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

Lerdal, Anners; Kottorp, Anders; Aouizerat, Bradley E.; Portillo, Carmen J.; Lee, Kathryn A.

doi:10.1007/s11136-011-9877-8

Cited by 46 publications

(49 citation statements)

References 44 publications

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“…As in similar previous studies [28], a Rasch model was chosen to analyze the SOC subscales as the items are intended to represent different aspects of the sense of coherence that are assumed to vary in challenge among adults with IBD. The Rasch model takes each item score and adjusts the final person measure based on relative differences in item challenge [29–31].…”

Section: Methodsmentioning

confidence: 99%

Psychometric limitations of the 13-item Sense of Coherence Scale assessed by Rasch analysis

Lerdal¹,

Opheim²,

Gay³

et al. 2017

BMC Psychol

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BackgroundA person’s sense of coherence (SOC) reflects their perception that the world is meaningful and predictable, and impacts their ability to deal with stressors in a health-promoting manner. A valid, reliable, and sensitive measure of SOC is needed to advance health promotion research based on this concept. The 13-item Sense of Coherence Scale (SOC-13) is widely used, but we reported in a previous evaluation its psychometric limitations when used with adults with morbid obesity. To determine whether the identified limitations were specific to that population or also generalize to other populations, we have replicated our prior study design and analysis in a new sample of adults with inflammatory bowel disease (IBD).MethodsA sample of 428 adults with IBD completed the SOC-13 at a routine clinic visit in Norway between October 1, 2009 and May 31, 2011. Using a Rasch analysis approach, the SOC-13 and its three subscales were evaluated in terms of rating scale functioning, internal scale validity, person-response validity, person-separation reliability and differential item functioning.ResultsCollapsing categories at the low end of the 7-category rating scale improved its overall functioning. Two items demonstrated poor fit to the Rasch model, and once they were deleted from the scale, the remaining 11-item scale (SOC-11) demonstrated acceptable item fit. However, neither the SOC-13 nor the SOC-11 met the criteria for unidimensionality or person-response validity. While both the SOC-13 and SOC-11 were able to distinguish three groups of SOC, none of the subscales could distinguish any such groups. Minimal differential item functioning related to demographic characteristics was also observed.ConclusionsAn 11-item version of the sense of coherence scale has better psychometric properties than the original 13-item scale among adults with IBD. These findings are similar to those of our previous evaluation among adults with morbid obesity and suggest that the identified limitations may exist across populations. Further refinement of the SOC scale is therefore warranted.

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Section: Methodsmentioning

confidence: 99%

Psychometric limitations of the 13-item Sense of Coherence Scale assessed by Rasch analysis

Lerdal¹,

Opheim²,

Gay³

et al. 2017

BMC Psychol

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“…The Fatigue Severity Scale (FSS) assesses the impact of perceived energy deficit and fatigue over the past week (30) and is accepted for use as an indicator of daytime function (12, 31). Findings from recent studies in patients with stroke (32) and patients with HIV (12) indicate that a seven-item version of the FSS has better psychometric properties, thus the seven-item version (FSS-7) was used.…”

Section: Methodsmentioning

confidence: 99%

“…Findings from recent studies in patients with stroke (32) and patients with HIV (12) indicate that a seven-item version of the FSS has better psychometric properties, thus the seven-item version (FSS-7) was used. Each item is rated from 1 (strongly disagree) to 7 (strongly agree), and the seven items are averaged to yield a score from 1 (no functional problems because of fatigue or lack of energy) to 7 (unable to function because of fatigue or lack of energy).…”

Section: Methodsmentioning

confidence: 99%

“…For example, the Lee Fatigue Scale consists of separate fatigue and energy subscales (10), and the Profile of Mood States includes a subscale measuring fatigue-inertia and a subscale for vigor-activity (11). A recent Rasch analysis of Lee’s Visual Analogue Scale–Fatigue indicated that fatigue and energy represented different constructs in a sample of women living with HIV (12). …”

Section: Introductionmentioning

confidence: 99%

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Lack of Energy: An Important and Distinct Component of HIV-Related Fatigue and Daytime Function

Aouizerat

Lerdal

Portillo

et al. 2013

Journal of Pain and Symptom Management

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Context Fatigue is a prevalent symptom among adults living with human immunodeficiency virus (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.

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“…Response-centered scaling increases the accuracy of measurement, providing an estimate of the concept, as opposed to the total score. This increased precision of measurement translates into fewer items that are more specific to the person, based on his or her response to the previous item (Lerdal et al, 2011). …”

Section: Development and Validationmentioning

confidence: 99%

Patient-Reported Outcomes Measurement Information System (PROMIS): Efficient, standardized tools to measure self-reported health and quality of life

2014

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All nurses are interested in the effects of diseases and treatments on individuals. Patient reported outcome (PRO) measures are used to obtain self-reported information about symptoms, function, perceptions, and experiences. However, there are challenges to their use, including multiple measures of the same concept, widely varying quality, excessive length and complexity, and difficulty comparing findings across studies and conditions. To address these challenges, the National Institutes of Health funded the Patient-Reported Outcomes Measurement Information System (PROMIS®), a web-based repository of valid and reliable PRO measures of health concepts relevant to clinician and researchers. Through the PROMIS Assessment Center, clinicians and researchers can access PRO measures, administer computerized adaptive tests, collect self-report data, and report instant health assessments. The purpose of this paper is to summarize the development and validation of the PROMIS measures and to describe its current functionality as it relates to nursing science.

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

Abstract: 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.

Cited by 46 publications

References 44 publications

Psychometric limitations of the 13-item Sense of Coherence Scale assessed by Rasch analysis

Psychometric limitations of the 13-item Sense of Coherence Scale assessed by Rasch analysis

Lack of Energy: An Important and Distinct Component of HIV-Related Fatigue and Daytime Function

Patient-Reported Outcomes Measurement Information System (PROMIS): Efficient, standardized tools to measure self-reported health and quality of life

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