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Table 1 Characteristics of participants by school stages

From: Objectively measured sedentary behaviour and moderate and vigorous physical activity in different school subjects: a cross-sectional study

 

Grades 1–3 N = 305

Grades 4–6 N = 258

Grades 7–9 N = 83

Gender (%)

 Male

50.8

53.1

60.2

 Female

49.2

46.9

39.8

Age (y)

7.9 ± 0.7

11.0 ± 0.8*

14.6 ± 1.1*,#

Height (m)

1.34 ± 0.07

1.51 ± 0.09*

1.69 ± 0.08*,#

Weight (kg)

32.0 ± 7.8

45.1 ± 12.5*

62.4 ± 13.1 *,#

BMI (kg/m2)

17.6 ± 2.9

19.6 ± 4.0*

21.7 ± 3.4*,#

BMI z-score

−0.36 ± 0.78

0.17 ± 1.08*

0.74 ± 0.91*,#

Weight status (%)

 Under weight or normal

69.0

72.1

70.7

 Overweight or obese

31.0

27.9

29.3

  1. Data presented as mean ± standard deviation or %. BMI – body mass index. Overweight or obese – age-specific BMI corresponding to BMI ≥ 25.0 at age 18
  2. *different from grades 1–3, p < 0.05
  3. #different from grades 4–6, p < 0.05
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BMC Public Health

ISSN: 1471-2458

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