Reliability of a sedentary behavior questionnaire in students
DOI:
https://doi.org/10.5020/18061230.2018.7332Keywords:
Reproducibility of Results, Surveys and Questionnaires, Sedentary Lifestyle, Students.Abstract
Objective: To evaluate the reliability of a sedentary behavior questionnaire. Methods: Cross-sectional study with 1,119 students from 9 to 15 years old from seven public schools in Curitiba, Paraná, Brazil, between March and December 2015. The questionnaire consists of 13 items divided into five aspects (screen time, educational, cultural, social and transportation) in which the participants reported time spent in sedentary activities (hours and/or minutes) in a typical week. For the reliability analysis, two applications of the questionnaire were performed and the intraclass correlation coefficient evaluated the reproducibility, Bland–Altman scatter plot assessed the concordance between the two test-retest measurements, and Cronbach's alpha, the internal consistency of the questionnaire, adopting 5% as significance level. Results: The intraclass correlation coefficient and Cronbach's alpha presented values greater than 0.70, being higher on weekdays than on weekends. The two applications of the questionnaire presented a mean difference of 228.27 minutes/week, with 95% confidence interval of 175.86 to 280.68. The limits of agreement ranged from 2,015.33 to -1,558.79 minutes/week. Conclusion: The questionnaire presented satisfactory reliability and can be used to measure sedentary behavior in students from 9 to 15 years old of public schools.Downloads
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