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Titre de l’article	Evaluating the extent of pain in adolescents: preliminary results on test-retest reliability
Code d’article	P11
Auteurs	Anna Folli SUPSI (University of Applied Sciences and Arts of Southern Switzerland) Deborah Falla University of Birmingham, United Kingdom Corrado Cescon University of Applied Sciences and Arts of Southern Switzerland Federica Vanoni Clinic of pediatrics, Pediatric Institute of Southern Switzerland, EOC, Bellinzona, Switzerland; Università della Svizzera Italiana, Lugano, Switzerland; Emiliano Soldini SUPSI Marco Barbero University of Applied Sciences and Arts of Southern Switzerland Conférencier
Forme de présentation	Poster
Domaines thématiques	2. Pratiques professionnelles et pédagogiques innovantes
Résumé (Abstract)	Background: A Pain Drawing (PD) is a self-administered pain assessment that requires the person who completes it to colour in on a body chart the areas in which he or she experiences pain, regardless of the intensity. PDs can be analysed by digitally extracting the coloured area and assessing the spatial spread of pain (pain extent) and localising it with respect to an anatomical grid (pain location). Clinicians can use these data to document the patient’s pain history, to assess the evolution of a patient's symptoms or to evaluate their response to provocative tests. Although body charts are included in several questionnaires for pain assessment of children and adolescents, no one has investigated the reliability of adolescents in reporting the extent and location of pain via a PD. Therefore, the aim of this study is to establish the test-retest reliability of adolescents in reporting the extent of their pain using a PD. Methods: Adolescents with pain of musculoskeletal origin and aged 11-16 years were included. All participants were asked to colour the areas where they had had pain in the last week. After the administration of a questionnaire and the acquisition of further personal data (requiring at least 10 minutes), the PD was administered again. The PDs were then scanned and analysed using a digital platform, which allowed the extraction of pain extent values on which the test-retest reliability was calculated. Intraclass Correlation Coefficient (ICC2,1) and Bland Altman analysis were used to assess respectively relative and absolute test-retest reliability. Results: Currently, 17 adolescents out of the 40 required by the sample size calculation were included. The analysis of the 17 included participants resulted in excellent ICC2,1: 0.99 (95% CI: 0.98- 1.00). The Bland Altman analysis showed a mean difference close to zero: -0.01 (limits of agreements -0.44 to 0.43). Conclusions: Preliminary analysis of the data extracted from the first 17 participants of this ongoing study shows that adolescents with pain of musculoskeletal origin are reliable in reporting the extent of their pain with PDs.