JAIDS Journal of Acquired Immune Deficiency Syndromes:
Implementation and Operational Research: Clinical Science
Measuring HIV Self-Management in Women Living With HIV/AIDS: A Psychometric Evaluation Study of the HIV Self-Management Scale
Webel, Allison R. PhD, RN*; Asher, Alice RN, CNS†; Cuca, Yvette MPH, MIA‡; Okonsky, Jennifer G. PhD, RN, MA, NP§; Kaihura, Alphoncina RN, MSN§; Rose, Carol Dawson PhD, RN§; Hanson, Jan E. BS‖; Salata, Robert A. MD¶
*Frances Payne Bolton School of Nursing, Case Western Reserve University, Cleveland, OH
†Center for AIDS Prevention Studies, University of California San Francisco, School of Nursing, San Francisco CA
‡Department of Social and Behavioral Sciences, University of California, San Francisco, San Francisco, CA
§Department of Community Health Systems, School of Nursing, University of California, San Francisco, San Francisco, CA
‖Departments of Anthropology and Public Health, Case Western Reserve University, Cleveland, Ohio
¶Division of Infectious Diseases and HIV Medicine, Department of Medicine, Case Western Reserve University, Cleveland, OH.
Correspondence to: Allison R. Webel, PhD, RN, Frances Payne Bolton School of Nursing, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106-4904 (e-mail: firstname.lastname@example.org).
This was not an industry-supported study. This research was funded in part by grants from the National Institutes of Health (5KL2RR024990, 1UL1 RR024989, TL1 RR024129, T32 NR007081, and P30 NR010676) in the United States.
Meetings at which part of this data was presented: Preliminary findings were presented at the Clinical and Translational Research Education Meeting; April 27–29, 2011; Washington, DC; Association of Nurses in AIDS Care; November 2011; Baltimore, MD.
The contents of this article are solely the views of the authors and do not represent the official views of the National Institutes of Health.
The authors have no conflicts of interest to disclose.
Supplemental digital content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal's Web site (http://www.jaids.com/).
Received September 26, 2011
Accepted March 19, 2012
Objective: To develop and validate the HIV Self-management Scale for women, a new measure of HIV self-management, defined as the day-to-day decisions that individuals make to manage their illness.
Methods: The development and validation of the scale was undertaken in 3 phases: focus groups, expert review, and psychometric evaluation. Focus groups identified items describing the process and context of self-management in women living with HIV/AIDS (WLHA). Items were refined using expert review and were then administered to WLHA in 2 sites in the United States (n = 260). Validity of the scale was assessed through factor analyses, model fit statistics, reliability testing, and convergent and discriminate validity.
Results: The final scale consists of 3 domains with 20 items describing the construct of HIV self-management. Daily self-management health practices, social support and HIV self-management, and chronicity of HIV self-management comprise the 3 domains. These domains explained 48.6% of the total variance in the scale. The item mean scores ranged from 1.7 to 2.8, and each domain demonstrated acceptable reliability (0.72–0.86) and stability (0.61–0.85).
Conclusions: Self-management is critical for WLHA, who constitute over 50% of people living with HIV/AIDS (PLWHA) and have poorer health outcomes than their male counterparts. Methods to assess the self-management behavior of WLHA are needed to enhance their health and wellbeing. Presently, no scales exist to measure HIV self-management. Our new 20-item HIV Self-management Scale is a valid and reliable measure of HIV self-management in this population. Differences in aspects of self-management may be related to social roles and community resources, and interventions targeting these factors may decrease morbidity in WLHA.
