The validity and reliability of the Turkish version of the Fear of Pain Questionnaire for Children-Short Form (FOPQC-SF) in children and adolescents with juvenile idiopathic arthritis

Objective: The aim of this study was to investigate the validity and reliability of the Turkish version of the Fear of Pain Questionnaire for Children-Short Form (FOPQC-SF) in children/adolescents with juvenile idiopathic arthritis (JIA). Methods: To evaluate validity of FOPQC-SF, 70 children/adolescents with JIA were included. Data were collected using Pediatric Quality Of Life Inventory 3.0. Module Arthritis (PedsQL), Childhood Health Assessment Questionnaire (CHAQ) and Juvenile Arthritis Disease Activity Score (JADAS).To determine the reliability of the FOPQC-SF, test-retest was performed at one-week intervals on participants who had not made any changes to their pharmacological treatment and had not received any additional treatment. Results: With factor restrictions, items of Turkish version of FOPQC-SF were found acceptable for a 2-factor structure (fear:4 items; avoidance:6 items)(RMSEA = 0.058, GFI = 0.890, X2 = 40.667 X2/df = 1.196). With no restrictions, items of Turkish version of FOPQC-SF were found to be excellent for a 3-factor structure (fear:3 items; avoidance:4 items; other:3 items) (RMSEA = 0.036, GFI = 0.909, X2 = 34.465, X2/df = 1.077).The Cronbach's alpha value of Turkish version of FOPQC-SF total was 0.865 (good). The intraclass correlation coefficient (ICC2,1) was 0.865 (very high). Fear and avoidance subscales and total score of Turkish version of FOPQC-SF had low to moderate correlation with CHAQ-disability index, CHAQ-pain, CHAQ-global evaluation, JADAS, PedsQL-child total, PedsQL-parent total (r:-0.283/-0.452)(p < 0.05). Other subscale of Turkish version of FOPQC-SF had low to moderate correlation with CHAQ-disability index, CHAQ-pain, PedsQL-parent total (r:0.286/0.318) (p < 0.05). Conclusion: The Turkish version of FOPQC-SF was found to be clinically valid and reliable in children and adolescents with JIA.