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Table 1 Descriptive characteristics for the participants in this study (n = 389)

From: Associations between the duration of active commuting to school and academic achievement in rural Chilean adolescents

Girls, n (%) 193 (49.6)
 Age, years 12.0 ± 0.6
Weight status a
 Underweight, n (%) 4 (1.0)
 Normal, n (%) 172 (44.2)
 Overweight, n (%) 115 (29.6)
 Obesity, n (%) 98 (25.2)
Birth weight
 Low birth weight (≤2500 g), n (%) 20 (5.1)
Self-reported physical activity
 High b 72 (18.5)
Sedentary behaviour
 Exceeding recommended limits c, n (%) 266 (68.4)
Mother’s education
 Level university, n (%) 57 (14.7)
SES
 Low, n (%) 52 (13.4)
 Medium, n (%) 267 (68.6)
 High, n (%) 70 (18.0)
Academic achievement
 Language (1–7) 5.0 ± 0.9
 High academic achievement, n (%) 217 (57.7)
 Mathematics (1–7) 5.3 ± 0.6
 High academic achievement, n (%) 238 (61.3)
Means of transport
 Public transport, n (%) 148 (38.0)
 Car/Motorbike, n (%) 152 (39.1)
Frequency
 Active transport to school, n (%) 89 (22.9)
 Active transport from school, n (%) 111 (28.5)
Duration of ACS d
 Non-ACS, n (%) 273 (70.2)
 ACS ≤30 min, n (%) 55 (14.1)
 ACS 30–60 min, n (%) 40 (10.3)
 ACS ≥60 min, n (%) 21 (5.4)
  1. Values are means (standard deviations ± SD) and number and proportions (%) for categorical data. ACS, active commuting to school; BMI, body mass index; SES, socio economic status. a, Weight status defined as follows: Underweight (z-score < −1 s), Normal weight (z-score from −1 s to 1 s), Obesity risk (z-score from 1 s to 2 s) and Obesity (z-score >2 s); b, Physical activity ≥2.09; c, ≥2 h/day of screen time; d, duration of walking active commuting to school and/or from school