Predicting fatigue and depression in HIV-positive gay men

Physiological and Psychological Correlates of Fatigue in HIV Disease

Fatigue is a frequent symptom reported by persons living with HIV disease and one that affects all aspects of quality of life. To improve quality of care of persons with HIV disease, it is important to address all factors that contribute to fatigue. The purpose of this study was to determine the associations of physiological, psychological, and sociological factors with fatigue in an HIV-infected population. With Piper’s integrated fatigue model guiding selection, factors examined in this study were hemoglobin, hematocrit, CD4+ cell count, HIV-RNA viral load, total sleep time, sleep quality, daytime sleepiness, HIV-related symptoms, anxiety, depression, and perceived stress. The sample (N = 79) for this descriptive correlational study was recruited from a primary health care association in South Carolina and consisted of 42 (53.2%) HIV-infected women and 37 (46.8%) HIV-infected men between the ages of 24 and 63 years (x = 39.9, s = 7.9). Of the participants, 70 (90%) were African American, 5 (6%) were Caucasian, and 3 (4%) were Hispanic. Using Pearson’s r, significant relationships were observed between fatigue and sleep quality, daytime sleepiness, HIV-related symptoms, state anxiety, trait anxiety, depression, and perceived stress. Sleep quality (F5,65 = 12.02, P = 0.0009), state anxiety (F5,65 = 8.28, P = 0.0054), HIV-related symptoms (F5,65 = 4.87, P = 0.0308), and depression (F5,65 = 7.31, P = 0.0087) retained significance in a 3-step, backward stepwise elimination model and accounted for 67% of the variance in fatigue. These findings underscore the need for addressing psychosocial stressors and sleep quality in developing effective care for HIV-infected individuals who experience fatigue.

The psychological impact of dependency in adults with chronic fatigue syndrome/myalgic encephalomyelitis: A qualitative exploration

Chronic fatigue syndrome/myalgic encephalomyelitis can limit functional capacity, producing various degrees of disability and psychological distress. Semi-structured interviews explored the experiences of adults with chronic fatigue syndrome/myalgic encephalomyelitis being physically dependent on other people for help in daily life, and whether physical dependency affects their psychological well-being. Thematic analysis generated six themes: loss of independence and self-identity, an invisible illness, anxieties of today and the future, catch-22, internalised anger, and acceptance of the condition. The findings provide insight into the psychological impact of dependency. Implications for intervention include better education relating to chronic fatigue syndrome/myalgic encephalomyelitis for family members, carers, and friends; ways to communicate their needs to others who may not understand chronic fatigue syndrome/myalgic encephalomyelitis; and awareness that acceptance of the condition could improve psychological well-being.

Can the Fatigue Severity Scale 7-item version be used across different patient populations as a generic fatigue measure--a comparative study using a Rasch model approach

BACKGROUND

Fatigue is a disabling symptom associated with reduced quality of life in various populations living with chronic illnesses. The transfer of knowledge about fatigue from one group to another is crucial in both research and healthcare. Outcomes should be validly and reliably comparable between groups and should not be unduly influenced by diagnostic variations. The present study evaluates whether the Fatigue Severity Scale 7-item version (FSS-7) demonstrates similar item hierarchy across people with multiple sclerosis, stroke or HIV/AIDS to ensure valid comparisons between groups, and provide further evidence of internal scale validity.

METHODS

A secondary comparative analysis was performed using data from three different studies of three different chronic illnesses: multiple sclerosis, stroke and HIV/AIDS. Each of these studies had previously concluded that the FSS-7 has better psychometric properties than the original FSS for measuring fatigue interference. Data from 224 people with multiple sclerosis, 104 people with stroke and 316 people with HIV/AIDS were examined. Item response theory and a Rasch model were chosen to analyze the similarity of the FSS-7 item hierarchy across the three diagnostic groups

RESULTS

Cross-sample differences were found for items #3, #5, #6 and #9 for two of the three samples, which raise questions about item validity across groups. However, disease-specific and disease-generic Rasch measures were similar across samples, indicating that individual fatigue interference measures in these three chronic illnesses might still be reliably comparable using the FSS-7.

