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Table 3 Cross-sectional relationships between sleep and activity components and BMI z-score at each agea

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

Age (years)

Mean (SD) BMI z-score

Component

Regression coefficientb (SE)

p-value

10% relative difference in minutes

Estimated difference (95% CI) in BMI z-score with a 10% increase in component

Estimated difference (95% CI) in BMI z-score with a 10% decrease in component

1 (n = 346)

0.39 (0.83)

Sleepc

0.00 (0.30)

0.989

71

−0.001 (− 0.099, 0.097)

0.001 (− 0.098, 0.099)

  

Sedentaryd

0.02 (0.30)

0.934

56

−0.008 (− 0.087, 0.072)

0.008 (− 0.074, 0.090)

  

LPA

0.03 (0.14)

0.816

18

0.010 (−0.013, 0.033)

−0.011 (− 0.036, 0.014)

  

MVPA

−0.06 (0.04)

0.130

0.1

−0.004 (− 0.010, 0.002)

0.004 (− 0.003, 0.012)

2 (n = 213)

0.70 (0.89)

Sleep

0.45 (0.40)

0.265

69

0.074 (−0.056, 0.204)

−0.075 (− 0.205, 0.056)

  

Sedentary

−0.28 (0.37)

0.448

46

−0.035 (− 0.124, 0.055)

0.037 (− 0.058, 0.131)

  

LPA

−0.08 (0.33)

0.804

28

−0.009 (− 0.076, 0.059)

0.009 (− 0.064, 0.082)

  

MVPA

−0.09 (0.08)

0.285

0.6

−0.007 (− 0.020, 0.006)

0.008 (− 0.006, 0.022)

3.5 (n = 231)

0.61 (0.83)

Sleep

−1.57 (0.55)

0.005

65

−0.248 (− 0.418, − 0.080)

0.252 (0.079, 0.425)

  

Sedentary

0.97 (0.45)

0.034

47

0.122 (0.010, 0.235)

−0.129 (− 0.247, − 0.011)

  

LPA

0.77 (0.32)

0.017

29

0.081 (0.015, 0.147)

−0.087 (− 0.158, − 0.016)

  

MVPA

− 0.17 (0.13)

0.182

2

−0.014 (− 0.036, 0.007)

0.016 (− 0.007, 0.039)

5 (n = 248)

0.44 (0.84)

Sleep

−0.89 (0.54)

0.100

64

−0.137 (− 0.300, 0.026)

0.140 (− 0.026, 0.306)

  

Sedentary

0.25 (0.41)

0.534

49

0.032 (− 0.070, 0.135)

−0.034 (− 0.141, 0.073)

  

LPA

0.55 (0.30)

0.072

28

0.057 (− 0.005, 0.118)

−0.061 (− 0.128, 0.005)

  

MVPA

0.09 (0.13)

0.481

3

0.008 (−0.014, 0.029)

−0.008 (− 0.032, 0.015)

  1. LPA is light physical activity, MVPA is moderate-to-vigorous physical activity
  2. aAdjusted for randomised group, sex, primiparous, maternal education, household deprivation, ethnicity and maternal BMI. Analyses at 1 year of age further adjusted for whether the child was walking unaided or not walking
  3. bCoefficient for the first isometric log ratio (ilr) co-ordinate, which is proportional to the log ratio of the behavior and the geometric mean of the remaining behaviors; adjusted for remaining ilr co-ordinates
  4. cAll sleep estimates include naps where relevant
  5. dAll sedentary estimates include wake after sleep onset
  6. Bolded values indicate P < 0.05