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Ron D Hays

Publications and source records attributed to Ron D Hays.

At least 55 records · Page 3Linked to original sources
PubMed2005

Patterns of unit and item nonresponse in the CAHPS Hospital Survey.

OBJECTIVE: To examine the predictors of unit and item nonresponse, the magnitude of nonresponse bias, and the need for nonresponse weights in the Consumer Assessment of Health Care Providers and Systems (CAHPS) Hospital Survey. METHODS: A common set of 11 administrative variables (41 degrees of freedom) was used to predict unit nonresponse and the rate of item nonresponse in multivariate models. Descriptive statistics were used to examine the impact of nonresponse on CAHPS Hospital Survey ratings and reports. RESULTS: Unit nonresponse was highest for younger patients and patients other than non-Hispanic whites (p<.001); item nonresponse increased steadily with age (p<.001). Fourteen of 20 reports of ratings of care had significant (p<.05) but small negative correlations with nonresponse weights (median -0.06; maximum -0.09). Nonresponse weights do not improve overall precision below sample sizes of 300-1,000, and are unlikely to improve the precision of hospital comparisons. In some contexts, case-mix adjustment eliminates most observed nonresponse bias. CONCLUSIONS: Nonresponse weights should not be used for between-hospital comparisons of the CAHPS Hospital Survey, but may make small contributions to overall estimates or demographic comparisons, especially in the absence of case-mix adjustment.

Adolescent↗
PubMed2005

Methods used to streamline the CAHPS Hospital Survey.

OBJECTIVE: To identify a parsimonious subset of reliable, valid, and consumer-salient items from 33 questions asking for patient reports about hospital care quality. DATA SOURCE: CAHPS Hospital Survey pilot data were collected during the summer of 2003 using mail and telephone from 19,720 patients who had been treated in 132 hospitals in three states and discharged from November 2002 to January 2003. METHODS: Standard psychometric methods were used to assess the reliability (internal consistency reliability and hospital-level reliability) and construct validity (exploratory and confirmatory factor analyses, strength of relationship to overall rating of hospital) of the 33 report items. The best subset of items from among the 33 was selected based on their statistical properties in conjunction with the importance assigned to each item by participants in 14 focus groups. PRINCIPAL FINDINGS: Confirmatory factor analysis (CFA) indicated that a subset of 16 questions proposed to measure seven aspects of hospital care (communication with nurses, communication with doctors, responsiveness to patient needs, physical environment, pain control, communication about medication, and discharge information) demonstrated excellent fit to the data. Scales in each of these areas had acceptable levels of reliability to discriminate among hospitals and internal consistency reliability estimates comparable with previously developed CAHPS instruments. CONCLUSION: Although half the length of the original, the shorter CAHPS hospital survey demonstrates promising measurement properties, identifies variations in care among hospitals, and deals with aspects of the hospital stay that are important to patients' evaluations of care quality.

Adolescent↗
PubMed2005

Equivalence of mail and telephone responses to the CAHPS Hospital Survey.

OBJECTIVE: To estimate the effect of survey mode (mail versus telephone) on reports and ratings of hospital care. DATA SOURCES/STUDY SETTING: The total sample included 20,826 patients discharged from a group of 24 distinct hospitals in three states (Arizona, Maryland, New York). We collected CAHPS data in 2003 by mail and telephone from 9,504 patients, of whom 39 percent responded by telephone and 61 percent by mail. STUDY DESIGN: We estimated mode effects in an observational design, using both propensity score blocking and (ordered) logistic regression on covariates. We used variables derived from administrative data (either included as covariates in the regression function or used in estimating the propensity score) grouped in three categories: individual characteristics, characteristics of the stay and hospital, and survey administration variables. DATA COLLECTION/EXTRACTION METHODS: We mailed a 66-item questionnaire to everyone in the sample and followed up by telephone with those who did not respond. PRINCIPAL FINDINGS: We found significant (p<.01) mode effects for 13 of the 21 questions examined in this study. The maximum magnitude of the survey mode effect was an 11 percentage-point difference in the probability of a "yes" response to one of the survey questions. Telephone respondents were more likely to rate care positively and health status negatively, compared with mail respondents. Standard regression-based case-mix adjustment captured much of the mode effects detected by propensity score techniques in this application. CONCLUSIONS: Telephone mode increases the propensity for more favorable evaluations of care for more than half of the items examined. This suggests that mode of administration should be standardized or carefully adjusted for. Alternatively, further item development may minimize the sensitivity of items to mode of data collection.

