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Discriminant and co...
Discriminant and convergent validity of the GSRS-IBS symptom severity measure for irritable bowel syndrome : A population study
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- Ljótsson, Brjánn (författare)
- Karolinska Institutet
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Jones, Michael (författare)
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Talley, Nicholas J. (författare)
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Kjellström, Lars (författare)
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- Agréus, Lars (författare)
- Karolinska Institutet
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- Andreasson, Anna (författare)
- Karolinska Institutet,Stockholms universitet,Stressforskningsinstitutet,Macquarie University, Australia; Karolinska Institutet, Sweden
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(creator_code:org_t)
- 2020-04
- 2020
- Engelska.
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Ingår i: United European Gastroenterology journal. - : Wiley. - 2050-6406 .- 2050-6414. ; 8:3, s. 284-292
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- Background: The Gastrointestinal Symptom Rating Scale-Irritable Bowel Syndrome (GSRS-IBS) is a 13-item measure of IBS symptom severity. The scale has been used in several studies, but its psychometric properties have been insufficiently investigated and population-based data are not available.Objective: The objective of this article is to establish the factor structure and discriminant and convergent validity of the GSRS-IBS.Methods: The study was based on a Swedish population sample (the Popcol study), of which 1158 randomly selected participants provided data on the GSRS-IBS. We used confirmatory factor analysis (CFA) and compared total and subscales scores in different groups, including IBS diagnostic status, treatment-seeking behavior, and predominant bowel habits. The GSRS-IBS scores were also correlated with quality of life indexes.Results: The sample included 164 participants with a confirmed Rome III IBS diagnosis and 994 participants without the disease. The CFA confirmed the subscales with one exception, in which the incomplete bowel-emptying item belonged to the constipation subscale rather than the diarrhea subscale. The GSRS-IBS total score and subscales were associated with diagnostic status, treatment-seeking behavior, and quality of life dimensions. The relevant subscales scores also differed between the diarrhea- and constipation-predominant subtypes of IBS.Conclusion: The GSRS-IBS total score and subscales have high discriminant and convergent validity. The CFA confirmed the overall validity of the subscales but suggest that a sense of incomplete emptying belongs to the constipation rather than the diarrhea symptom cluster. We conclude that the GSRS-IBS is an excellent measure of IBS symptom severity in the general population.
Ämnesord
- SAMHÄLLSVETENSKAP -- Psykologi (hsv//swe)
- SOCIAL SCIENCES -- Psychology (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Gastroenterologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Gastroenterology and Hepatology (hsv//eng)
Nyckelord
- irritable bowel syndrome
- patient-reported outcomes
- population study
- psychometric evaluation
- symptom severity
- Psychology
- psykologi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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