Reprodutibilidade e validade do questionário Baecke para avaliação da atividade física habitual em adolescentes.

 

Dartagnan P. Guedes

Cynthia C. Lopes

Joana E. R. P. Guedes

Luiz C. Stanganelli

Centro de Educação Física e Desporto, Universidade Estadual de Londrina, Paraná, Brasil.

 

RESUMO

O objetivo do estudo foi analisar indicadores associados à reprodutibilidade e à validade do Questionário de Atividade Física Habitual preconizado por Baecke (BQHPA) em amostra específica de adolescentes. A amostra foi constituída por 161 sujeitos (92 moças e 69 rapazes) com idades entre 12 e 18 anos. Reprodutibilidade foi obtida por intermédio de réplicas de aplicação do questionário, com intervalo de duas semanas, envolvendo o coeficiente de correlação intraclasse (R) e a técnica de Bland e Altman (B-A). A validade foi analisada mediante comparações entre as informações apresentadas pelos adolescentes no BQHPA e por instrumento retrospectivo de auto-recordação das atividades diárias (R-24h). Para tanto, utilizou-se da proporção de concordância Kappa entre categorizações de acordo com a distribuição de quartis dos indicadores de atividade física. Os achados revelaram R entre 0,55 e 0,85 nas moças e entre 0,69 e 0,82 nos rapazes. Embora esses valores sejam semelhantes aos encontrados em outros estudos, mediante a técnica de B-A verifica-se limitada capacidade de concordância entre réplicas de aplicação do questionário. Quanto à validade, os escores de atividade física apresentados pelo BQHPA demonstraram proporção de concordância entre 33,5% e 76,6% com as informações provenientes do R-24h. Os indicadores de validação observados foram mais elevados entre os rapazes com mais idade. Em conclusão, os resultados apresentam evidências de que, em adolescentes de ambos os sexos com mais de 14 anos de idade, o BQHPA demonstra aceitáveis propriedades de medida para monitorar níveis habituais de atividade física. Em adolescentes mais jovens ( ≤ 14 anos), os achados sugerem que o BQHPA deverá ser utilizado com algumas precauções.

Palavras-chave: mensuração, avaliação, métodos, precisão, exatidão.

 

ABSTRACT

Reproducibility and validity of the Baecke questionnaire for assessing of the habitual physical activity in adolescents.

The present study was designed to analyze the reproducibility and validity of Baecke Questionnaire of Habitual Physical Activity (BQHPA) in specific sample of adolescents. A total of 161 subjects (92 girls and 69 boys) aged 12-17 years old were included in the study. For the assessment of reproducibility intraclass correlation coefficients and Bland-Altman plots were computed between administrations of the questionnaire at baseline, and after two weeks. Validity was determined by comparing questionnaire against a 24-hour recall instrument of the daily activities, which provided an estimate of the diary energy expenditure (kcal/kg/day). Proportion of agreement (kappa values) was calculated, based on categorization of the distributions of the physical activity variables into quartiles. The results showed correlation coefficients ranged from 0,55 to 0,85 in girls and 0,69 to 0,82 in boys. Although these data are comparable to most other self-report reproducibility studies, Bland-Altman plots demonstrated limited capacity of agreement between test-retest of the questionnaire. In terms of validity, the scores of physical activity reported in the BQHPA showed percentage of agreement between 33,5% and 76,6% with the 24-hour recall data. The indicators of validation observed were greater in boys older. In conclusion, these data provide evidence that, in adolescents of both sex with more than 14 years old, the BQHPA has acceptable measurement properties for monitoring levels of habitual physical activity. In youngest adolescents (≤ 14 years old), our findings indicate that the BQHPA should be used with some precautions.

Key-words: measurement, evaluation, methods, accuracy, reliability, validation.

 

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CORRESPONDÊNCIA

Dartagnan Pinto Guedes

Rua Ildefonso Werner 177

Condomínio Royal Golf

CEP 86001-970 – Londrina – Paraná

E-mail: darta@sercomtel.com.br