Validation of the Turkish version of the fatigue severity scale in patients with fibromyalgia

Abstract

The aim of the study was to investigate the validity and reliability of the Turkish version of the fatigue severity scale (FSS) in fibromyalgia (FM) patients. Sixty-one FM patients and 54 healthy controls were evaluated using the Turkish version of the FSS. Reliability was investigated using test-retest reliability and internal consistency. Concurrent validity was evaluated between the FSS score and the VAS fatigue. Convergent validity was assessed by comparing the FSS score with the scores of VAS pain, Beck Depression Inventory (BDI), Beck Anxiety Inventory (BAI), and Fibromyalgia Impact Questionnaire (FIQ). Spearman's rank correlation coefficient was used to evaluate validity. Test-retest reliability and internal consistency of the FSS were excellent in FM patients (ICC: 0.94, Cronbach's alpha coefficient: 0.85) and in the healthy controls (ICC: 0.90, Cronbach's alpha coefficient: 0.91). For the concurrent validity, the correlation between the FSS and VAS fatigue was very good in FM group (r: 0.63, P: 0.000) and in the healthy controls (r: 0.94, P: 0.000). For the convergent validity, correlations between the FSS and BDI, BAI, FIQ, pain intensity were moderate to good in both groups (P: 0.000). The Turkish version of the FSS has been proved to be valid and reliable to detect severity of fatigue in FM patients. We recommend the use of it in clinical practice.

Disease Activity in Turkish Patients with Behçet's Disease: Association with Fatigue, Psychological Status and Quality of Life

“…12,13 The severity of pain was measured by 100 mm Visual Analog Scale-Pain (VASpain). 14 Written informed consent was obtained from all of the patients.…”

Disease Activity (Rheumatoid Arthritis Disease Activity Index-5) in Patients With Rheumatoid Arthritis and its Association With Quality of Life, Pain, Fatigue, and Functional and Psychological Status

“…10 Psychological status was assessed by using Beck Depression Scale, 11 and fatigue by Fatigue Severity Scale. 12 Disease activity was measured by using the quadrivariate disease activity score-28 (DAS28), 3 and RADAI-5. 6 Rheumatoid Arthritis Disease Activity Index-5 is a 5-item, self-administered RA-specific questionnaire that assesses global disease activity in last six months and current disease activity in terms of joint swelling and tenderness, pain, duration of morning stiffness and general health.…”

Cognitive Complaints in Patients with Fibromyalgia Versus Older-Aged Women: Case Control Study

“…It consists of 9 statements that are scored on a 7-point Likert scale, ranging from 1 (strongly disagree) to 7 (strongly agree) a total score is calculated as the mean score of the 9 statements [16]. A lower total score indicates less effect of fatigue on everyday life [16]. Depressive symptoms in all of the groups were obtained from the Beck Depression Inventory (BDI) [17].…”

“…Higher scores indicate greater pain severity [15]. For a global assessment of fatigue severity, we used a validated Turkish version of Fatigue severity scale in patients with FM(FSS) [16]. It consists of 9 statements that are scored on a 7-point Likert scale, ranging from 1 (strongly disagree) to 7 (strongly agree) a total score is calculated as the mean score of the 9 statements [16].…”