Data Collection↗
PubMed2005

The association of health-related quality of life with survival among persons with HIV infection in the United States.

OBJECTIVES: Both clinical trials and observational studies of persons with HIV infection commonly include health-related quality of life (HRQOL) measures, but less is known about the relation of HRQOL to survival among persons with HIV since the development of effective antiretroviral treatment. DESIGN/PARTICIPANTS: Prospective cohort study of a national probability sample of 2,864 adults receiving HIV care. INDEPENDENT VARIABLES: The main independent variables were derived from the HIV Cost and Services Utilization Study (HCSUS) HRQOL measure, and include physical and mental HRQOL summary scores (divided into quartiles) constructed from the following items administered at baseline: physical functioning (9 items, alpha=0.91), role functioning (2 items, alpha=0.85), pain (2 items, alpha=0.84), general health perceptions (3 items, alpha=0.80), emotional well-being (7 items, alpha=0.90), social functioning (2 items, alpha=0.82), energy (2 items, alpha=0.74), and a single-item measure of disability days (days in bed for at least 0.5 day due to health). MAIN OUTCOME VARIABLE: Death between January 1996 and December 1999. ANALYSIS: Descriptive and multivariate adjusted Cox proportional hazards regression analysis of survival by physical and mental HRQOL. RESULTS: By December 1999, 17% of the sample had died. In unadjusted analysis, persons in the higher quartiles of physical HRQOL, as well as those in the higher quartiles of mental HRQOL at baseline, had significantly better survival than those in lower quartiles. In multiple regressions controlling for a number of sociodemographic and clinical variables, the hazard of death for those in the highest quartile of physical HRQOL was one quarter of that for those in the lowest quartile. This difference was similar in magnitude to that observed for being on highly active antiretroviral therapy versus no antiretrovirals in this population. By contrast, there was no unique association of mental HRQOL with survival. CONCLUSIONS: Physical HRQOL added prognostic information over and above the sociodemographic and routinely available clinical data such as CD4 count and stage of HIV infection. Measurement of HRQOL, which is often performed to identify problems or assess outcomes, is also useful prognostically.

Adult↗
PubMed2005

Impact of chronic viral hepatitis on health-related quality of life in HIV: results from a nationally representative sample.

BACKGROUND: Little is known about the health burden of chronic viral hepatitis in HIV-infected patients. We compared health-related quality of life (HRQOL) of patients with HIV and hepatitis C virus (HCV) or HIV and hepatitis B virus (HBV) coinfection to those with HIV monoinfection. METHODS: Using a nationally representative sample of 1,874 adults with HIV who completed a baseline and two follow-up interviews, we identified those with HIV monoinfection (n = 1,493), HIV-HCV coinfection (n = 279), and HIV-HBV coinfection (n = 122). We measured baseline and change over time scores for physical and mental health (PHS, MHS), overall quality of life (QOL), overall health, and disability days. To identify the independent effect of coinfection, we adjusted for demographic and clinical predictors of HRQOL using multivariable regression. RESULTS: Despite significant differences in socio-demographic characteristics between groups, there were no differences in the baseline scores for PHS, MHS, overall QOL, overall health, or disability days between groups. The HRQOL did not decline significantly over time for the HIV patients with or without HCV or HBV coinfection. All groups reported similar longitudinal changes in the HRQOL scores for all measures. CONCLUSIONS: We found no significant differences in disease burden as assessed by a generic HRQOL instrument between patients with HIV monoinfection and HIV-HCV or HIV-HBV coinfection. These data are relevant in counseling coinfected patients regarding the impact of coinfection on HRQOL, and are important in designing clinical trials and conducting cost-effectiveness analyses including this vulnerable cohort.

Adolescent↗
PubMed2005

Evaluating the statistical significance of health-related quality-of-life change in individual patients.

