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Fibromyalgia 2016 criteria and assessments: comprehensive validation in a Norwegian population.
Scand J Pain. 2020 Jun 30 [Online ahead of print]SJ

Abstract

Background and aims The ACR1990 criteria of fibromyalgia (FM) have been criticized due to poor reliability of tender points counting (TPC), inconsistent definitions of the widespread pain, and by not considering other symptoms than pain in the FM phenotype. Therefore, several newer self-report measures for FM criteria have emerged. The aim of this study was to translate the fibromyalgia survey questionnaire (FSQ) to Norwegian and validate both the 2011 and the 2016 fibromyalgia survey diagnostic criteria (FSDC) against the ACR1990 criteria. Methods One hundred and twenty chronic pain patients formerly diagnosed with fibromyalgia according to the ACR1990 criteria, and 62 controls not diagnosed or where fibromyalgia was not suspected, were enrolled in this study. All responded to a Norwegian version of the FSQ. Also, they had a clinical examination according to ACR1990 fibromyalgia criteria including a counting of significant tender points with an algometer (TPC). The FSQ with the Widespread Pain Index (WPI) and Symptom Severity scale (SSS) subscales, Fibromyalgia Severity (FS) sum score, was examined for correlations with the fibromyalgia impact questionnaire (FIQ) and TPCs. Face-validity, internal consistence, test-retest reliability and construct validity with convergent and divergent approaches were examined and a Receiver Operating Characteristics (ROC) analysis was performed. Results The internal consistency of FS measured by Cronbach's alfa was good (=0.904). The test-retest reliability measures using intra class correlation were respectable for the FS, including WPI and SSS subscales (0.86, 0.84 and 0.87). FS, WPI and SSS correlated significantly with FIQ (0.74, 0.59 and 0.85) and TPC indicating an adequate construct, convergent validity. The medians of FS, WPI and SSS in the fibromyalgia-group were significantly different from the non-fibromyalgia-group indicating good construct, divergent validity. Using the 2011 and 2016 FSDC vs. ACR 1990 as a reference, sensitivity, specificity, positive likelihood ratio (LR +) and negative likelihood ratio (LR-) were identified. The accuracy rate for both 2011 and 2016 FSDC were respectable (84%). ROC analysis using FS revealed a very good Area Under the Curve (AUC) = 0.860. Conclusion The current study revealed that the Norwegian versions of FSQ is a valid tool for assessment of fibromyalgia according to the 2011 and 2016 (FSDC).

Authors+Show Affiliations

Faculty of Medicine and Health Sciences, Department of Public Health and Nursing, General Practitioner Research Unit, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway, Phone: +4741236597.Research Unit for General Practice, NORCE Norwegian Research Centre, Bergen, Norway.Science Centre Health and Technology, Faculty of Health and Social Sciences, University of South-Eastern Norway, Drammen, Norway.Norwegian University of Science and Technology, Trondheim, Norway. St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway.Chronic Pain and Fatigue Research Center, University of Michigan Health System, Ann Arbor, Michigan, USA. Department of Anesthesiology, University of Michigan Health System, Ann Arbor, Michigan, USA.Forward, the National Data Bank for Rheumatic Diseases, Wichita, KS, USA. University of Kansas School of Medicine, Wichita, KS, USA.Faculty of Medicine and Health Sciences, Department of Public Health and Nursing, General Practitioner Research Unit, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32609652

