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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