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