Tradução e Validação da versão portuguesa da escala pediátrica de sintomas do trato urinário inferior PLUTSS

Abstract

Introduction: About 20% of school-aged children have symptoms of lower urinary tract dysfunction (LUTD). LUTD is frequently associated with bowel dysfunction, urinary tract infections, neuropsychiatric conditions, and is a cause of anxiety in children and their families. Scoring symptoms scales can be important in the diagnosis and follow-up. The PLUTSS is a questionnaire with 14 questions about urinary symptoms, bowel movements and quality of life, for children with 4 to 10 years old. Our goal was to translate and validate the Portuguese version of PLUTSS. Materials and Methods: After the translation and cultural adaptation, PLUTSS was applied to 44 children with LUTD and 64 controls. Construct validity was evaluated with a principal component analysis (PCA), internal consistency was evaluated with Cronbach's alpha and the reliability was measured with the Intraclass Correlation Coefficient (ICC). The ROC curve was used to determine the optimal cut-off and the ability to discriminate between cases and controls. Results: The total mean was 16.5 ±5.23 in cases and 3.54 ±2.71 in controls (p<0.001). The PCA identified a component that explained 32.4% of the total variance. The global standardize Cronbach's alpha was 0.81. The ICC was 0.99 (p<0.01). The area under the ROC curve was 0.990 (0.978-1.000). The cut-off of 8.5 points presents 97.6% sensibility and 95.2% specificity. Discussion: After the translation and adaptation, good cultural and functional equivalence was obtained. The Portuguese version of PLUTSS has good reliability, reproducibility, and high power to detected LUTD in children. Conclusion: The PLUTSS Portuguese version is valid.