Over the past 3 decades, an increasing number of women have been infected with HIV.1 In the United States, women account for 25% of all new HIV infections,2 and worldwide, they comprise almost one-half of all new infections.3 Women over age 50 are increasingly diagnosed with HIV, and due to advances in medical therapy, women living with HIV/AIDS (WLHA) have longer life spans.4 Consequently, WLHA are increasingly diagnosed with chronic non–AIDS-defining health conditions including psychiatric, cardiovascular, gynecological, hepatic, and pulmonary disorders.5–7 These comorbidities require many self-management behaviors similar to those required to successfully manage HIV including adhering to medical treatment and appointments,8 monitoring symptoms,9 increasing engagement with one's health care provider,10,11 managing family responsibilities,12 managing the impact of stigma,13,14 preventing sexually transmitted diseases,15,16 and managing the interaction of all chronic diseases.17–20 Self-management work is challenging, but to WLHA, it can be particularly overwhelming, compared to men, due to the sex disparities in both accessibility to health care resources and health outcomes.21–24 The number and complexity of the numerous self-management tasks can be daunting for WLHA, and yet this self-management behavior can help minimize the impact of these health conditions on a woman's daily functioning.25 This work suggests that self-management is important for WLHA, and to improve self-management behaviors in this population, clinicians and researchers working with WLHA to enhance these skills must consider the social and environmental context in which those behaviors will occur.
In health care, self-management has been defined as the day-to-day decisions and subsequent behaviors that individuals make to manage their illnesses and promote health.17,19,26,27 Increasing the self-management skills of all persons living with HIV/AIDS may be a key way to achieve the broad aims put forth in the National HIV/AIDS Strategy for the United States,28 especially those addressing the treatment and care of non–AIDS-defining chronic comorbidities. However, before behavioral interventions targeting HIV self-management can be developed, a valid and reliable measure of HIV self-management is needed. Several scales have been created to assess self-management for specific conditions such as asthma and diabetes,29 but none have been identified that are specific to HIV or specifically designed to assess self-management in women. Two validated scales have been developed to measure HIV self-management self-efficacy: the Perceived Medical Conditions Self-Management Scale30 and the HIV Symptom Management Self-efficacy for Women Scale.31 However, although self-efficacy is often considered an important mediator of behavior change, it is not the same as behavior. Self-efficacy describes one's belief that they are able to accomplish a certain task,32 whereas self-management describes the tasks one completes to manage their illnesses and promote health.17 To date, no one has inductively designed and psychometrically tested a scale measuring HIV self-management behavior in adults living with HIV/AIDS. A comprehensive measure of self-management is required to precisely evaluate the different facets of self-management in adults and particularly in WLHA and to identify which aspects can be modified to decrease morbidity. Without such a measure, it will be impossible to accurately assess the effects of new self-management interventions in this vulnerable population.33 Therefore, our objective is to report on the development and validation of a new measure of HIV self-management for WLHA, the HIV Self-management Scale.
MATERIALS AND METHODS
Sample and Procedures
This was a prospective mixed-method scale development study of HIV self-management in adult WLHA. We followed DeVellis's34 guidelines for scale development, incorporating both qualitative and quantitative procedures. Accordingly, there were 3 main phases of scale development: (1) qualitative focus groups to generate an item pool, (2) expert review of format and item pool, and (3) psychometric evaluation of the items.34 Figure 1 describes the development of the HIV Self-management Scale.