CONCLUSIONS

Some items performed differently between the three samples but did not bias person measures, thereby indicating that fatigue interference in these illnesses might still be reliably compared using FSS-7 scores. However, caution is warranted when comparing fatigue raw sum scores directly across diagnostic groups using the FSS-7. Further studies of the scale are needed in other types of chronic illnesses.

Fatigue in HIV and AIDS: an analysis of evidence

HIV-related fatigue continues to be the most common complaint of infected people. No physiological factors have been consistent predictors for fatigue; psychosocial factors, particularly depression, have emerged more consistently in studies. While clinicians would want to rule out common causes of fatigue such as hypothyroidism, hypogonadism, or anemia, there is scant research for most interventions, which makes it difficult to make definitive recommendations for their use. Modafinil has the strongest research evidence to date, with multiple studies finding it effective in relieving fatigue. However, researchers must continue to pursue ways to ameliorate fatigue in HIV infection, given the high financial, personal, and social costs suffered by people experiencing it.

Lack of energy: an important and distinct component of HIV-related fatigue and daytime function

CONTEXT

Fatigue is a prevalent symptom among adults living with HIV. There is increasing evidence that fatigue and energy are related, yet distinct constructs. Although HIV-related fatigue has been well studied, little is known about perceived energy and how it relates to fatigue, individual characteristics, and other symptoms.

OBJECTIVES

To describe the experience of perceived energy in adults with HIV and evaluate its relationship to demographic and clinical characteristics as well as symptoms of fatigue, sleep disturbance, anxiety, depression, and daytime function.

METHODS

The design was descriptive, comparative, and correlational. The sample of 318 adults with HIV completed a demographic questionnaire; the Memorial Symptom Assessment Scale; and measures of fatigue, sleep disturbance, anxiety, depressive symptoms, and daytime function. Medical records were reviewed for disease and treatment data. Participants who reported a lack of energy were compared with those who did not on demographic, clinical, and symptom variables. Regression models of perceived energy and its interference with daytime function also were evaluated.

RESULTS

Perceived lack of energy was highly prevalent (65%) and more strongly related to interference with daytime function than more general measures of fatigue severity, even when controlling for other characteristics and symptoms. Like other aspects of fatigue, lack of energy was associated with sleep disturbance, anxiety, and depressive symptoms. Lack of energy was more strongly related to morning fatigue than to evening fatigue.

CONCLUSION

Lack of energy interferes with daytime function and is not just the inverse of fatigue but a distinct perception that differs from fatigue.

A 7-item version of the fatigue severity scale has better psychometric properties among HIV-infected adults: an application of a Rasch model

PURPOSE

To examine the psychometric properties of the 9-item Fatigue Severity Scale (FSS) using a Rasch model application.

METHODS

A convenience sample of HIV-infected adults was recruited, and a subset of the sample was assessed at 6-month intervals for 2 years. Socio-demographic, clinical, and symptom data were collected by self-report questionnaires. CD4 T-cell count and viral load measures were obtained from medical records. The Rasch analysis included 316 participants with 698 valid questionnaires.

RESULTS

FSS item 2 did not advanced monotonically, and items 1 and 2 did not show acceptable goodness-of-fit to the Rasch model. A reduced FSS 7-item version demonstrated acceptable goodness-of-fit and explained 61.2% of the total variance in the scale. In the FSS-7 item version, no uniform Differential Item Functioning was found in relation to time of evaluation or to any of the socio-demographic or clinical variables.

CONCLUSION

This study demonstrated that the FSS-7 has better psychometric properties than the FSS-9 in this HIV sample and that responses to the different items are comparable over time and unrelated to socio-demographic and clinical variables.

