Ryan J Collinson, Darren Boey, Lynne Wilson, Zi Yun Ng, Bob Mirzai, Hun Chuah, Michael F Leahy, Rebecca Howman, Matthew Linden, Kathy Fuller, Wendy N Erber, Belinda B Guo
PlateletSeq: A novel method for discovery of blood-based biomarkers
Methods (San Diego, Calif.)
assess association amount recess provision childrens accelerometermeasured physical activity pa levels parentsguardians 6 11yearolds n 451 2012 national youth fitness survey reported recess provision categorized low 1015 min 319 medium 1630 min 480 high 30 min 201 children wore wristworn accelerometer 7 days estimate time spent sedentary light pa moderate vigorous pa using 2 different cut points either activity counts raw acceleration outcomes compared levels recess provision adjusting covariates surveys multistage probability sampling design children high recess provision spent less time sedentary irrespective type day week vs weekend engaged light moderate vigorous pa weekdays low recess provision magnitude statistical significance effects differed based cut points used classify pa eg 47 vs 119 additional mind1 moderate vigorous pa providing children 30 minutes daily recess exceeds current recommendations 20 minutes associated favorable pa levels school days identifying optimal method analyzing wristworn accelerometer data could clarify magnitude effect