title: Direct and self-reported measures of physical activity and sedentary behaviours by weight status in school-aged children: results from ISCOLE-Kenya.
abstract: BACKGROUND
  Previous work has shown little association between self-report and directly measured physical activity. The objective of this study was to investigate the relationships between self-reported and directly assessed measures of physical activity and sedentary time by weight status in Kenyan children.
  
  
  METHODS
  Direct assessment of body weight, physical activity and sedentary time of 563 children was collected through anthropometry and accelerometry, while self-reported assessment was achieved by administering a questionnaire.
  
  
  RESULTS
  Under/healthy weight children had significantly higher directly measured mean daily minutes of moderate-to-vigorous physical activity (MVPA) compared to overweight/obese children (39 vs 20 minutes); had lower mean weekend-day minutes of sedentary time (346 vs 365 minutes); had a higher proportion who met accepted physical activity guidelines (15.3% vs 2.6%); and a higher number reported using active transportation to/from school (49.2% vs 32.4%). Self-reported time spent outside before and after school and active transport to/from school were significantly associated with mean weekday minutes of MVPA (r-value range = 0.12-0.36), but only for the under/healthy weight children.
  
  
  CONCLUSIONS
  The results of this study found a number of differences in the accumulation of MVPA and sedentary time by weight status and weak-to-moderate correlations between self-report and direct measures of weekday and weekend-day physical activity among the under/healthy weight children.
authors.affiliation: Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario , Canada .
authors.forename: Stella K
authors.initials: SK
authors.lastname: Muthuri
authors.forename: Lucy-Joy M
authors.initials: LJ
authors.lastname: Wachira
authors.forename: Vincent O
authors.initials: VO
authors.lastname: Onywera
authors.forename: Mark S
authors.initials: MS
authors.lastname: Tremblay
mesh_terms: D061725:Accelerometry; D000886:Anthropometry; D001835:Body Weight; D002648:Child; D005260:Female; D006801:Humans; D007630:Kenya; D008297:Male; D009043:Motor Activity; D057185:Sedentary Behavior; D057566:Self Report
keywords: Children; direct-measures; physical activity; sedentary behaviours; self-report