Psychometric properties of Turkish version of Jenkins sleep scale in fibromyalgia syndrome

Abstract

Background: Fibromyalgia syndrome (FMS) has adverse effects on the quality of sleep. The aim of this study was to investigate the validity and reliability of Jenkins Sleep Scale (JSS-TR) in Turkish FMS patients. Methods: FMS patients who met the 2016 fibromyalgia diagnostic criteria were included in the study. Clinical and demographic data of the patients were noted. The relationship between this scale and other functional parameters such as Pittsburgh Sleep Quality Index (PSQI), European Quality of Life Scale-5 Dimensions (EQ-5D), Fatigue Severity Scale (FSS), Beck Depression Inventory (BDI) was examined. Fibromyalgia Impact Questionnaire (FIQ) was used to evaluate the functional status of the patients and the progression of the disease. Test-retest reliability was calculated by re-applying the questionnaire to patients at 2-week intervals. Duloxetine treatment was initiated in newly diagnosed patients and sensitivity to change was tested at the end of the treatment. Spearman correlation coefficient was used. P < 0.05 was accepted as significant.Results: Eighty-one FMS patients (71 females, 10 males) were included in the study. The mean age was 44.2 ± 10.7 years. The strongest correlation of JSS-TR was with another sleep questionnaire, PSQI (rho = 0.79, p < 0.0005). The correlation with other functional parameters and FIQ was moderate. In test-retest validity, intraclass correlation coefficient was found to be 0.98 (p < 0.0005). Chronbach α value calculated for internal consistency was found to be 0.741. Conclusions: JSS-TR is a valid, simple and feasible sleep instrument that can be easily applied to FMS patients both in researches and clinical settings.

Internal consistency and factor structure of Jenkins Sleep Scale: cross-sectional cohort study among 80 000 adults

“…The results are in line with several previous studies that have found the JSS to be a unidimensional scale with excellent internal consistency 3 6 8. The Cronbach’s alpha of 0.8 seen in the present study was close to the estimates reported by previous research in both general population and populations of people with different health conditions 2 3 5–11 15 16. While the JSS has been studied by employing alpha and EFA by several studies, a confirmatory factor analysis has previously been used by only a single study (Tibubos et al ).…”

“…Previous studies have found the JSS to be internally consistent among patients with fibromyalgia,5 11 rheumatoid arthritis,10 ankylosing spondylitis7 and psoriatic arthritis9 as indicated by Cronbach’s alphas between 0.7 and 0.9. Several studies have assessed the internal consistency of the JSS in general and/or healthy populations similarly reporting good to excellent Cronbach’s alphas that vary between 0.8 and 0.9 2 3 6 8 15 16.…”

“…That is unlike to more complex scales, like Insomnia Severity Index, which quantify also the impact of sleep disturbance on the level of daily functioning. The JSS has been translated in several languages5–10 and found to be valid and reliable among patients with different health problems including rheumatoid arthritis,10 psoriatic arthritis,9 ankylosing spondylitis,7 fibromyalgia,5 11 chest pain,12 post-cardiac surgery patients,2 patients with cognitive disorders13 and epilepsy 14. However, only a few studies have evaluated the psychometric properties of the JSS in large non-clinical populations 2 3 8 15 16…”

A Review of Turkish Self-Reporting Instruments for Sleep Problems in Children, Adolescents, and Adults

“…The JSS has been adapted to many languages and tested psychometric properties in clinical populations such as rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, fibromyalgia, and epilepsy. 20 Ulutatar and Unubol 21 adapted JSS to the Turkish language in fibromyalgia patients and showed adequate psychometric properties (Cronbach α = 0.741).…”

The Association Between Sleep Quality, Fatigue and Periodontal Status: a Pilot Study

“…Total scores vary between 0 and 20, and higher scores demonstrate a higher number of sleep problems. Sleep disorders are considered when the average score is greater than or equal to 2, corresponding to a minimum of one problem night per week (36).…”