Quality of Life of Adolescents: development and Validation of an Instrument with Students from the Esporte Cidadao Project--Indaiatuba Sports Secretariat / Qualidade de Vida de Adolescentes: desenvolvimento e validacao de instrumento, com alunos do Projeto Esporte Cidadao--Secretaria de Esportes de Indaiatuba/Sao Paulo

Adolescence is a crucial phase in human development, encompassing biological, psychological, and social aspects, representing a period of change and preparation for adulthood. The objective of this study was to develop and validate an instrument to assess the lifestyle of adolescents, based on biopsychosocial indicators. After theoretical development, the instrument was administered to 1,289 adolescents aged 12 to 17. Reliability and validity analyses were conducted using Cronbach's alpha coefficient and factor analysis. The instrument consisted of 51 items across the following dimensions: Eating Habits, Physical Activity, Sleep and Rest, Personal Well-being, Leisure and Entertainment, Stress Management, Preventive Behavior, and Social Relationships. The factor analysis, using loadings above 0.50, suggested the exclusion of 18 items, and the Cronbach's alpha value was 0.802, indicating good internal consistency. The final instrument comprised eight domains and 33 items, demonstrating satisfactory psychometric properties of reliability and validity, thus serving as an important research tool. Adolescencia e uma fase importante no desenvolvimento humano nos aspectos biologico, psicologico e social, um periodo de mudancas e preparacao da vida adulta. O objetivo deste estudo foi desenvolver e validar um instrumento para avaliar o estilo de vida de adolescentes, baseado em indicadores biopsicossociais. Instrumento composto por 51 itens nas dimensoes: Habitos Alimentares; Atividade Fisica; Sono e Repouso; Bem-estar Pessoal; Lazer e Diversao; Controle do Stress; Comportamento Preventivo; Relacionamento Social. Analise Fatorial, utilizando cargas acima de 0.50, sugeriu a exclusao de 18 itens e o valor do Alfa de Cronbach foi de 0.802, demonstrando boa consistencia interna.