Assessing individual change is feasible and potentially useful in clinical practice. This article provides an overview of the evaluation of statistically significant change in health-related quality of life (HRQOL) for individual patients. We review the standard error of measurement, standard error of prediction, and reliable change indices using a sample of 54 patients receiving care at the UCLA Center for East-West Medicine. The largest amount of change necessary for statistical significance was found for the reliable change index and the smallest change was needed for the standard error of measurement. The amount of change required for statistical significance was intermediate for the standard error of prediction. The median kappa for classifying change (declined, stayed the same, improved) by different indices was .82, indicating a high level of agreement. Future research is needed to determine if one index is most appropriate for evaluating the significance of individual change.

Female↗
PubMed2005

Application of structural equation modeling to health outcomes research.

This article provides an overview of the basic underlying principles of structural equation modeling (SEM). SEM models have two basic elements: a measurement model and a structural model. The measurement model describes the associations between the indicators (observed measures) of the latent variables, whereas the structural model delineates the direct and indirect substantive effects among latent variables and between measured and latent variables. The application of SEM to health outcomes research is illustrated using two examples: (a) assessing the equivalence of the SF-36 and patient evaluations of care for English- and Spanish-language respondents and (b) evaluating a theoretical model of health in myocardial infarction patients. The results of SEM studies can contribute to better understanding of the validity of health outcome measures and of relationships between physiologic, clinical, and health outcome variables.

Cross-Cultural Comparison↗
PubMed2005

Comparison of mail and telephone in assessing patient experiences in receiving care from medical group practices.

The medical group survey from the CAHPS (formerly Consumer Assessment of Health Plans Study) project, G-CAHPS, focuses on patient experiences in receiving care from their medical group practice. We compared mail and telephone responses to the G-CAHPS survey in a sample of 880 patients from four physician groups. Patients were randomly assigned to mode. Analyses included comparison of response rates, missing data, internal consistency reliability of six multi-item scales, and mean scores. A total of 537 phone completes and 343 mail completes were obtained (54% response rate). There were no significant differences in internal consistency by mode. In addition, there was only one significant mode difference in item and composite means by mode of administration after adjusting for case-mix differences. This study indicates that mail and telephone modes of data collection for the G-CAHPS survey produce similar results.

Adult↗
PubMed2005

The effect of socioeconomic status on the survival of people receiving care for HIV infection in the United States.

HIV-infected people with low socioeconomic status (SES) and people who are members of a racial or ethnic minority have been found to receive fewer services, including treatment with Highly Active Antiretroviral Therapy (HAART), than others. We examined whether these groups also have worse survival than others and the degree to which service use and antiretroviral medications explain these disparities in a prospective cohort study of a national probability sample of 2,864 adults receiving HIV care. The independent variables were wealth (net accumulated financial assets), annual income, educational attainment, employment status (currently working or not working), race/ethnicity, insurance status, use of services, and use of medications at baseline. The main outcome variable was death between January 1996 and December 2000. The analysis was descriptive and multivariate adjusted Cox proportional hazards regression analysis of survival. By December 2000, 20% (13% from HIV, 7% non-HIV causes) of the sample had died. Those with no accumulated financial assets had an 89% greater risk of death (RR=1.89, 95% CI=1.15-3.13) and those with less than a high school education had a 53% greater risk of death (RR=1.53, 95% CI=1.15-2.04 ) than their counterparts, after adjusting for sociodemographic and clinical variables only. Further adjusting for use of services and antiretroviral treatment diminished, but did not eliminate, the elevated relative risk of death for those with low SES by three of the four measures. The finding of markedly elevated relative risks of death for those with HIV infection and low SES is of particular concern given the disproportionate rates of HIV infection in these groups. Effective interventions are needed to improve outcomes for low SES groups with HIV infection.

Adolescent↗
PubMed2005

Effect of a multidisciplinary intervention on communication and collaboration among physicians and nurses.

