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Table 4 Predictive relationships between sleep and activity components at 1, 2 and 3.5 years of age, and BMI z-score at 5 yearsa

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

Age (years) Mean BMI z-score (SD) at 5 years of age 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 = 292) 0.43 (0.83) Sleepc − 0.24 (0.24) 0.336 71 −0.038 (− 0.119, 0.043) 0.038 (− 0.043, 0.119)
   Sedentaryd 0.28 (0.25) 0.266 56 0.024 (−0.042, 0.089) −0.024 (− 0.092, 0.043)
   LPA −0.08 (0.12) 0.510 18 0.002 (−0.017, 0.021) −0.002 (− 0.023, 0.019)
   MVPA 0.03 (0.03) 0.312 0.1 0.003 (−0.003, 0.008) −0.003 (− 0.009, 0.003)
2 (n = 190) 0.43 (0.89) Sleep − 0.43 (0.28) 0.126 69 −0.071 (− 0.162, 0.020) 0.072 (− 0.020, 0.164)
   Sedentary 0.45 (0.26) 0.082 46 0.056 (−0.007, 0.120) −0.059 (− 0.126, 0.007)
   LPA −0.05 (0.24) 0.817 28 −0.006 (− 0.054, 0.042) 0.006 (− 0.046, 0.058)
   MVPA 0.03 (0.06) 0.559 0.6 0.003 (−0.007, 0.012) − 0.003 (− 0.013, 0.007)
3.5 (n = 212) 0.44 (0.84) Sleep −0.08 (0.30) 0.784 65 −0.013 (− 0.107, 0.081) 0.013 (− 0.082, 0.108)
   Sedentary −0.24 (0.25) 0.326 47 −0.031 (− 0.091, 0.030) 0.032 (− 0.032, 0.096)
   LPA 0.23 (0.17) 0.183 29 0.024 (−0.011, 0.060) −0.026 (− 0.065, 0.012)
   MVPA 0.09 (0.07) 0.182 2 0.008 (− 0.004, 0.019) −0.009 (− 0.021, 0.004)
  1. LPA is light physical activity, MVPA is moderate-to-vigorous physical activity
  2. aAdjusted for concurrent BMI z-score, 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