Physiological and psychosocial factors that predict HIV-related fatigue

Fatigue is one of the most common and debilitating symptoms experienced by HIV-infected people. We report the results of our longitudinal analysis of physiological and psychosocial factors that were thought to predict changes in HIV-related fatigue in 128 participants over a 1-year period, in an effort to sort out the complex interplay among a comprehensive set of physiological and psychosocial variables. Physiological measures included hepatic function (aspartate aminotransferase, alanine aminotransferase, gamma glutamyl transpeptidase, alkaline phosphatase, total bilirubin, hepatitis C status), thyroid function (thyroid stimulating hormone, thyroxine), HIV viral load, immunologic function (CD4, CD8, CD4/CD8 ratio, CD16, CD8CD38), gonadal function (testosterone, dehydroepiandrosterone), hematologic function (hemoglobin, hematocrit, serum erythropoietin), and cellular injury (lactic acid). Psychosocial measures included childhood and adult trauma, anxiety, depression, social support, stressful life events, and post-traumatic stress disorder (PTSD). Unemployment, not being on antiretroviral therapy, having fewer years since HIV diagnosis, more childhood trauma, more stressful life events, less social support, and more psychological distress (e.g., PTSD, anxiety and depression) put HIV-infected persons at risk for greater fatigue intensity and fatigue-related impairment in functioning during 1-year follow-up. Physiological variables did not predict greater fatigue. Stressful life events had both direct and indirect effects on fatigue.

Predictors and treatment strategies of HIV-related fatigue in the combined antiretroviral therapy era

OBJECTIVE

To assess predictors and reported treatment strategies of HIV-related fatigue in the combined antiretroviral (cART) era.

METHOD

Five databases were searched and reference lists of pertinent articles were checked. Studies published since 1996 on predictors or therapy of HIV-related fatigue measured by a validated instrument were selected.

RESULTS

A total of 42 studies met the inclusion criteria. The reported HIV-related fatigue prevalence in the selected studies varied from 33 to 88%. The strongest predictors for sociodemographic variables were unemployment and inadequate income. Concerning HIV-associated factors, the use of cART was the strongest predictor. Comorbidity and sleeping difficulties were important factors when assessing physiological influences. Laboratory parameters were not predictive of fatigue. The strongest and most uniform associations were observed between fatigue and psychological factors such as depression and anxiety. Reported therapeutic interventions for HIV-related fatigue include testosterone, psycho-stimulants (dextroamphetamine, methylphenidate hydrochloride, pemoline, modafinil), dehydroepiandrosterone, fluoxetine and cognitive behavioural or relaxation therapy.

CONCLUSION

HIV-related fatigue has a high prevalence and is strongly associated with psychological factors such as depression and anxiety. A validated instrument should be used to measure intensity and consequences of fatigue in HIV-infected individuals. In the case of fatigue, clinicians should not only search for physical mechanisms, but should question depression and anxiety in detail. There is a need for intervention studies comparing the effect of medication (antidepressants, anxiolytics) and behavioural interventions (cognitive-behavioural therapy, relaxation therapy, graded exercise therapy) to direct the best treatment strategy. Treatment of HIV-related fatigue is important in the care for HIV-infected patients and requires a multidisciplinary approach.

Potential Pitfalls in Collecting and Analyzing Longitudinal Data from Chronically Ill Populations

Research on the prevention and management of chronic illnesses involves understanding changes in complex and interrelated aspects of each individual. To capture these changes or to control for them, nursing and health research needs to be longitudinal. However, there are a number of potential pitfalls in analyzing longitudinal data from a chronically ill population. This paper will examine four major pitfalls: selection of time points, measurement, choosing appropriate statistical procedures, and missing values. Although the frequency of data collection is often driven primarily by practical concerns, it will affect the results. In addition, outcome measures may capture different constructs at different points in times. Traditional analysis techniques often have assumptions about data characteristics that are violated in clinical populations. Missing values are common in research with chronically ill individuals because of problems of subject retention and because individuals have frequent medical complications. Solutions to these pitfalls are also discussed.

