; a decline in screening was not reported until after age 75 years. About a quarter of the study women, on the other hand, had never been screened despite the long-standing recommendation for regular screening of women older than 50 years and the risk of breast cancer increasing with age. Surprisingly, women at higher risk of breast cancer were not being screened any more systematically than women at lower risk. CONCLUSION: We conclude that improved physician-patient communication skills could be a highly effective and easy-to-learn strategy to increase overall screening rates.

Age Factors↗

PubMed1994

New York State's Cardiac Surgery Reporting System: four years later.

This study examined changes in the risk-adjusted mortality associated with coronary artery bypass grafting procedures performed in New York State during the first 4 years of New York's Cardiac Surgery Reporting System (1989 to 1992). To track performance over time, surgeons and hospitals were subdivided into three groups on the basis of their performance in 1989. The risk-adjusted mortality for each of the three groups was computed for 1992 and compared with their 1989 mortality. The results indicate that all groups of providers exhibited large reductions in the risk-adjusted mortalities, with the groups that showed the highest initial mortalities manifesting the most improvement. However, the group rankings remained the same in 1992 as they were in 1989. For example, when the hospital groups were based on the terciles of risk-adjusted mortality observed in 1989, the risk-adjusted mortality decreased from 2.72% to 2.19% for group 1, from 4.24% to 2.51% for group 2, and from 7.12% to 2.77% for group 3. Notably, the risk-adjusted mortalities of the three groups were all significantly different from one another in 1989, but were not significantly different from one another in 1992. Another interesting finding was that the volume of operations performed by the various provider groups did not change substantially in the 4-year period.

Coronary Artery Bypass↗

PubMed1994

Comprehensive geriatric assessment in a day hospital.

OBJECTIVE: To assess the effectiveness of comprehensive geriatric assessment conducted in day hospitals. DESIGN: Retrospective cohort comparison study with restricted inclusionary criteria and adjustment for baseline characteristics. SETTING: A hospital-based geriatric day hospital and geriatric clinic sites (both in the university and in the community). PATIENTS: Four hundred sixty-eight patients referred for comprehensive geriatric assessment during a 12-month period. INTERVENTION: Comprehensive geriatric assessment in a geriatric day hospital compared with assessment received in clinic sites without a day hospital. MAIN OUTCOME MEASURES: Services received in the first 2 weeks; hospitalization, emergency room visits, placement, death, and change in selected health status measures. Follow-up data was obtained from medical records, a telephone survey, and death certificates. RESULTS: Except in the case of rehabilitative services, day hospital patients were more likely to receive interdisciplinary services. The population seen in the day hospital was more functionally impaired and had significantly more dementia and depression. After adjusting for subjects' baseline characteristics and limiting the analyses to subjects meeting specific inclusionary criteria, the day hospital had no significant effect on mortality, use of emergency or hospital services, placement, or change on selected measures of health status. For example, compared with the clinic patients, receiving care in the day hospital was associated with an adjusted odds ratio of 1.01 (95% confidence interval: 0.53, 1.91) of being at a higher level of care at 6 months. The results were not sensitive to the choice of inclusionary criteria. CONCLUSION: Given their cost and uncertain effectiveness, day hospitals need additional evaluation before their further diffusion occurs.

Activities of Daily Living↗

PubMed1994

Geriatric home assessment after hospital discharge.

OBJECTIVES: To evaluate the feasibility of an intervention involving post-discharge geriatric home assessment and follow-up and to describe the spectrum of significant clinical problems identified during the home assessment. DESIGN: Prospective observational study nested within a randomized controlled trial. SETTING: Inpatient service of a large academic medical center in Southern California. PATIENTS: There were 152 adults aged 65 or greater who had one or more specific risk factors for functional decline or increased mortality, who were awaiting discharge from the hospital, and who were assigned to the intervention arm of a randomized controlled trial of post-discharge comprehensive geriatric home assessment. MAIN RESULTS: During the home assessment, the gerontologic nurse practitioner (GNP) identified new or worsening problems in 150 patients (99%); 61 problems (eg, serum sodium 125 mg/dL; severe orthostatic hypotension) were considered by a reviewing physician to require urgent medical attention. Older age, non-white race, and new incontinence were associated independently with a greater number of findings (P < 0.05). Based on the findings, an interdisciplinary team made an average of 3.4 recommendations per patient; only two of 111 requests for written approval of recommendations were rejected. CONCLUSIONS: Post-discharge visitation by a GNP to patients at high risk is capable of detecting a high yield of important and potentially reversible clinical problems. This multidisciplinary approach is acceptable to physicians. Research is needed to identify additional links between short hospital stays, impairment or instability at discharge, and adverse outcomes.

