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RESEARCH AND PRACTICE |
Jane K. Burke-Miller and Judith A. Cook are with the Center on Mental Health Services Research and Policy, Department of Psychiatry, University of Illinois at Chicago. Mardge H. Cohen is with the CORE Center, Cook County Hospital, Cook County Bureau of Health Services, Chicago. Nancy A. Hessol is with the Department of Medicine, University of California, San Francisco. Tracey E. Wilson is with the Department of Preventive Medicine and Community Health, State University of New York Downstate Medical Center, Brooklyn. Jean L. Richardson is with the Department of Preventive Medicine, University of Southern California, Los Angeles. Pete Williams is with the Division of Infectious Diseases, Montefiore Medical Center, Bronx, NY. Stephen J. Gange is with the Department of Epidemiology, Johns Hopkins University School of Public Health, Baltimore, Md.
Correspondence: Requests for reprints should be sent to Jane K. Burke-Miller, MS, Center on Mental Health Services Research and Policy, University of Illinois at Chicago, 104 S Michigan Ave, Suite 900, Chicago, IL 60603 (e-mail: jburke{at}psych.uic.edu).
| ABSTRACT |
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Objectives. We used longitudinal data to examine the roles of 4 dimensions of patient satisfaction as both predictors and outcomes of use of highly active antiretroviral therapy (HAART) among women in the United States with HIV/AIDS.
Methods. Generalized estimating equations were used to analyze time-lagged satisfactionHAART relationships over 8 years in the Womens Interagency HIV Study.
Results. Multivariate models showed that, over time, HAART use was associated with higher patient satisfaction with care in general, with providers, and with access/convenience of care; however, patient satisfaction was not associated with subsequent HAART use. Symptoms of depression and poor health-related quality of life were associated with less satisfaction with care on all 4 dimensions assessed, whereas African American race/ethnicity, illegal drug use, and fewer primary care visits were associated with less HAART use.
Conclusions. Our findings suggest that dissatisfaction with care is not a reason for underuse of HAART among women with HIV and that providers should not be discouraged from recommending HAART to dissatisfied patients. Rather, increasing womens access to primary care could result in both increased HAART use and greater patient satisfaction.
| INTRODUCTION |
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Satisfaction with care is variously considered to be a health outcome, a quality of care indicator, and a predictor of patient behavior. Patient satisfaction is one of the most commonly measured outcomes of patient care other than mortality and morbidity.5 Wu and colleagues recommended that patient satisfaction, along with measures of health status and essential care processes, be used as a quality of care indicator for adults with HIV/AIDS.6 In addition, there is extensive research demonstrating the association between measures of satisfaction and patient behaviors (e.g., use of primary care) and clinical outcomes.711 In all of these roles, satisfaction can be thought of as a social construct negotiated between consumers and providers of health care, as well as a necessary component of and an outcome of effective care.12
Although the meaning and interpretation of patient satisfaction remain a matter of debate,8 there is consensus that patient satisfaction is a measurable concept comprising multidimensional elements such as access to care, quality of the providerpatient interpersonal relationship, and affordability of care.7,8,12 Research also has established that variations in satisfaction with health care often involve patient sociodemographic or psychosocial characteristics.
For example, in a meta-analysis of more than 220 studies, Hall and Dorman found that numerous patient demographic characteristics predicted care satisfaction, including older age, low education levels, being married, and higher social status, although these relationships varied across racial/ethnic and gender groups.13 In a study of satisfaction with care among women with HIV/AIDS, Burke et al. found that levels of patient satisfaction varied across different dimensions of care.14 In the same study, some patient characteristics were associated with lower satisfaction across multiple dimensions of care, including the presence of depressive symptoms, poor self-reported health, lack of a regular health care provider, Hispanic/Latina race/ethnicity, and nonuse of antiretroviral therapy.
Satisfaction with care among patients with HIV/AIDS has been shown to be associated with adherence to antiretroviral therapy15,16 but has seldom been studied in relationship to other patient behaviors such as use of HAART. Given the ongoing importance of HIV/AIDS as a womens health issue17 and evidence that HAART is underused among women,1,18 we examined the role of satisfaction with care as both a predictor and an outcome of HAART use. Absent a randomized controlled experiment, evidence of causality is best inferred from analyses of temporal relationships, such as those revealed in longitudinal cohort data.4 Study of long-term temporal relationships in a prospective cohort might clarify the role of patient satisfaction as a predictor of patient behaviors as well as an outcome of care. We addressed 2 research questions: (1) Are there dimensions of patient satisfaction related to subsequent HAART use? and (2) Does HAART use influence dimensions of subsequent patient satisfaction?
