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Table 2 Potential correlates of meeting the combined movement guidelines

From: Prevalence and correlates of adherence to the combined movement guidelines among Czech children and adolescents

  Method of measurement Measurement/Question Use in analysis
Biological and cognitive
 Sex Self-reported Sex. Binary variable:
girl (1) or boy (0a)
 School achievement Self-reported Did you pass with distinction on your final school report in the previous school year? Binary variable: yes (1) or no (0a)
 Adiposity Device-measured Assessed by multi-frequency bioimpedance analysis. Re-coded as dichotomous:  < 85th percentile (1a) or ≥ 85th percentile (0)
 BMI z-score Anthropometric measurement World Health Organization BMI z-score based on direct measurement of body height and weight. Re-coded as dichotomous:  < 1 SD (1a) or ≥ 1 SD (0)
Behavioral
 Organized PA Self-reported About how many hours a week do you usually spend in organized sport activities in your free time on weekdays/weekend days? Re-coded as dichotomous:  ≥ 1 h a week (1) or < 1 h a week (0a)
 Active play Self-reported About how many hours a day do you usually spend in unorganized PA in your free time on weekdays/weekend days? Re-coded as dichotomous: ≥ 2 h a day (1) or < 2 h a day (0a)
 AT to school Self-reported Check the prevailing mode (walk, bicycle, in-line, skateboard, car, bus, train) of transportation on the way to school. Re-coded as dichotomous:  ≥ 3 days a week of AT (1) or < 3 days a week of AT (0a)
 AT from school Self-reported Check the prevailing mode (walk, bicycle, in-line, skateboard, car, bus, train) of transportation on the way from school. Re-coded as dichotomous:  ≥ 3 days a week of AT (1) or < 3 days a week of AT (0a)
 Sleep efficiency Device-measured Measured by accelerometry and defined as the ratio of time spent in sustained inactivity periods divided by sleep duration. Re-coded as dichotomous:  ≥ 0.85 (1) or < 0.85 (0a)
 Fruit and vegetable intake Self-reported About how many times a week do you usually eat or drink a) fruits and b) vegetables? Re-coded as dichotomous:  ≥ 1 day a week (1) or < 1 day a week (0a) for “a” and “b”
 Unhealthy snacking Self-reported About how many times a week do you usually eat or drink c) sweets (candy or chocolate), d) coke or other soft drinks that contain sugar, and e) crisps, chips, salt sticks, etc.? Re-coded as dichotomous:  ≥ 1 day a week (1) or < 1 day a week (0a) for “c”, “d” or “e”
 Skipping breakfast Self-reported How often do you usually have breakfast (more than a glass of milk or fruit juice) on weekdays/weekend days? Re-coded as dichotomous:  < 4 days a week (1) or ≥ 4 days a week (0a)
Family
 Maternal BMI Parent-reported Calculated from the self-reported body height and weight. BMI computed and re-coded as dichotomous: < 25 kg/m2 (1a) or ≥ 25 kg/m2 (0)
 Maternal education Parent-reported Highest educational level. Re-coded as dichotomous: university and higher education (1) or lower than university education (0a)
 Paternal BMI Parent-reported Calculated from the self-reported body height and weight. BMI computed re-coded as dichotomous:  < 25 kg/m2 (1a) or ≥ 25 kg/m2 (0)
 Paternal education Parent-reported Highest educational level. Re-coded as dichotomous: university and higher education (1) or lower than university education (0a)
 Family income Parent-reported Is the total gross income of your household greater than 48,000 CZK per month (twice the median in Czechia)? Binary variable: yes (1) or no (0a)
  1. Parent proxy report was required for participants aged 12 years and younger
  2. AT Active travel, BMI Body Mass Index, PA Physical activity, SD Standard deviation
  3. aindicates reference category