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Table 2 Characteristics of the group at each time point including allocation of time use

From: 24-h movement behaviors from infancy to preschool: cross-sectional and longitudinal relationships with body composition and bone health

Variable

Category

Age (years)

1

2

3.5

5

n

 

355

213

231

248

Female n (%)

 

172 (48.5)

93 (43.7)

107 (46.3)

122 (49.2)

Age (months)

 

12.2 (0.3)

24.1 (0.2)

41.9 (0.5)

59.7 (0.4)

Height (cm)

 

75.6 (2.8)

86.2 (3.1)

99.1 (3.8)

109.9 (4.4)

Weight (kg)

 

9.8 (1.1)

12.5 (1.4)

16.0 (1.8)

19.4 (2.4)

BMI (kg/m2)

 

17.2 (1.3)

16.8 (1.3)

16.3 (1.2)

16.0 (1.2)

BMI z-score

 

0.39 (0.83)

0.70 (0.89)

0.61 (0.83)

0.47 (0.81)

Weight statusa n (%)

Normal weight

281 (79.2)

140 (65.7)

158 (68.4)

190 (76.6)

Overweight

52 (14.7)

43 (20.2)

45 (19.5)

40 (16.1)

Obese

22 (6.2)

30 (14.1)

28 (12.1)

18 (7.3)

Sleep componentsb

Night-time sleep

578 (55)

594 (60)

626 (44)

632 (39)

(minutes)

Wake after sleep onset

29 (27)

20 (22)

15 (16)

12 (14)

Day time naps

121 (43)

89 (42)

23 (26)

-c

Activity componentsb

Sedentary

524 (58)

443 (61)

462 (54)

476 (58)

(minutes)

LPA

184 (64)

284 (56)

292 (54)

287 (54)

MVPA

4 (6)

10 (8)

22 (14)

33 (17)

  1. Data presented as mean (SD) except for weight status which is n (%) and only includes those with valid accelerometry data
  2. LPA is light physical activity, MVPA is moderate-to-vigorous physical activity
  3. aNormal weight defined as BMI < 85th, overweight as a BMI z-score ≥ 85th but <95th percentile, and obesity as BMI ≥ 95th percentile according to the WHO growth standards [25]
  4. bData presented as arithmetic mean (SD) which is the average number of minutes spent in each category after individualised normalisation to 24 h
  5. cCould not be calculated as no children napped at this age
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International Journal of Behavioral Nutrition and Physical Activity

ISSN: 1479-5868

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