Validity and reliability of the Patient Health Questionnaire-8 in Swedish for individuals with systemic sclerosis

• DOI: 10.1007/s00296-020-04641-1
• Publication Date: 2020-07-13T20:02:31Z
• Authors: Malin Mattsson; Gunnel Sandqvist; Roger Hesselstrand; Annica Nordin; Carina Boström
• Keywords: Ceiling effect; Patient Health Questionnaire

Abstract Background Depressive symptoms are common in rheumatic diseases and influence patients’ quality of life. The Patient Health Questionnaire-9 (PHQ-9), which assesses depression, is valid English patients with systemic sclerosis (SSc). However, the measurement properties PHQ-8 (short version PHQ-9) have not been evaluated Swedish SSc. Objective To investigate different aspects validity reliability (PHQ-8 Swe) for individuals Methods A total 101 SSc participated. Content was via interviews 11 10 health professionals. Construct validity, internal consistency test–retest reliability, floor/ceiling effects were 90 patients. Results satisfactory, but some linguistic adjustments made. Confirmatory factor analysis supported a better fit two-factor structure. Moderate-to-strong correlations found between Swe scleroderma HAQ including VAS ( r s = 0.4–0.7); Multidimensional Assessment Fatigue 0.7); RAND-36 subscales − 0.5 to 0.8); lung disease severity (Medsger scores) 0.4). There weak <0.4) modified Rodnan skin score; vascular, heart, kidney severity. Cronbach’s alpha 0.85, corrected item-to-total >0.40, ICC score 0.83. No found. Conclusion has satisfactory content sufficient majority limited It more strongly associated self-reported disability, pain, interferences daily activities, fatigue, life than severity, except moderate association