| METHODS |
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Measures
The RAND Patient Satisfaction Questionnaire, Short Form (PSQ-18),21 was used to annually assess patients satisfaction with their health care. The PSQ-18 has demonstrated validity and reliability in various patient populations, including men and women with HIV/AIDS.14,22,23 The dimensions of satisfaction measured by this multidimensional instrument are as follows: technical quality, interpersonal manner, communication, financial aspects, time spent with provider, accessibility and convenience of care, and general satisfaction. However, the scale authors have provided evidence that technical quality, interpersonal manner, communication, and time spent with provider are substantially correlated and can be aggregated into a single subscale reflecting satisfaction with ones provider.21,24
Therefore, we created 4 subscales in accordance with the PSQ-18 scoring instructions21; that is, we reversed negative items so that all items were scored on a scale of 1 (least satisfaction) to 5 (most satisfaction), we excluded missing items, and we averaged the available items. All 4 subscale scores were negatively skewed, with minimum and maximum values of 1 to 5, means ranging from 3.65 to 3.98, and medians ranging from 3.94 to 4.00. Across all visits, correlation coefficients among the 4 subscales ranged from 0.36 (between financial aspects of care and access/convenience of care) to 0.75 (between general satisfaction and satisfaction with provider), indicating divergent validity. We tested the collinearity of the 4 subscales in a regression model. No subscales had common variance proportions above 0.50 on a principal component, indicating that multicollinearity would not be a significant problem in the multivariate model.25
In guidelines published in 1998, the National Institutes of Health26 defined HAART as involving treatment with 2 or more nucleotide reverse transcriptase inhibitors and a protease inhibitor (e.g., indinavir, saquinavir, ritonavir, or nelfinavir) or in combination with a nonnucleotide reverse transcriptase inhibitor (e.g., nevirapine or delavirdine). In this study, non-HAART combination antiretroviral therapy, monotherapy, and no therapy were all grouped into the non-HAART category.
Our choices of time-varying and fixed covariates for assessment were based on the literature on patient satisfaction and use of HAART and antiretroviral therapy among women with HIV. Sociodemographic factors assessed included race/ethnicity (African American, Hispanic/Latina, White), age at baseline (greater than the sample median age of 36 years), any employment, low income (less than $12 000 per year), high school education, and residence in ones own home or apartment. Psychosocial factors included illegal drug use (crack, cocaine, heroin, amphetamines), probable depression (score of 16 or above on the Center for Epidemiological Studies Depression Scale27), and high health-related quality of life (score above 50 on the Medical Outcomes Study HIV Instrument28). Clinical factors included CD4 count below 200, detectable HIV RNA viral load, and any of 6 HIV-related symptoms (fever, memory loss, numbness, weight loss, confusion, night sweats).
Factors associated with health service delivery included type of insurance coverage (Medicaid or private); presence of a usual source of health care; receipt of care in an emergency room; out-of-pocket payments made to providers or hospitals or for prescriptions; and frequency of primary care visits. To control for possible relationships between study visit compliance and patient satisfaction or HAART use, we created a dichotomous variable intended to identify women who had completed 75% or more of all study visits versus those who had not. Study site also was included in the multivariate analyses to control for regional variations in satisfaction and HAART use. Correlations among covariates did not exceed 0.50 and were not sufficient to introduce multicollinearity into the statistical model, especially given the high power of the analysis.29
Data Analysis
Postbaseline patient satisfaction and HAART use were lagged to previous study visits so that, at each time point in the analysis, dependent variables were measured 1 study visit after independent variables and covariates, approximating a 6-month time interval. We used univariate and multivariate generalized estimating equations to test relationships between satisfaction and HAART use over time; we present the results of these tests in the form of odds ratios (ORs). Generalized estimating equation analyses do not require a balanced design (i.e., observations at all measurements for each participant), and they accommodate correlated errors due to repeated measures.30 We used a binomial logit function to estimate likelihood of HAART use and a normal identity function for patient satisfaction subscales. SAS (SAS Institute Inc, Cary, NC) was used in conducting the analyses.
| RESULTS |
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Patient Satisfaction and Subsequent HAART Use
Table 2
presents the results of univariate generalized estimating equation analyses of the unadjusted relationships between the 4 dimensions of patient satisfaction and subsequent use of HAART. Scores on all 4 subscales of satisfaction with care were positively and significantly (P< .05) associated with subsequent HAART use; odds ratios were 1.17 for the financial satisfaction subscale, 1.23 for the general satisfaction subscale, 1.36 for the satisfaction with access/convenience subscale, and 1.40 for the satisfaction with provider subscale.