BACKGROUND: Improving communication and collaboration among doctors and nurses can improve satisfaction among participants and improve patients' satisfaction and quality of care. OBJECTIVE: To determine the impact of a multidisciplinary intervention on communication and collaboration among doctors and nurses on an acute inpatient medical unit. METHODS: During a 2-year period, an intervention unit was created that differed from the control unit by the addition of a nurse practitioner to each inpatient medical team, the appointment of a hospitalist medical director, and the institution of daily multidisciplinary rounds. Surveys about communication and collaboration were administered to personnel in both units. Physicians were surveyed at the completion of each rotation on the unit; nurses, biannually. RESULTS: Response rates for house staff (n = 111), attending physicians (n = 45), and nurses (n = 123) were 58%, 69%, and 91%, respectively. Physicians in the intervention group reported greater collaboration with nurses than did physicians in the control group (P < .001); the largest effect was among the residents. Physicians in the intervention group reported better collaboration with the nurse practitioners than with the staff nurses (P < .001). Physicians in the intervention group also reported better communication with fellow physicians than did physicians in the control group (P = .006). Nurses in both groups reported similar levels of communication (P = .59) and collaboration (P = .47) with physicians. Nurses in the intervention group reported better communication with nurse practitioners than with physicians (P < .001). CONCLUSIONS: The multidisciplinary intervention resulted in better communication and collaboration among the participants.

Adult↗
PubMed2005

Psychometric properties of a group-level Consumer Assessment of Health Plans Study (CAHPS) instrument.

BACKGROUND: Many different surveys have been used to evaluate the performance of medical groups, but there is a growing recognition that standardization could be helpful to consumers, purchasers, and others. OBJECTIVES: We sought to develop a version of the Consumer Assessment of Health Plans Study (CAHPS) survey for use with medical groups (G-CAHPS) and assess its reliability and validity. RESEARCH DESIGN: The research team reviewed existing instruments and conducted patient focus groups in 4 sites to identify aspects of care that were especially important to patients when evaluating medical groups. We tested a draft instrument in 75 cognitive interviews with adults 18 years of age or older in Knoxville, St. Louis, and California and pretests in 4 groups of adults in Boston and Denver. We then surveyed random samples of patients from medical groups and practice sites in California, Knoxville, St. Louis, and Denver. We analyzed the psychometric characteristics of the instrument. RESULTS: Data support the reliability and validity of 3 multi-item measures of access, office staff service, and patient clinician communication. Measures related to specialty care and preventive counseling did not differentiate among medical groups. CONCLUSIONS: The G-CAHPS instrument provides an assessment of selected aspects of care that are important to consumers and could be a useful complement to the plan-level CAHPS instrument.

Adult↗
PubMed2005

Responsiveness of the SF-36 and the Health Assessment Questionnaire Disability Index in a systemic sclerosis clinical trial.

OBJECTIVE: This study compares the responsiveness to change of the Medical Outcomes Study Short Form Health Survey (SF-36), a measure of health related quality of life (HRQOL), and the Health Assessment Questionnaire Disability Index (HAQ-DI), a function instrument, in a randomized clinical trial for treatment of systemic sclerosis (SSc). METHODS: A phase 2/3, multicenter, prospective, placebo controlled trial was conducted to evaluate human recombinant relaxin treatment in patients with diffuse SSc over 24 weeks. At baseline, subjects had stable, moderately severe, diffuse SSc of disease duration < or = 5 years, modified Rodnan skin score > or = 20, serum creatinine < 2.0 mg/dl, percentage forced vital capacity (% FVC) predicted > or = 50%, and % DLCO predicted > or = 40% and were not receiving concomitant disease modifying therapies. Internal consistency reliability of multi-item scales was estimated using Cronbach's alpha. Responsiveness to change of the SF-36 and HAQ-DI was computed between Weeks 0 and 24. Subjects were classified as unchanged or having a meaningful change in 4 different external measures: Change in (1) skin score > or = 30%; (2) % FVC predicted of > or = 15%; (3) self-reported patient global assessment by visual analog scale (VAS) > or = 20%; and (4) physician global assessment by VAS of > or = 20%. Responsiveness indices were computed and Cohen's effect size criteria were used to assess the magnitude of change. RESULTS: A total of 239 patients participated in this trial, with 196 completing the 24 week trial. Cronbach's alpha for the SF-36 scales ranged from 0.76 to 0.93 and for the HAQ-DI ranged from 0.69 to 0.91 (good to excellent). The SF-36 had a larger magnitude of responsiveness in overall disease (patient and physician global assessment) compared to the HAQ-DI, while the HAQ-DI had a larger magnitude of responsiveness in clinical measures (i.e., change in skin score and % FVC predicted) than the SF-36. CONCLUSION: These data support inclusion of both the SF-36 and HAQ-DI as outcome measures in future clinical trials of diffuse SSc.

