title: Reliability of the Brazilian version of the Physical Activity Checklist Interview in children.
abstract: OBJECTIVE
  To assess the reliability of the Lista de Atividades Físicas (Brazilian version of the Physical Activity Checklist Interview) in children.
  
  
  METHODS
  The study is part of a cross-cultural adaptation of the Physical Activity Checklist Interview, conducted with 83 school children aged between seven and ten years, enrolled between the 2nd and 5th grades of primary education in the city of São Paulo, Southeastern Brazil, in 2008. The questionnaire was responded by children through individual interviews. It is comprised of a list of 21 moderate to vigorous physical activities performed on the previous day, it is divided into periods (before, during and after school) and it has a section for interview assessment. This questionnaire enables the quantification of time spent in physical and sedentary activities and the total and weighed metabolic costs. Reliability was assessed by comparing two interviews conducted with a mean interval of three hours. For the interview assessment, data from the first interview and those from an external evaluator were compared. Bland-Altman's proposal, the intraclass correlation coefficient and Lin's concordance correlation coefficient were used to assess reliability.
  
  
  RESULTS
  The intraclass correlation coefficient lower limits for the outcomes analyzed varied from 0.84 to 0.96. Precision and agreement varied between 0.83 and 0.97 and between 0.99 and 1, respectively. The line estimated from the pairs of values obtained in both interviews indicates high data precision. The interview item showing the poorest result was the ability to estimate time (fair in 27.7% of interviews). Interview assessment items showed intraclass correlation coefficients between 0.60 and 0.70, except for level of cooperation (0.46).
  
  
  CONCLUSIONS
  The Brazilian version of the Physical Activity Checklist Interview shows high reliability to assess physical and sedentary activity on the previous day in children.
authors.affiliation: Programa de Pós-Graduação em Saúde Pública, Faculdade de Saúde Pública, Universidade São Paulo, São Paulo, SP, Brazil.
authors.forename: Fernando
authors.initials: F
authors.lastname: Adami
authors.forename: Fernanda
authors.initials: F
authors.lastname: Cruciani
authors.forename: Michelle
authors.initials: M
authors.lastname: Douek
authors.forename: Carolina Dumit
authors.initials: CD
authors.lastname: Sewell
authors.forename: Aline Brandão
authors.initials: AB
authors.lastname: Mariath
authors.forename: Patrícia de Fragas
authors.initials: Pde F
authors.lastname: Hinnig
authors.forename: Silvia Rafaela Mascarenhas
authors.initials: SR
authors.lastname: Freaza
authors.forename: Denise Pimentel
authors.initials: DP
authors.lastname: Bergamaschi
mesh_terms: D001938:Brazil; D002648:Child; D003431:Cross-Cultural Comparison; D003466:Cultural Characteristics; D005260:Female; D006801:Humans; D007407:Interviews as Topic / Q000592:standards*; D008297:Male; D009043:Motor Activity / Q000502:physiology*; D011594:Psychometrics; D015203:Reproducibility of Results; D017678:Sex Distribution; D011795:Surveys and Questionnaires / Q000592:standards*; D013997:Time Factors