Citation

Fors, Egil A., et al. "Fibromyalgia 2016 Criteria and Assessments: Comprehensive Validation in a Norwegian Population." Scandinavian Journal of Pain, 2020.
Fors EA, Wensaas KA, Eide H, et al. Fibromyalgia 2016 criteria and assessments: comprehensive validation in a Norwegian population. Scand J Pain. 2020.
Fors, E. A., Wensaas, K. A., Eide, H., Jaatun, E. A., Clauw, D. J., Wolfe, F., & Helvik, A. S. (2020). Fibromyalgia 2016 criteria and assessments: comprehensive validation in a Norwegian population. Scandinavian Journal of Pain. https://doi.org/10.1515/sjpain-2020-0002
Fors EA, et al. Fibromyalgia 2016 Criteria and Assessments: Comprehensive Validation in a Norwegian Population. Scand J Pain. 2020 Jun 30; PubMed PMID: 32609652.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Fibromyalgia 2016 criteria and assessments: comprehensive validation in a Norwegian population. AU - Fors,Egil A, AU - Wensaas,Knut-Arne, AU - Eide,Hilde, AU - Jaatun,Ellen A, AU - Clauw,Daniel J, AU - Wolfe,Fred, AU - Helvik,Anne-Sofie, Y1 - 2020/06/30/ PY - 2019/12/20/received PY - 2020/05/05/accepted PY - 2020/7/2/entrez PY - 2020/7/2/pubmed PY - 2020/7/2/medline KW - 2016 survey and diagnostic criteria KW - Norwegian KW - fibromyalgia KW - questionnaire KW - validity JF - Scandinavian journal of pain JO - Scand J Pain N2 - Background and aims The ACR1990 criteria of fibromyalgia (FM) have been criticized due to poor reliability of tender points counting (TPC), inconsistent definitions of the widespread pain, and by not considering other symptoms than pain in the FM phenotype. Therefore, several newer self-report measures for FM criteria have emerged. The aim of this study was to translate the fibromyalgia survey questionnaire (FSQ) to Norwegian and validate both the 2011 and the 2016 fibromyalgia survey diagnostic criteria (FSDC) against the ACR1990 criteria. Methods One hundred and twenty chronic pain patients formerly diagnosed with fibromyalgia according to the ACR1990 criteria, and 62 controls not diagnosed or where fibromyalgia was not suspected, were enrolled in this study. All responded to a Norwegian version of the FSQ. Also, they had a clinical examination according to ACR1990 fibromyalgia criteria including a counting of significant tender points with an algometer (TPC). The FSQ with the Widespread Pain Index (WPI) and Symptom Severity scale (SSS) subscales, Fibromyalgia Severity (FS) sum score, was examined for correlations with the fibromyalgia impact questionnaire (FIQ) and TPCs. Face-validity, internal consistence, test-retest reliability and construct validity with convergent and divergent approaches were examined and a Receiver Operating Characteristics (ROC) analysis was performed. Results The internal consistency of FS measured by Cronbach's alfa was good (=0.904). The test-retest reliability measures using intra class correlation were respectable for the FS, including WPI and SSS subscales (0.86, 0.84 and 0.87). FS, WPI and SSS correlated significantly with FIQ (0.74, 0.59 and 0.85) and TPC indicating an adequate construct, convergent validity. The medians of FS, WPI and SSS in the fibromyalgia-group were significantly different from the non-fibromyalgia-group indicating good construct, divergent validity. Using the 2011 and 2016 FSDC vs. ACR 1990 as a reference, sensitivity, specificity, positive likelihood ratio (LR +) and negative likelihood ratio (LR-) were identified. The accuracy rate for both 2011 and 2016 FSDC were respectable (84%). ROC analysis using FS revealed a very good Area Under the Curve (AUC) = 0.860. Conclusion The current study revealed that the Norwegian versions of FSQ is a valid tool for assessment of fibromyalgia according to the 2011 and 2016 (FSDC). SN - 1877-8879 UR - https://www.unboundmedicine.com/medline/citation/32609652/Fibromyalgia_2016_criteria_and_assessments:_comprehensive_validation_in_a_Norwegian_population L2 - https://linkinghub.elsevier.com/retrieve/pii//j/sjpain.ahead-of-print/sjpain-2020-0002/sjpain-2020-0002.xml DB - PRIME DP - Unbound Medicine ER -
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