BACKGROUND: Cognitive-behavioural models of @entity1118 predict that dysfunctional assumptions about harmfulness of activities may maintain @entity158 -related fear and disability. To assess perceived harmfulness in adolescents, the Photograph Series of Daily Activities for youth (PHODA-youth) was developed. Information concerning its methodological quality is currently lacking. OBJECTIVE: To investigate psychometric characteristics (factor structure, test-retest reliability, construct validity) and feasibility of the PHODA-youth in adolescents with chronic @entity4512 . STUDY DESIGN: Test-retest design. STUDY POPULATION: Adolescents aged 13-21 years with chronic nonspecific @entity4512 . METHODS: @entity1 filled in an electronic version of the PHODA-youth including 89 items twice with a 4-week interval. The instrument's factor structure was determined by a factor analysis. Construct validity was studied with criterion variables: catastrophizing (Pain Catastrophizing Scale for @entity1 ), @entity158 intensity (visual analogue scale), @entity308 ( @entity1 's @entity308 Inventory) and @entity158 (Functional Disability Inventory) using regression analysis. Test-retest reliability was evaluated based on the Pearson correlation coefficient. Feasibility was studied with self-constructed questions. RESULTS: Seventy-one adolescents participated. Results show a three-factor structure for the PHODA-youth including 51 items with subscales labelled as: 'activities of daily life', 'intensive physical activities' and 'social activities'. Total and subscale scores showed a high internal consistency. Its test-retest reliability was good (r   =   0.94) and its construct validity is supported by the finding that both catastrophizing (b   =   0.25; p   =   0.02) and disability (b   =   0.71; p   <   0.001) were uniquely related to the PHODA-youth. In addition, feasibility appeared adequate. CONCLUSION: The findings support the PHODA-youth as a valid and reliable measure of the perceived harmfulness of activities in adolescents with @entity4512 .

The psychometric characteristics of an assessment instrument for perceived harmfulness in adolescents with XXXX (PHODA-youth).

@entity4512 :: ('MESH:D059352', 'Disease') :: ['musculoskeletal pain'] @entity1 :: ('9606', 'Species') :: ['Children', 'Participants'] @entity308 :: ('MESH:D003866', 'Disease') :: ['Depression', 'depression'] @entity158 :: ('MESH:D010146', 'Disease') :: ['pain-related disability', 'pain'] @entity1118 :: ('MESH:D059350', 'Disease') :: ['chronic pain']
@entity4512 :: (MESH:D059352,Disease) :: ['musculoskeletal pain']