Trauma, stressful life events and depression predict HIV-related fatigue

Despite the fact that fatigue is a common and debilitating symptom among HIV-infected persons, we know little about the predictors of fatigue in this population. The goal of this cross-sectional study was to examine the effects of early childhood trauma, recent stressful life events and depression on intensity and impairment of fatigue in HIV, over and above demographic factors and clinical characteristics. We studied 128 HIV-infected men and women from one southern state. The median number of childhood traumatic events was two and participants tended to have at least one moderate recent stressful event. Multiple regression findings showed that patients with less income, more childhood trauma, more recent stressful events and more depressive symptoms had greater fatigue intensity and fatigue-related impairment in daily functioning. Recent stresses were a more powerful predictor of fatigue than childhood trauma. None of the disease-related measures (e.g. CD4, viral load, antiretroviral medication) predicted fatigue. Although stress and trauma have been related to fatigue in other populations, this is the first study to examine the effects of traumatic and recent stressful life events on fatigue in an HIV-infected sample.

HIV-positive smokers considering quitting: differences by race/ethnicity

OBJECTIVE

To better characterize smoking in HIV-positive individuals and to identify critical components of a targeted smoking cessation intervention for multiethnic HIV-positive smokers.

METHODS

Differences in baseline characteristics of 444 HIV-positive smokers were examined by race, and a multivariate linear regression model evaluated factors associated with nicotine dependence in an HIV-positive population, with a particular emphasis on race/ethnic differences.

RESULTS

Low smoking self-efficacy and higher contemplation of quitting were predictive of greater nicotine dependence. An interaction between age and race was noted, with older Hispanic Americans less likely to be nicotine dependent.

CONCLUSIONS

Efforts should be made to tailor smoking cessation intervention content to HIV-positive racial/ethnic minority groups.

The experience of fatigue for adults living with HIV

AIMS

The aim of this study was to go beyond objective clinical assessment and explore the experience of fatigue and self-care strategies with adults who live with HIV.

RATIONALE

This study responded to a perceived lack of available evidence to inform the practice of service providers about ways fatigue impacts on the lives of people with HIV. Prior understandings of fatigue are derived from survey or instrument-based tools or studies that do not consider the complexities of the personal experience that in-depth interviews can elicit. The focus remains generally on description, measurement or management from a biomedical perspective.

METHODS

A qualitative study using participatory action research methods was conducted during 2003 with 15 adults diagnosed with HIV who perceived fatigue was a problem in their lives. Data were collected by individual interviews, researcher's notes and two participatory action research groups.

RESULTS

Thematic analysis of data demonstrated that fatigue remains silent and invisible to participant's families, friends and employers. Fatigue experienced by people living with HIV generally also met with a lack of acknowledgement and understanding from health professionals. People developed self-care strategies over many years of trial and error.

RELEVANCE TO CLINICAL PRACTICE

People living with a HIV seek to be acknowledged that fatigue is a legitimate concern, not only by health care professionals, but also people with whom they live. It is imperative that nurses who work with people living with HIV-related fatigue consider the wider social aspects of the person's life as well as physical symptoms. Most importantly, there then needs to be a process of engagement and active listening to the individual's account of their experience of fatigue. Advocating that fatigue is a legitimate complaint to the person living with HIV as well as the wider public and professional community is imperative.

Theories of fatigue: application in HIV/AIDS

A number of theoretical fatigue frameworks have been developed by nurse scientists with the intention of guiding research, practice, and education in fatigue. However, there is a significant gap between theory development and research utilization of fatigue frameworks in clinical and intervention trials. The purpose of this report is to assess an example of an inductive fatigue framework and a deductive symptom management model: The Integrated Fatigue Model (IFM) and the revised University of California, San Francisco, Symptom Management Model (UCSF-SMM), to investigate their potential to guide future nursing research projects on fatigue. The IFM is a fatigue-specific comprehensive framework of 14 biological and psychosocial patterns that influence signs and symptoms of fatigue and trigger six fatigue dimensions. The developers emphasized that patterns could be interrelated and influence the dimensionality of fatigue. The UCSF-SMM is a multidimensional symptom management model embedded within the three nursing domains: person, environment, and health and illness. The model places symptom perceptions, symptom management strategies, and outcomes within these nursing domains to be the key components of a highly complex symptom management process. The IFM is an important development in the understanding and conceptualization of fatigue in cancer and in HIV/AIDS. However, it does not reach the level of integration of the UCSF-SMM in taking fatigue research a significant step forward by integrating symptom impact, symptom management, and symptom outcomes. Both models have significant weaknesses because of their complexity.