Adult↗
PubMed2004

Psychometric properties of the Medical Outcomes Study Sleep measure.

BACKGROUND AND PURPOSE: Sleep is an active and highly organized biological process that is an important component of life. Self-report measures of sleep provide information that can be useful for characterizing the quality of sleep in subgroups of the population. A 12-item self-report sleep measure, the Medical Outcomes Study Sleep measure, was developed and evaluated previously in a sample of 3445 individuals with chronic illness. PATIENTS AND METHODS: In this study, we evaluate the psychometric properties of the MOS Sleep measure in a nationally representative sample of 1011 US adults aged 18 and older and in a sample of 173 adults with neuropathic pain participating in a clinical drug trial. RESULTS: The average age of the general population sample was 46; 51% were female and 81% were white. The average age of the sample of adults with neuropathic pain was 72; 53% were female and 95% were white. Internal consistency reliability estimates for the MOS Sleep scales were 0.73 or higher, with the exception of the daytime somnolence scale in the US general population, which was 0.63. At baseline of the clinical trial, the neuropathic pain patients reported significantly more sleep disturbance and daytime somnolence, as well as less quantity and adequacy of sleep than patients in the general US population. The MOS Sleep scales were found to be responsive to change in the clinical trial with statistically significant improvements observed after administration of pregabalin for sleep disturbance (standardized response mean, SRM=-0.76, P=0.0007), shortness of breath (SRM=-0.20, P=0.0302), sleep adequacy (SRM=0.57, P=0.0014), sleep quantity (SRM=0.55, P=0.0086), and sleep problems (SRM=-0.62, P=0.0036). CONCLUSIONS: This study provides further support for the reliability and validity of the MOS Sleep measure. The instrument can be used to assess important aspects of sleep perceived by adults in the general population or participating in clinical studies.

Adult↗
PubMed2004

Racial and ethnic differences in patients' preferences for initial care by specialists.

PURPOSE: To examine racial and ethnic differences in patients' preferences for initial care by specialists, and to determine whether trust in the physician and health beliefs account for these differences. METHODS: We conducted a cross-sectional study of 646 patients in the waiting room of three academic-based internal medicine outpatient practices. We asked subjects about their preference to see their primary care provider or a specialist first regarding the actual health problem that had brought them to see their physician as well as regarding three hypothetical scenarios (2 weeks of new-onset exertional chest pain, 2 months of knee pain, and rash for 4 weeks). We examined the relation among patients' preference for initial care by a specialist and their demographic characteristics, global ratings of their primary care physician and health plan, trust in their primary care physician, and other health beliefs and attitudes. RESULTS: Averaged for the three scenarios and actual health problem, 13% of patients preferred to see a specialist first. Adjusting for all other covariates, blacks (risk ratio [RR] = 0.55; 95% confidence interval [CI]: 0.20 to 0.92) and Asians (RR = 0.46; 95% CI: 0.19 to 0.75) were much less likely to prefer a specialist than were whites. Patients with less confidence in their primary care physician and greater certainty about needed tests and treatments were more likely to prefer a specialist. These variables, however, did not explain the difference in preference for specialist care among blacks, Asians, and whites. CONCLUSION: Blacks and Asians are less likely than whites to prefer initial care by a specialist. Future studies should examine whether differences in preference for care lead minorities to underutilize appropriate specialty care or lead whites to overuse specialty care.

Adult↗
PubMed2004

No evidence of an association between transient HIV viremia ("Blips") and lower adherence to the antiretroviral medication regimen.