Phase 1: Qualitative Focus Groups
Forty-eight adult (21 years and older) WLHA in Ohio attended 1 of 12 focus groups from January to April 2010. The purpose of the focus groups was to describe qualitatively how WLHA understand and practice self-management of chronic diseases. Before beginning the focus groups, each participant completed an informed consent document and a demographic survey. The focus groups were digitally recorded, transcribed verbatim, and a research assistant kept field notes to record key points of the discussion and important observations (nonverbal agreement, mood of the group, and body language). Each participant was compensated for her time. A semistructured focus group guide was used to facilitate the discussion on HIV self-management, and was iteratively revised after each focus group to reflect the new issues discussed. We used qualitative description and content analysis35–37 to identify important themes and potential scale items. When possible, the participants' actual language was used to generate possible scale items, thus enhancing item validity.34 Using these methods, we ended up with 40 possible items, representing 15 categories of HIV self-management. Additional information on the study design, sample, methods, data analysis, and results of the qualitative focus group can be found in previous publications.38,39
Phase 2: Expert Review of Scale Format and Item Pool
For the next phase of the study, 14 HIV experts (social workers, community advocates, and researchers), self-management experts (clinicians and researchers), and adult women living with HIV were recruited to evaluate the scale format and each item. To be included in this phase of the study, participants had to be adult and either be a WLHA or someone deemed to have expertise in the area of HIV self-management. In accordance with established standards, participants were purposively selected for their clinical or scientific expertise because they were believed to have knowledge related to the practical or theoretical underpinnings of HIV self-management.40 The mean age of the experts was 43 years (±8.3 years), and 86% (12 of 14) were female. All participants signed an informed consent document before reviewing the scale format and item pool. Participants were then given a list of each of the 40 items and asked to read, evaluate, and then rate each item on its relevance to HIV self-management, its clarity, and its uniqueness on a 10-point Likert scale (1 = not relevant, clear or unique; 10 = totally relevant, clear, or unique).40 Participants also provided written comments about each of the items. The research team met and evaluated each of these responses and arrived at consensus about which items to include in the psychometric evaluation of the HIV Self-management Scale. Using these methods we discarded 13 items, reducing the scale to 27 total items in 10 domains (Fig. 1). Additionally, we modified the responses to include a 3-point Likert scale to enhance the consistency of scoring by WLHA.34 For this scaling, 0 indicated the item was not applicable to the individual participant, 1 meant the individual item occurred none of time, 2 meant the item occurred some of the time, and 3 indicated the item occurred all the time for the individual participant. With this scoring method, higher scores suggest more HIV self-management. We submitted this 27-item, unidirectional, 3-point Likert scale for psychometric evaluation.
Phase 3: Psychometric Evaluation of the Items
To evaluate the psychometric properties for the HIV Self-management Scale, we recruited 260 women from HIV clinics and AIDS service organizations in Ohio and the San Francisco Bay Area in California. To be included in this sample, participants had to have a confirmed HIV diagnosis, be adult (21 years and older), identify as female, and speak fluent English. Individuals were excluded if they were unable to give written informed consent or complete the survey. We chose to recruit from the San Francisco Bay Area in addition to Northeast Ohio to capture a wide range of experiences from participants. After explaining the study to potential participants, they were asked to sign an informed consent document and complete a pen and paper survey containing the HIV Self-management Scale and related scales (described below). To assess test–retest reliability of the scale, 40% (n = 108) of the participants returned 2 to 5 weeks later to complete the same survey. Each time the participant completed the survey, she was compensated with a $25 gift card. All study data were managed using REDCap electronic data capture tools hosted at University Hospitals, Case Medical Center.41
At all times, the ethical implications of the study and sensitive nature of the topics discussed were at the forefront of the researchers' actions. All study procedures were reviewed and approved by the institutional review committees for the protection of human subjects at the University Hospitals, Case Medical Center, and at the University of California, San Francisco. To further protect participant privacy, a Certificate of Confidentiality was obtained from the National Institutes of Health.
Scales were chosen based on Ryan and Sawin's Individual and Family Self-management Theory,42 which organizes the process of self-management into contextual and process factors and proximal and distal outcomes. These factors are particularly relevant to WLHA given the unique self-management issues they face including balancing self-management tasks with their many social roles and completing self-management tasks in the context of fewer economic, educational, and health care resources than their male counterparts.23,24,38
Information on the HIV-specific factors related to self-management was obtained through a demographic survey and from medical chart abstraction. The Brief Demographic Survey assessed age, education, and family level of income. The Medical Information Form assessed the individual participant's health status and health care utilization in the previous 12 months. Access to care and transportation were assessed using Cunningham's Access to Care Instrument.43,44 The social environment was assessed using the Social Capital Scale.45,46 A description of the number of items, the reliability, and the scoring procedures of each of the scales used in this study can be found in Supplemental Digital Content 1 (see Table, http://links.lww.com/QAI/A312).