Academic Medical Centers↗

PubMed1993

Comprehensive geriatric assessment: a meta-analysis of controlled trials.

There is disagreement on the usefulness of comprehensive geriatric assessment (CGA) due to conflicting results from individual trials. We did a meta-analysis on 28 controlled trials comprising 4959 subjects allocated to one of five CGA types and 4912 controls. Published data were supplemented with reanalysed data provided by the original investigators. We calculated combined odds ratios of important outcomes by pooling data from individual trials with multivariate logistic regression. Combined odds ratio (95% confidence interval) of living at home at follow-up was 1.68 (1.17-2.41) for geriatric evaluation and management units, 1.49 (1.12-1.98) for hospital-home assessment services, and 1.20 (1.05-1.37) for home assessment services. Covariate analysis showed that programmes with control over medical recommendations and extended ambulatory follow-up were more likely to be effective. Our analysis suggests that CGA programmes linking geriatric evaluation with strong long-term management are effective for improving survival and function in older persons.

Activities of Daily Living↗

PubMed1993

The appropriateness of hysterectomy. A comparison of care in seven health plans. Health Maintenance Organization Quality of Care Consortium.

OBJECTIVE: To develop and test a method for comparing the appropriateness of hysterectomy use in different health plans. DESIGN: Retrospective cohort study. SETTING: Seven managed care organizations. PATIENTS: Random sample of all nonemergency, non-oncological hysterectomies performed in the seven managed care organizations over a 1-year period. Patients who were not continuously enrolled in a plan for 2 years prior to their hysterectomy were excluded. MAIN OUTCOME MEASURES: Proportion of women undergoing hysterectomy in each plan for inappropriate clinical reasons according to ratings derived from a panel of managed care physicians. RESULTS: Overall, about 16% of women underwent hysterectomy for reasons judged to be clinically inappropriate. Only one plan had significantly more hysterectomies rated inappropriate compared with the group mean (27%, unadjusted). Adjusting for age and race did not affect the rankings of the plans and had little effect on the numeric results. CONCLUSION: The rates of inappropriate use of hysterectomies are similar to those for other procedures and vary to a small degree among health plans. This information may be useful to purchasers when they consider which health plans to offer their employees.

Adult↗

PubMed1993

Conflicting aims. Voluntary health insurance and contemporary medical practice.

American medicine is financed today by a patchwork of systems formed around a concept of competitive voluntary health insurance that evolved over the past 50 years. This article reviews the theory of health insurance from a clinical perspective to examine whether changes in medical science and practice have made such an insurance system obsolete. As it is currently applied, a system of competitive voluntary health insurance conflicts with the goals of modern medical practice due to advances in screening and in treatment and the need to deal more effectively with paying for care of unknown efficacy. Proposals to reform health insurance must deal with the medical failings of competitive voluntary health insurance and should do more than simply extend the current system to cover more Americans.

Economic Competition↗

PubMed1993

Using multidimensional health measures in older persons to identify risk of hospitalization and skilled nursing placement.

We examine the relationship between multidimensional measures of function and outcomes in a cohort of older persons admitted to the residential care level of a multi-level long-term care facility. We collected self-reported measures of various aspects of health using the Medical Outcome Study Short-form Health Survey (SF-20) and the Dartmouth COOP charts, as well as performance-based measures of physical and cognitive function. Subjects (mean age 84.3 years) were followed for a median of 557 days. In multivariate analyses, emotional function (measured by either the SF-20 or COOP method) was a predictor of placement in skilled care. Self-reported overall health (measured by either the SF-20 or COOP method) and timed manual performance were predictive of hospitalization. Change on the functional status measures between 2 points in time was not associated with later placement in skilled care except in the case of timed manual performance. In an older population at risk for frequent and numerous health events, this study shows that two popularized self-report methods for assessing function yield results that predict future outcomes of great importance to older persons. However, measures that predict use of long-term care may not predict use of the hospital and vice versa.

Activities of Daily Living↗