Table 1. Description of variables used in the analysis.
| Variable | Response category | Mean (SD) | Proportion (%) |
|---|---|---|---|
| Demographical and biological | |||
| Gender | Boy | N/A | 48 |
| Girl | N/A | 52 | |
| Grade | 5th (age 11) | N/A | 36 |
| 7th (age 13) | N/A | 35 | |
| 9th (age 15) | N/A | 29 | |
| Body mass index (BMI) | Thin/normal | 18.8 (2.3) | 86 |
| Overweight | 24.6 (1.7) | 11 | |
| Obese | 30.7 (3.2) | 3 | |
| Family Affluence Scale (FAS) III | High | 10.7 (0.9) | 32 |
| Moderate | 8.5 (0.5) | 42 | |
| Low | 6.2 (1.1) | 26 | |
| Psychological, cognitive, and emotional | |||
| Perceived academic achievement | Good/very good | 9.4 (0.5) | 21 |
| Moderate/good | 7.7 (0.5) | 50 | |
| Poor/moderate | 5.4 (1.1) | 29 | |
| Perceived physical competence | High | 23.0 (1.4) | 36 |
| Moderate | 18.5 (1.1) | 31 | |
| Low | 13.1 (2.8) | 33 | |
| Perceived physical capacity | High | 44.6 (2.7) | 35 |
| Moderate | 37.2 (2.0) | 35 | |
| Low | 28.8 (4.2) | 30 | |
| Perceived barriers | High | 44.2 (10.) | 33 |
| Moderate | 58.3 (1.9) | 34 | |
| Low | 63.8 | 33 | |
| Behavioral attributes and skills | |||
| PA events (≤ 1 day/week)a | |||
| School clubs | At least 2 days/ week | N/A | 20 |
| Other clubs (not sports clubs) | At least 2 days/ week | N/A | 23 |
| Private sports clubs | At least 2 days/ week | N/A | 39 |
| Sports clubs (non-profit) | At least 2 days/ week | N/A | 39 |
| Self-directed | At least 2 days/ week | N/A | 75 |
| Screen time (TV, PC, tablet, mobile, console games), ≤2h/day | 0–2 days/week | N/A | 30 |
| 3–4 days/week | N/A | 41 | |
| 5–7 days/week | N/A | 29 | |
| Social and cultural | |||
| Peer support for PA | High | 16.2 (1.9) | 30 |
| Moderate | 11.6 (1.0) | 35 | |
| Low | 6.5 (2.1) | 35 | |
| Parental support for PA | Highb | paternal: 30.6 (2.8) maternal: 30.1 (2.5) | 38 |
| Moderatec | paternal: 23.0 (2.0) maternal: 23.5 (1.7) | 23 | |
| Lowd | paternal: 14.0 (3.9) maternal: 15.4 (3.8) | 39 | |
| Physical environment | |||
| Recess | Outdoors | N/A | 59 |
| Indoors | N/A | 41 | |
| Residence | Urban | N/A | 65 |
| Rural | N/A | 35 | |
| School transportation, winter/spring and autumn | Active (walking, cycling) | N/A | 52e/67f |
| Non-active (motorized) | N/A | 48e/33f | |
| School policies and practices | High (10–15) | 11.5 (1.5) | 33 |
| Moderate (7–9) | 7.9 (0.8) | 40 | |
| Low (1–6) | 4.9 (1.2) | 27 |
SD, standard deviation; N/A, Not applicable.
arow percentage of proportion that met the response category criteria
bparental support was categorized as high if both paternal and maternal support were high or one high and the other moderate
cparental support was categorized as moderate if both paternal and maternal support were moderate or one high and the other low
dparental support was categorized as low if both paternal and maternal support were low or one moderate and the other low
eschool transportation in winter
fschool transportation combined in spring and autumn