Self-efficacy was assessed using the abbreviated Chronic Disease Self-efficacy Scale,47 and additional process factors, including goal setting, self-monitoring, planning and action, social support, and collaboration with the health care provider, were assessed with the HIV Self-management Instrument, the newly developed 27-item scale described in phase 2.
The proximal outcomes of HIV-specific behaviors included engagement with a health care team and HIV medication adherence. We assessed engagement with a health care team by administering the Health Care Provider Scale.10 HIV medication adherence behavior was assessed using a 3-Day Visual Analog Scale.48 Additionally, reasons for nonadherence were assessed using the 9-item Revised AIDS Clinical Trials Group Reasons for Missed Medications.49 The distal outcomes of quality of life and health care utilization were assessed using the HIV/AIDS-Targeted Quality of Life Instrument50 and the Medical Information Form (described above).
We analyzed all demographic and medical characteristics using appropriate descriptive statistics. In the psychometric evaluation phase of the HIV Self-management Scale, we used descriptive statistics to explain each of the 27 items based on the 0- to 3-point Likert scale scores described above. In accordance with the acceptable standard procedures of instrument development,34 we performed exploratory and confirmatory factor analyses, obtained fit statistics, completed reliability testing, and examined convergent and discriminate validity. Exploratory factor analysis using principle axis factoring with direct oblimin rotation was conducted using all 27 items at baseline, from both sites.51 We examined the factor loadings for each item to ensure they met our inclusion criteria of a 0.40 loading, which is conventionally assumed to explain the major components of a factor.34 We deleted the poorest performing items, one at a time, and reran the exploratory factor analysis after each item deletion. We repeated this process until all items had a factor loading of approximately 0.40 and loaded on 1 coherent factor. We performed reliability testing using Cronbach alpha for internal consistency on the resulting factors, at baseline and follow-up. We calculated Pearson correlation coefficients to analyze the convergent and discriminant validity of the scale. We used Stata version 11.2 and SPSS version 17.0 to analyze the data.
Demographics and Medical Characteristics
A total of 260 WLHA completed the survey packet during the psychometric evaluation phase. The mean age was 46 (±9.3) years. Most (86%) had children, were African American (66%), and single (59%). Most (79%) were unemployed, had permanent housing (82%), and had a mean annual income of $12,576 (±$15,001). Medically, participants' mean year of HIV diagnosis was 1997 (±7.3 years), most were currently prescribed antiretroviral therapy (ART) (80%), had an undetectable viral load (70%), and had a median CD4 cells per microliter of 484. A range of chronic comorbidities were reported including psychiatric, cardiovascular, gynecological, hepatic, and pulmonary disorders. Additional information about the demographics and medical characteristics of participants in the psychometric evaluation phase are listed in Table 1.
TABLE 1-a Demographi...Image Tools
Psychometric and Quantitative Results
TABLE 1-b Demographi...Image Tools
After iteratively deleting poor items, we removed 7 of the original 27 items, determining that a 3-factor solution with 20 items best described the construct of HIV self-management and fit the psychometric data. This factor solution included factors with eigenvalues greater than 1.0 and explained 48.6% of the total variance in the scale (Table 2). The 3-domain solution corresponded to the process factors of Individual and Family Self-management Theory.42
Domain 1: Daily Self-management Health Practices
The first domain, Daily Self-management Health Practices, included 12 items (Table 3). Participants in the San Francisco Bay Area had significantly higher domain scores at baseline (t = −2.31, P = 0.02). This domain corresponds to the process dimension of the Individual and Family Self-management Theory, which includes self-regulation skills and abilities (goal setting, self-monitoring, planning and action, self-evaluation, and emotional control). This factor had high internal consistency, indicating acceptable levels of scale reliability. As expected, we also found evidence for convergent validity of domain 1 with the Chronic Disease Self-efficacy Scale (r = 0.34, P < 0.01 at baseline; r = 0.32, P < 0.01 at follow-up) due to the well-established relationship between chronic disease self-efficacy and self-management practices.19
Domain 2: Social Support and HIV Self-management
The second domain, Social Support and HIV Self-management, consisted of 3 items. Participants in the San Francisco Bay Area site had significantly higher domain scores at baseline (t = −2.10, P = 0.04) and follow-up (t = −2.80, P < 0.01). This domain represents the social facilitation aspect of the process dimension of the Individual and Family Self-management Theory, which includes concepts of social influence, social support, and collaboration with health care professionals. This domain also had high internal consistency, and we found evidence for convergent validity of this domain with the Social Capital Scale (r = 0.18, P < 0.01 at baseline; r = 0.24, P = 0.03 at follow-up).