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Table 3
shows the results of the multivariate generalized estimating equation analyses, in which none of the measures of satisfaction were associated with subsequent HAART use. The factors that remained significantly (P< .05) associated with later HAART use were study time interval (OR = 1.23), clinical markers of HIV (i.e., CD4 count below 200 [OR = 1.78] and detectable viral load [OR = 1.69]), and more frequent visits with providers (35 visits every 6 months [OR = 1.84] and 6 or more visits [OR = 2.38]). Women who reported use of illegal drugs were less likely to subsequently report HAART use (OR = 0.60), as were African American women (OR = 0.70) and women who had an emergency room visit (OR = 0.81).
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In addition to the positive relationship of HAART use with all 4 satisfaction subscales, women who reported better health-related quality of life, who usually saw the same provider, or who completed 75% or more of their scheduled study visits were more likely to report higher subsequent satisfaction on all 4 subscales. In contrast, symptoms of depression and HIV-related symptoms were consistently associated with a lower likelihood of satisfaction on all 4 subscales. Other univariate relationships exhibited less consistent patterns.
At the multivariate level (Table 3
), use of HAART continued to be significantly (P< .05) associated with a greater likelihood of subsequent general satisfaction (OR = 1.06), satisfaction with provider (OR = 1.07), and satisfaction with access/convenience (OR = 1.08), but it was not related to satisfaction with financial aspects of care. Continuing the pattern seen in the univariate analyses, reports of higher health-related quality of life were consistently and significantly associated with higher satisfaction on all 4 subscales, whereas depressive symptomatology was consistently and significantly associated with less satisfaction on all 4 subscales.
Other sample characteristics were associated with different dimensions of satisfaction. For example, Hispanic/Latina women were more satisfied than others on the general measure of care (OR = 1.12), as were those usually seeing the same provider (OR = 1.17); lower-income women were less satisfied on this dimension (OR = 0.94). Women were more likely to be satisfied with their provider if they had more education (OR = 1.06), usually saw the same provider (OR = 1.09), or had completed most of their study visits (OR = 1.07), whereas women with very low incomes (OR = 0.94) or HIV-related symptoms (OR = 0.94) were less satisfied on this dimension. Less satisfaction with financial aspects of care was associated with paying out of pocket for care (OR = 0.85) and with being employed (OR = 0.92); women with Medicaid coverage were more likely to be satisfied with the financial aspects of their care (OR = 1.09).
Finally, women who had Medicaid or private insurance coverage and those who visited their providers 3 to 5 times or 6 or more times every 6 months were more likely to later report higher satisfaction with access/convenience of care (ORs = 1.08, 1.11, 1.06, and 1.12, respectively). Factors that were not significantly associated with subsequent satisfaction with care on any dimension in the multivariate analyses included passage of time, African American race/ethnicity, reported use of illegal drugs, age, housing stability, CD4 count and viral load, and use of an emergency room for care.
| DISCUSSION |
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Our findings suggest that the relatively low rate of HAART use observed (less than 67%) may not be the result of women being dissatisfied with their care and, as a consequence, rejecting effective therapies. Women who were less satisfied with their care on 4 different dimensions were as likely to report later HAART use as were women who were highly satisfied with their care. Rather, use of HAART was associated with patients demographic and psychosocial characteristics, their previous health status, and their previous use of other health services. These findings are in keeping with the predisposing, need, and enabling components of the behavioral model of HIV health service use described by Anderson and colleagues.31 According to this model, need variables (CD4 count and viral load) are predictive of HAART use, as are predisposing and enabling variables related to patient characteristics (race/ethnicity, drug use) and health care delivery characteristics (more frequent visits, no emergency room use).
The finding that African American women were less likely to report HAART use than White women is consistent with the patterns of poorer quality of HIV care observed among members of racial/ethnic minority groups in other studies, including those involving large patient databases and nationally representative data.2,31,32 Similarly, the finding that women who reported use of illicit drugs such as crack, cocaine, heroin, or amphetamines were less likely than women who did not to report subsequent HAART use replicates the findings of other studies33,34; this disparity has been hypothesized to be the result of providers withholding HAART from active drug users owing to concerns about adherence or other issues.35 For example, a survey of more than 900 US infectious disease physicians treating HIV patients revealed that although most physicians follow guidelines for the prescription of HAART, nonmedical factors related to patients life situations (e.g., adherence history, homelessness, alcohol and drug use, previous psychiatric hospitalizations) are as important as disease severity in treatment decisions.36
We did not find that type of insurance coverage was significantly related to HAART use, perhaps because the majority of women taking part in the WIHS received care under Medicaid programs. However, other characteristics of health service use were associated with subsequent use of HAART, including completing more provider visits and not using an emergency room for care. Accessibility is one of the components of primary care suggested to be an important determinant of quality of care and outcomes among patients with HIV,37 and it may be a precursor to other essential processes of care such as pharmacotherapy and referrals to specialty services.
