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Table 8 Predictive relationships between sleep and activity components at 1, 2 and 3.5 years of age and total body minus head BMC (g) 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 BMC (SD) at 5 years of age (g) Component Regression coefficientb (SE) p-value 10% relative difference in minutes Estimated difference (95% CI) in BMC with a 10% increase in component Estimated difference (95% CI) in BMC with a 10% decrease in component
1 (n = 229) 380 (74) Sleepc 49.3 (27.5) 0.075 71 8.4 (−0.8, 17.6) − 8.4 (− 17.7, 0.8)
   Sedentaryd − 88.7 (27.7) 0.002 56 − 12.3 (− 19.8, − 4.8) 12.8 (5.0, 20.6)
   LPA 42.6 (12.8) 0.001 18 4.0 (1.7, 6.4) −4.4 (− 7.0, − 1.8)
   MVPA −3.2 (3.8) 0.400 0.1 −0.3 (− 0.9, 0.4) 0.3 (− 0.4, 1.0)
2 (n = 158) 383 (73) Sleep 19.6 (28.2) 0.488 69 3.2 (−5.9, 12.4) −3.3 (−12.5, 6.0)
   Sedentary −46.6 (26.2) 0.077 46 −5.8 (−12.2, 0.6) 6.1 (−0.6, 12.9)
   LPA 3.1 (25.7) 0.904 28 0.3 (−4.9, 5.6) −0.4 (−6.0, 5.3)
   MVPA 23.9 (6.1) < 0.001 0.6 2.0 (1.0, 3.0) −2.2 (−3.3, −1.1)
3.5 (n = 178) 379 (74) Sleep −16.9 (50.4) 0.738 65 −2.7 (−18.3, 12.9) 2.7 (−13.2, 18.6)
   Sedentary −26.0 (40.5) 0.522 47 −3.3 (−13.3, 6.7) 3.5 (−7.1, 14.0)
   LPA 16.9 (29.4) 0.565 29 1.8 (−4.3, 7.8) −1.9 (−8.4, 4.6)
   MVPA 26.0 (11.1) 0.021 2 2.2 (0.3, 4.0) −2.4 (−4.4, −0.4)
5 (n = 213) 383 (73) Sleep −93.5 (47.7) 0.051 64 −14.4 (−28.8, 0.005) 14.7 (−0.006, 29.4)
   Sedentary 75.1 (35.4) 0.035 49 9.6 (0.7, 18.5) −10.1 (−19.5, −0.8)
   LPA −19.6 (26.4) 0.458 28 −2.0 (−7.4, 3.3) 2.2 (−3.6, 8.0)
   MVPA 38.0 (10.9) 0.001 3 3.2 (1.4, 5.0) −3.5 (−5.5, −1.6)
  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