Domain 3: Chronic Nature of HIV Self-management
The final domain, Chronic Nature of HIV Self-management, consisted of 5 items. There were no significant differences in the mean domain score between the 2 sites. This domain represents the knowledge and belief aspect of the process dimension of the Individual and Family Self-management Theory, which includes concepts of self-efficacy, outcome expectancy, and goal congruence. This factor had moderate internal consistency. We also found evidence for convergent validity of domain 3 with the Chronic Disease Self-efficacy Scale (r = 0.26, P < 0.01 at baseline; r = 0.27, P < 0.01 at follow-up), with our assessments of ART adherence (r = 0.18, P < 0.01 at baseline), and the number of years living with an HIV diagnosis (r = 0.29, P < 0.01 at baseline).
Fit statistics provided additional evidence that our final scale represents a good fit of the data [χ2 (163) = 273.36, P < 0.01; root mean squared error of approximation (RMSEA) = 0.050; Tucker–Lewis Index (TLI) = 0.91; Confirmatory Fit Index (CFI) = 0.93]. This model is shown in Figure 2. The RMSEA, TLI, and the CFI approximated to the recommended cutoff range for fit indices (RMSEA < 0.60; TLI and CFI > 0.95).52 Taken together, the results of our factor analyses and the corresponding fit statistics indicate that the 20-item HIV Self-management Scale is a valid measure of the process of HIV self-management in WLHA.
Longer life expectancies of PLWHA have led to an aging population living with HIV. Many WLHA will be increasingly diagnosed with additional chronic disease comorbidities, and compared with men, WLHA tend to have fewer health care resources and poorer health outcomes.23,24 These comorbidities will require additional self-management work, and interventions to increase self-management behaviors will be critical to maintaining and improving the health of these women and their families. However, before assessing the efficacy of such interventions, we must first have a way to measure the process of HIV self-management. Such a scale will help us to better understand which aspects of self-management influence health outcomes and how to improve self-management behavior in this population. Similar disease-specific scales have been developed for other chronic illnesses including diabetes,53 multiple sclerosis,54 and heart failure,55 but none have been developed for HIV. These scales have been used to evaluate the efficacy of clinical self-management interventions. This psychometric evaluation study provided initial evidence for the validity and reliability of a scale measuring HIV self-management in WLHA. We developed a brief, 20-item, HIV-specific scale in a generalizable sample of WLHA in the United States, and at this time, this scale should only be considered valid in this population. However, this scale could have wider applicability, namely, to WLHA in other countries with a high prevalence of HIV. To facilitate this, future research should expand this work by employing appropriate translation procedures, conducting additional psychometric testing, and reporting these findings in relevant scholarly venues. Additionally, this scale could be adapted for clinical settings to help health care providers more efficiently address self-management issues impacting the medical management goals of WLHA. The clinical application of the HIV Self-management Scale can also help fulfill the recommendation of the National HIV/AIDS Strategy to enhance client assessment tools and measurement of health outcomes in people living with HIV with non–AIDS-defining health conditions.
