CLINHAQ scale - Validation of a Hebrew version in patients with fibromyalgia

Assessment of health status in patients with rheumatic disease, including fibromyalgia (FM), using structured questionnaires has become an important approach to evaluate treatment and outcome. The objectives of this study were to validate a translated version of the Clinical Health Assessment Questionnaire (CLINHAQ) to be used by Hebrew-speaking populations, and specifically to evaluate its usefulness in fibromyalgia syndrome (FM). The CLINHAQ was translated into Hebrew and administered to 90 women with FM along with the Hebrew versions of the Fibromyalgia Impact Questionnaire (FIQ) and the Quality of Life (QOL) Scale. The CLINHAQ includes scales of functional disability, helplessness, anxiety and depression, as well as assessment of current health status and satisfaction with this. All subjects were asked about the presence and severity (assessed by visual analogue scale) of current FM symptoms (pain, fatigue, anxiety etc.); a count of 18 tender points was conducted by thumb palpation, and tenderness thresholds were measured by dolorimetry. Test-retest reliability was assessed by Pearson correlation coefficients, and internal consistency was evaluated with Cronbach's α coefficient of reliability. Construct validity was tested by correlating the CLINHAQ items with measures of symptom severity, count of tender point, tenderness thresholds, physical functioning measured by FIQ, and with a score of QOL. Test-retest reliability coefficients ranged from 0.82 to 0.99, and Cronbach's α coefficients from 0.725 to 0.929. Significant moderate to high correlations were obtained between most subscales of CLINHAQ and measures of physical functioning, quality of life and severity of FM symptoms. In conclusion, the CLINHAQ is a reliable and valid instrument for measuring health status and physical functioning in Israeli women with FM.