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Potential correlates common to MVPA, Sleep duration, and ST.
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Sex
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Parent-reported
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Binary variable: male or female (covariate)
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Age
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Parent-reported
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Continuous (covariate)
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BMI z-score
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Objectively measured
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Continuous
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School commute (mode of transport to and from school for main part of the journey)
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Participant-reported
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Re-coded as dichotomous: active (walking, bicycle / rollerblade / skateboard / scooter), or passive (bus / train / boat / car / motorcycle / moped)
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Outdoor time (before school, after school, weekend)
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Participant-reported
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Continuous
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Participation in sports
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Participant-reported
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Re-coded as dichotomous: (did not participate in sporting activities) or (participated in sporting activities) in the past year
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Self-perceived health
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Participant-reported
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Re-coded as dichotomous: (poor, fair) or (good, very good, excellent)
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Parental level of education
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Parent-reported
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Re-coded as highest level of parental education (covariate): <high school, high school/some college, or bachelor’s/graduate degree
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Mother’s work status
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Parent-reported
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Continuous: re-coded as dichotomous (≤15 h/week) or (> 15 h/week)
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Father’s work status
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Parent-reported
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Continuous: recoded as dichotomous (≤15 h/week) or (> 15 h/week)
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School location
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School-Administrator-reported
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Binary: urban or rural (covariate)
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Number of televisions in the house
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Parent-reported
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Continuous: re-coded as categorical: 0 or 1 or ≥ 2
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Number of functional cars at home
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Parent-reported
|
Continuous: re-coded as categorical: 0 or 1 or ≥ 2
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Number of siblings for participant
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Parent-reported
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Continuous: recoded as dichotomous ≤2 or ≥ 3
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Crime rate in the neighbourhood
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Parent-reported
|
Re-coded as dichotomous: “disagreed/strongly disagreed”, and “agreed/strongly agreed”
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Trust people in the community
|
Parent-reported
|
Re-coded as dichotomous: “disagreed/strongly disagreed”, and “agreed/strongly agreed”
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Correlates specific to MVPA
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School physical activity policies
|
School-Administrator-reported
|
Binary: yes/no
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|
Mother’s BMI
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Parent-reported
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Continuous: re-coded as dichotomous < 25 or ≥ 25
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|
Father’s BMI
|
Parent-reported
|
Continuous: re-coded as dichotomous < 25 or ≥ 25
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Sleep duration
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Accelerometer measured
|
Continuous
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Recreational screen time
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Participant-reported
|
Continuous
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Correlates specific to Sleep duration
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|
Recreational screen time
|
Participant-reported
|
Continuous
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Moderate-to-vigorous-intensity physical activity
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Accelerometer measured
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Continuous: re-coded as dichotomous (< 60 min per day) or (≥60 min per day)
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Correlates specific to ST
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|
Sleep duration
|
Accelerometer measured
|
Continuous
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MVPA
|
Accelerometer measured
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Continuous: re-coded as dichotomous (< 60 min per day) or (≥60 min per day)
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Consumption of fast-food
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Participant-reported
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Re-coded as dichotomous: (eats fast food ≤3 times per week) or (eats fast food > 3 times per week)
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Consumption of fried food
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Participant-reported
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Re-coded as dichotomous: (eats fried food ≤3 times per week) or (eats fried food > 3 times per week)
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Consumption of fast food while watching television
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Participant-reported
|
Re-coded as dichotomous: (does not eat fast food while watching television) or (eats fast food while watching television at least once per week)
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