This valid and reliable scale captures 3 overarching aspects of HIV self-management that apply both to HIV itself and the other non–AIDS-defining conditions that are increasingly prevalent in this population. This scale measures aspects of self-management that are commonly cited as desirable for women with chronic health conditions (including the health promotion activities of physical activity, dietary modifications, and setting health goals; engaging in social support activities; and maintaining a good relationship with one's health care provider). It also highlights several new factors impacting the ability of a WLHA to self-manage her HIV disease, including the (1) relationship between job and family responsibilities and self-management, (2) centrality and difficulty obtaining personal time in this population, and (3) importance of accepting the chronic nature of HIV to enhance self-management behaviors. These factors can be modified through well-designed community-based and clinic-based interventions, and such interventions may decrease morbidity and increase quality of life in WLHA.
It is important to note that the daily self-management health practices domain and the social support and self-management domain had significant differences between the Northeast Ohio site and the San Francisco Bay Area site. These geographic differences may indicate the context-specific nature of several domains. Daily self-management practices and social support may depend more on the available community resources including accessibility to health care, availability of social services (case managers, housing, and public transportation), and a more institutionalized acceptance of WLHA. However, the chronic nature of HIV is perhaps a more stable domain, and this acceptance may not depend on the availability of social and community resources, as shown by little difference in this domain between the 2 sites. For example, once a woman accepts the chronic nature of her HIV disease, her priorities, motivators, and relationship with her health care provider may become more routine and less sensitive to changes in her social environment, whereas the ability of WLHA to engage in health promotion activities, to manage distressing symptoms, and to attend support groups may depend on the more flexible environmental factors described above. These factors should be further explored as they may be ideal targets of interventions to increase self-management in WLHA.
We acknowledge several limitations in our study. First, we choose to use methodology consistent with classical testing theory instead of the more recently developed item response theory. We made this choice because we believed the results of these analyses would be more familiar to scholars in the field and would enhance the usefulness of our study. However, it is possible that our findings are different than those that would have been obtained with item response analyses. Second, participants in both the focus group and expert review phases of this study were all from Northeast Ohio. This limited geographic area may represent a source of bias in our scale development and may have led us to exclude pertinent items from the scale. This may also explain the site differences in daily self-management health practices domain and the social support and self-management domains. However, by testing the tool in San Francisco, which we believe represents a different environment than Ohio, we feel that the differences in the findings between the sites in fact strengthens the validity of the scale. Third, participants were recruited from a convenience sample and not through a random sampling of WLHA. It is possible that our participants vary systematically from the entire population of WLHA, and this may have an impact on our findings and decreased the generalizability of our scale. However, the sites from which we recruited our participants are representative of the sites in which WLHA in the United States seek out care and treatment, which minimizes this risk of bias. Finally, most of our participants were prescribed ART, and the self-management issues contained in our scale may not be entirely generalizable to WLHA not on or adherent to ART and those at higher risk for opportunistic infections and other complications.
In conclusion, the development and validation testing of the HIV Self-management Scale supports the reliability and validity of this new scale. This measure will permit future researchers and clinicians to assess and integrate aspects of HIV self-management in a variety of samples and settings, to better understand how to increase these important behaviors in this population.
The authors gratefully acknowledge the support of the women who participated in this study; our clinical colleagues in Northeast Ohio including Jane Baum, Robert Bucklew, Barbara Gripsholver, Isabel Hilliard, Melissa Kolenz, Monique Lawson, Jason McMinn, Michele Melnick, Cheryl Streb-Baran, and Julie Ziegler; and in the San Francisco Bay Area including Roland Zepf, Lisa Dazols, and all the staff at Ward 86; Edward Machtinger and the staff of the Women's HIV Program at the University of California, San Francisco and WORLD: Oakland. The authors also acknowledge the contributions of Anna G. Henry, Ryan Kofman, and Ann Williams.
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women; self-care; psychometrics; HIV; empirical research
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