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The calculated physical activity indices were then age-standardized to ensure the data were comparative between the two groups.
47 48 We calculated physical activity energy expenditure using the resultant intensity time series data, 49 and added this as a continuous covariate into all models related to body weight.
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Accelerometer data obtained during the 24 h period following exercise were used to calculate physical activity level (PAL) applying the equation by Bonomi et al. [ 20].
Leisure time physical activity was assessed by the Paffenbarger questionnaire (17), and a previously published algorithm (18) was used to calculate physical activity over the past week and over the past year based on the daily number of city block equivalents walked, the number of flights of stairs climbed, and the frequency and duration of leisure time activity.
To estimate physical activity, we calculated an average daily metabolic equivalent task hours index.
Odds ratios will be calculated for physical activity (level), satisfaction with trial treatment, and adverse events.
# Metabolic equivalent (MET) hours per week calculated from physical activity level outside school hours.
# Metabolic equivalent (MET) hours per week calculated from physical activity outside school hours.
Group means and standard deviations (SDs) were calculated for physical activity and sedentary time, and percentages for screen time.
# Metabolic equivalent (MET) hours per week calculated from physical activity outside school hours; mean value at 16 and 19 years.
Hazard ratios (HRs) and 95% confidence intervals (95% CIs) were calculated by physical activity quantiles (quartile or tertile distributions in the cohort).
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