Fatigue among HIV-infected patients in the era of highly active antiretroviral therapy

OBJECTIVE

To describe the prevalence of operationally defined fatigue in an ethnically diverse HIV-infected population in south London, and to examine the association of fatigue with demographic characteristics, stage of disease, antiretroviral therapy and psychological factors.

METHODS

A descriptive comparative cross-sectional study of HIV-infected patients attending a London HIV clinic over a 5-month period in 2002 was performed. Demographic and clinical data were obtained from the local database. Participants completed four self-administered questionnaires-the Chalder Fatigue Scale (CFS), a measure of physical and mental fatigue; the General Health Questionnaire (GHQ-12) to detect anxiety and depression; the Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36) to measure functional status, and the Illness Perception Questionnaire (IPQ). Fatigue 'cases' were defined as those scoring at least 4 on the CFS. Multivariate logistic regression was used to identify factors associated with the presence of fatigue.

RESULTS

Two hundred and five patients were approached and 148 (72%) agreed to participate. Overall, 65% of patients were defined as fatigued. Significant psychological distress on the GHQ-12, functional impairment on the SF-36 and a higher CD4 count were all independently associated with the presence of fatigue. There was no association with use of antiretroviral therapy or demographic characteristics.

CONCLUSIONS

The presence of fatigue in HIV-infected patients is most strongly associated with psychological factors and not with more advanced HIV disease or the use of highly active antiretroviral therapy. This highlights the importance of investigation and management of underlying depression and anxiety in patients presenting with fatigue.

Women's experiences of fatigue in chronic illness

AIM

The aim of this paper is to add a qualitative dimension to the body of knowledge about fatigue by revealing the meaning given by women living with chronic illness to the experience of fatigue.

BACKGROUND

Fatigue is a common symptom experienced by people who live with chronic illness. It pervades every aspect of life and may be experienced in physical, psychological, emotional or social dimensions. Management of fatigue relies heavily on the individual's ability to employ self-care actions. The invisibility of fatigue is recognized as one of the most frustrating aspects, which can lead to lack of understanding and misunderstanding by others.

METHOD

We report the findings of data from research in progress (2003-2005). Data were generated via email group conversations between us and 30 women who live with long-term illness.

FINDINGS

A recurring conversational thread has been women's experiences of fatigue when living with long-term illness. Although fatigue has been reported to be a major obstacle to maintaining usual daily activities and quality of life, few studies have explored this common symptom from the perspective of people themselves. Common themes found in the experience of fatigue as described by women are the meaning of fatigue, awareness as self-care, fatigue as invisible to others, seeking medical validation and accountability for self-care.

CONCLUSION

It is vital for healthcare workers to give opportunities for women to talk about fatigue, validate their experiences and provide support with self-care. Healthcare workers are encouraged to challenge their own meanings and expectations surrounding a person's report of fatigue so that opportunities for therapeutic intervention can be facilitated.

Insomnia in HIV infection: a systematic review of prevalence, correlates, and management

OBJECTIVE

Insomnia in people with HIV and AIDS has been widely but inconsistently reported. We present the results of a systematic review of the subject.

METHODS

MEDLINE, EMBASE, PSYCHLIT, and CINAHL databases were searched, and inclusion criteria were applied. The study results were then collated and described.

RESULTS

Twenty-nine studies were identified, and there was wide variation in both method and quality. Insomnia was reported frequently and at all stages of HIV infection. Early reports of sleep-specific electroencephalographic changes were not confirmed. The role of immune dysregulation, virus progression, and adverse drug effects in contributing to insomnia is unclear. The presence of cognitive impairment, an AIDS-defining illness, and treatment with efavirenz were found to be significant risk factors, but the most notable association was with psychologic morbidity. There was limited evidence for the effect of specific treatments for insomnia in HIV infection.

CONCLUSIONS

This review found that psychologic morbidity was a major determinant of insomnia in HIV infection. Further study would be of value in clarifying the role of other factors, as well as measuring the impact of insomnia on functioning and quality of life in this population.