BACKGROUND: Transient human immunodeficiency virus (HIV) viremia, a common phenomenon among patients taking antiretroviral therapy, is often attributed to lapses in adherence to the medication regimen. We investigated this relationship in a prospective observational cohort of 128 patients initiating a new regimen. METHODS: A case of transient viremia was defined as an HIV RNA level of 40-1000 copies/mL ("blip") sandwiched between 2 months of HIV RNA levels <40 copies/mL ("pre" and "post"). Adherence was most often measured with a composite adherence score (CAS), which is primarily based on electronically measured adherence. Case subjects' adherence and dose-timing was compared with (1) that of other patients (control subjects), who had undetectable virus loads for 3 consecutive months, and (2) that during periods of sustained undetectable virus loads among the case subjects themselves, if available. RESULTS: Among the 28 case subjects, mean CAS-measured adherence did not decrease before transient viremia; adherence during the pre, blip, and post periods were 86%, 84%, and 80%, respectively. Control subjects had lower adherence levels during the corresponding 3 months (77%, 79%, and 75%, respectively; P = .046). Among the 19 patients able to serve as their own controls, CAS-measured adherence was higher during the period of transient viremia than during control periods (P = .01). Similar relationships were found when comparing only electronically measured adherence on a week-wise basis. There were no significant differences in dose-timing error between case subjects and control subjects. CONCLUSIONS: We found no evidence that transient HIV viremia is associated with decreases in adherence or differences in dose-timing. Other etiologies for transient viremia should be evaluated.

Adult↗
PubMed2004

The applicability of the Consumer Assessments of Health Plans Survey (CAHPS) to Preferred Provider Organizations in the United States: a discussion of industry concerns.

OBJECTIVE: This paper examines the applicability of a leading patient survey, the Consumer Assessments of Health Plans Study (CAHPS), to Preferred Provider Organizations (PPOs) in the United States. DESIGN: Elite interviews were conducted with users of the CAHPS survey in PPO settings. STUDY PARTICIPANTS: Study participants attended either the California Healthcare Foundation Quality Performance Measurement in Preferred Provider Organizations Forum or the National Conference to Examine PPO Quality. Eleven representatives of state and federal government health care purchasers, commercial PPO plans, and survey vendors were included. MAIN OUTCOME MEASURES: The interview included 21 questions addressing experiences with and concerns about using the CAHPS survey in PPO settings. RESULTS: Respondents raised concerns about the influence of out-of-network care on CAHPS reports and ratings of PPO health plans. Suggestions were made for additional PPO-relevant items such as after-hours care, numbers and types of specialists in the PPO network, and disease management. CONCLUSIONS: Modifications to some of the CAHPS survey items are needed to address concerns of users about their applicability in PPO settings.

Community Participation↗
PubMed2004

Racial differences in the impact of irritable bowel syndrome on health-related quality of life.

GOALS: To compare the impact of irritable bowel syndrome (IBS) on health related quality of life (HRQOI) for non-white and white IBS patients. BACKGROUND: There are no reported data evaluating the HRQOL of non-white persons with IBS. STUDY: SF-36 scores are compared between non-white IBS patients (n = 166), white IBS patients (n = 707), the general US population, and patients with selected chronic diseases. RESULTS: Of the n = 166 non-white IBS patients included for analysis, 66 (40%) described themselves as African-American, 56 (34%) as Hispanic, 25 (15%) as Asian-American, 2 (1%) as Native American and the remaining 17 (10%) as "other." Compared with white IBS patients, non-white IBS patients reported similar decrements in their HRQOL after controlling for age, gender, income and education level. On all 8 SF-36 scales, non-white IBS patients had significantly worse HRQOL compared with the general US population, (P < 0.001). Compared with GERD patients, non-white IBS patients scored significantly lower on all SF-36 scales (P < 0.001) except physical functioning. Similarly, non-white IBS patients had significantly worse HRQOL on selected SF-36 scales compared with diabetes mellitus and ESRD patients. Non-white IBS patients had significantly better emotional well-being than depressed patients, (P < 0.001). CONCLUSIONS: Non-white IBS patients experience impairment in vitality, role limitations-physical, and bodily pain. Yet overall, non-white IBS patients report similar HRQOL to white IBS patients. These data provide the first detailed evaluation of the impact of IBS on HRQOL in non-white IBS patients.

Adult↗