As mentioned, we found that use of HAART was significantly associated with subsequent patient satisfaction on 3 distinct dimensions: general satisfaction, satisfaction with provider, and satisfaction with access/convenience. It would appear that, despite the many difficulties associated with the complexity and side effects of HAART regimens, women using HAART were later more satisfied with their care than those not using HAART. This finding also raises the possibility that improved health status stemming from use of HAART may result in greater satisfaction with care among women with HIV/AIDS.
In addition, women who saw the same provider for their care and who had more visits with their providers reported higher subsequent satisfaction with their providers. The latter relationship was also related to use of HAART in this cohort, suggesting that more frequent primary care visits are significant in terms of both patients satisfaction and their use of the most potent and effective forms of antiretroviral therapy. Given an association between higher quality primary care and HIV patient outcomes,37 frequency or intensity of outpatient care could be argued to be an important indicator of HIV care quality as well as a predictor of both patient satisfaction and HAART use. The finding that HAART use was not related to subsequent satisfaction with financial aspects of care again may be related to the majority of the women being covered by Medicaid.
In general, factors consistently associated with higher patient satisfaction on multiple dimensions have to do with patients mental health status and health-related quality of life, which are themselves moderately correlated. Regardless of HAART use, women with high levels of depressive symptoms were less satisfied on all 4 dimensions, whereas those who perceived their health-related quality of life as good were more satisfied on all 4 dimensions. These findings are in keeping with the results of other studies involving HIV patients that have shown better mental health status and health-related quality of life to be associated with better ratings of care and patientprovider relationships.38,39
Previous studies of HIV/AIDS also have shown that depression is associated with perceived poor health status and that both depression and poor health status are associated with dissatisfaction with medical care.14,40 In addition, depression has been shown to be highly prevalent among women with HIV/AIDS and to be associated with underuse of HAART.41,42,43 It may be that patients with poorer health-related quality of life and more depressive symptoms have more complex care needs, and researchers in this area have stated the need for better patientprovider communication as a means of improving HIV patients care experiences,38,39 as well as the need for increased awareness of potential mental health problems and access to mental health services.14,41
This study involved a number of limitations, and its results must be interpreted with caution. For example, although the WIHS includes a large, multisite cohort, the results are not necessarily generalizable to all women in the United States with HIV/AIDS. In addition, patient satisfaction was measured annually rather than biannually during the study period, limiting opportunities to observe change. Also, although we had data on numbers of health care encounters, we lacked data on the quality of care provided; women in the non-HAART group may have been receiving appropriate combination or other therapies that were not identified as such. Moreover, we did not have information on the demographic characteristics of providers, their HIV expertise, or their levels of satisfaction with their patients and their own caregiving, nor were we able to determine whether the women in this study were constrained in their choice of providers and frequency of provider visits.
The results of this study have practical implications for improving medical care among women with HIV/AIDS. First, quality of care and outcomes of care can be informed through multidimensional assessments of womens satisfaction with their care. Second, health insurance coverage, in particular Medicaid coverage, is important in terms of ensuring access to care among women with HIV/AIDS. Public policies that maintain or expand public and private health care coverage in this population should be supported.
Third, as noted by others, efforts are still needed to increase womens use of primary HIV care.1,2,44 Increasing use of such care as well as HAART use may enhance opportunities for women and their providers to address co-occurring problems (e.g., depression and social service needs) as women become more satisfied with their care. Greater accessibility and frequency of care also could encourage use of HAART, thus improving patient satisfaction. Finally, in keeping with recent recommendations of the HIV Medicine Association of the Infectious Diseases Society of America, all women treated for HIV should be screened for depression and other mental health problems.45
| Acknowledgments |
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Data for this study were collected by the Collaborative Study Group of the Womens Interagency HIV Study, with the following centers (principal investigators in parentheses): New York City/Bronx Consortium (Kathryn Anastos); Brooklyn, NY (Howard Minkoff); Washington, DC, Metropolitan Consortium (Mary Young); Connie Wofsy Study Consortium of Northern California (Ruth Greenblatt); Los Angeles County/Southern California Consortium (Alexandra Levine); Chicago Consortium (Mardge Cohen); and Data Coordinating Center (Stephen Gange).
Human Participant Protection
We obtained informed consent from the participants in accordance with procedures and consent materials reviewed and approved by the committee on human experimentation of each collaborative institution.
| Footnotes |
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Contributors
J. K. Burke-Miller originated the study, conducted the analyses, and led the writing. J. A. Cook contributed to the writing. All of the authors helped to conceptualize ideas, interpret findings, and review drafts of the article.
Accepted for publication November 18, 2005.
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