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Psychometric properties of the Fibromyalgia Assessment Status (FAS) index: a national web-based study of fibromyalgia.
Clin Exp Rheumatol. 2011 Nov-Dec; 29(6 Suppl 69):S49-54.CE

Abstract

Fibromyalgia (FM) is a generalized chronic pain condition that is often accompanied by symptoms such as fatigue, sleep disturbances, psychological and cognitive alterations, headache, migraine, variable bowel habits, diffuse abdominal pain, and urinary frequency. Its key assessment domains include pain, fatigue, disturbed sleep, physical and emotional functioning, and patient global satisfaction and health-related quality of life (HRQL). A number of evaluation measures have been adapted from the fields of rheumatoid arthritis, psoriatic arthritis and ankylosing spondylitis, and others such as the Fibromyalgia Assessment Status (FAS) index and the Fibromyalgia Impact Questionnaire (FIQ) have been specifically developed. The aim of this study was to assess the impact of FM on HRQL by comparing the performance of the FAS index, the FIQ and the Health Assessment Questionnaire [HAQ] in 541 female and 31 male FM patients (mean age 50 years; mean disease duration 7.7 years) entered in the database of a web-based survey registry developed by the Italian Fibromyalgia Network (IFINET). Tests of convergent validity showed that the FAS index and FIQ significantly correlated with each other (rho=0.608, p<0.0001), but there were also significant correlations between the FAS index and other clinical measures of disability, including the HAQ (rho=0.423, p<0.0001), anxiety (rho=0.138, p=0.0009), depression (rho=0.174, p<0.0001) and, especially, the number of comorbidities (rho=0.147, p=0.0004). The FAS index revealed a statistically significant difference between males and females (p=0.048), analysed using the Mann-Whitney U-test for all pair wise comparisons. The FAS index is a valid three-item instrument (pain, fatigue and sleep disturbances) that performs at least as well as the FIQ in FM patients, and is simpler to administer and score. Both questionnaires may be useful when screening FM patients, with the choice of the most appropriate instrument depending on the setting.

Authors+Show Affiliations

La Sapienza University, Rome, Italy.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

22011656

Citation

Iannuccelli, C, et al. "Psychometric Properties of the Fibromyalgia Assessment Status (FAS) Index: a National Web-based Study of Fibromyalgia." Clinical and Experimental Rheumatology, vol. 29, no. 6 Suppl 69, 2011, pp. S49-54.
Iannuccelli C, Sarzi-Puttini P, Atzeni F, et al. Psychometric properties of the Fibromyalgia Assessment Status (FAS) index: a national web-based study of fibromyalgia. Clin Exp Rheumatol. 2011;29(6 Suppl 69):S49-54.
Iannuccelli, C., Sarzi-Puttini, P., Atzeni, F., Cazzola, M., di Franco, M., Guzzo, M. P., Bazzichi, L., Cassisi, G. A., Marsico, A., Stisi, S., & Salaffi, F. (2011). Psychometric properties of the Fibromyalgia Assessment Status (FAS) index: a national web-based study of fibromyalgia. Clinical and Experimental Rheumatology, 29(6 Suppl 69), S49-54.
Iannuccelli C, et al. Psychometric Properties of the Fibromyalgia Assessment Status (FAS) Index: a National Web-based Study of Fibromyalgia. Clin Exp Rheumatol. 2011;29(6 Suppl 69):S49-54. PubMed PMID: 22011656.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Psychometric properties of the Fibromyalgia Assessment Status (FAS) index: a national web-based study of fibromyalgia. AU - Iannuccelli,C, AU - Sarzi-Puttini,P, AU - Atzeni,F, AU - Cazzola,M, AU - di Franco,M, AU - Guzzo,M P, AU - Bazzichi,L, AU - Cassisi,G A, AU - Marsico,A, AU - Stisi,S, AU - Salaffi,F, Y1 - 2012/01/03/ PY - 2010/10/05/received PY - 2011/04/07/accepted PY - 2011/10/21/entrez PY - 2011/10/21/pubmed PY - 2012/3/28/medline SP - S49 EP - 54 JF - Clinical and experimental rheumatology JO - Clin. Exp. Rheumatol. VL - 29 IS - 6 Suppl 69 N2 - Fibromyalgia (FM) is a generalized chronic pain condition that is often accompanied by symptoms such as fatigue, sleep disturbances, psychological and cognitive alterations, headache, migraine, variable bowel habits, diffuse abdominal pain, and urinary frequency. Its key assessment domains include pain, fatigue, disturbed sleep, physical and emotional functioning, and patient global satisfaction and health-related quality of life (HRQL). A number of evaluation measures have been adapted from the fields of rheumatoid arthritis, psoriatic arthritis and ankylosing spondylitis, and others such as the Fibromyalgia Assessment Status (FAS) index and the Fibromyalgia Impact Questionnaire (FIQ) have been specifically developed. The aim of this study was to assess the impact of FM on HRQL by comparing the performance of the FAS index, the FIQ and the Health Assessment Questionnaire [HAQ] in 541 female and 31 male FM patients (mean age 50 years; mean disease duration 7.7 years) entered in the database of a web-based survey registry developed by the Italian Fibromyalgia Network (IFINET). Tests of convergent validity showed that the FAS index and FIQ significantly correlated with each other (rho=0.608, p<0.0001), but there were also significant correlations between the FAS index and other clinical measures of disability, including the HAQ (rho=0.423, p<0.0001), anxiety (rho=0.138, p=0.0009), depression (rho=0.174, p<0.0001) and, especially, the number of comorbidities (rho=0.147, p=0.0004). The FAS index revealed a statistically significant difference between males and females (p=0.048), analysed using the Mann-Whitney U-test for all pair wise comparisons. The FAS index is a valid three-item instrument (pain, fatigue and sleep disturbances) that performs at least as well as the FIQ in FM patients, and is simpler to administer and score. Both questionnaires may be useful when screening FM patients, with the choice of the most appropriate instrument depending on the setting. SN - 0392-856X UR - https://www.unboundmedicine.com/medline/citation/22011656/Psychometric_properties_of_the_Fibromyalgia_Assessment_Status__FAS__index:_a_national_web_based_study_of_fibromyalgia_ L2 - http://www.clinexprheumatol.org/pubmed/find-pii.asp?pii=22011656 DB - PRIME DP - Unbound Medicine ER -