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Table 2 Participant characteristics by group allocation at baseline. Mean (SD) unless other stated.

From: Effects of a school-based physical activity intervention on academic performance in 14-year old adolescents: a cluster randomized controlled trial – the School in Motion study

 

PAL Intervention

(n = 536–655)

DWBH Intervention

(n = 427–586)

Control

(n = 583–795)

Girls

Boys

Girls

Boys

Girls

Boys

N

328

327

286

300

387

408

Age (year)

13.9 (0.3)

13.9 (0.3)

13.9 (0.3)

14.0 (0.3)

14.0 (0.3)

14.0 (0.3)

Parents education levels

 Low (%)

5.8

7.0

5.2

7.6

2.5

7.1

 Middle (%)

26.5

27.0

30.0

32.3

26.8

29.0

 Middle high (%)

42.4

42.2

43.7

34.7

43.2

39.0

 High (%)

23.8

22.9

20.2

24.3

26.1

23.5

Anthropometry

 Height (cm)

162.9 (6.2)

166.3 (9.4)

164.1 (6.1)

168.6 (8.4)

163.9 (6.5)

167.6 (8.3)

 Weight (kg)

54.3 (9.6)

54.1 (11.8)

55.9 (10.2)

56.5 (11.7)

54.2 (9.3)

54.6 (11.5)

Physical activity levels full day

 Total PA (cpm)

473.2 (157.3)

552.1 (207.0)

512.8 (204.5)

563.7 (204.7)

510.5 (174.7)

590.1 (227.1)

 MVPA (min/day)

64.5 (21.8)

71.6 (25.8)

69.6 (25.0)

73.3 (28.0)

69.7 (25.5)

77.8 (30.3)

 Sedentary (min/day)

560.0 (69.9)

530.3 (86.7)

551.3 (75.4)

521.7 (80.6)

545.9 (72.0)

513.9 (82.9)

Academic performance

 Numeracy (points)

53.5 (9.8)

56.4 (9.8)

54.2 (9.3)

55.3 (9.4)

56.1 (9.9)

55.2 (10.1)

 Reading (points)

56.5 (9.7)

54.2 (9.7)

55.8 (9.6)

53.0 (10.2)

57.5 (9.7)

52.7 (10.3)

  1. PAL = Physical active learning; DWBH = Don’t worry – Be happy”. PA = physical activity; MVPA = moderate-to-vigorous intensity physical activity