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

Taylor, Rachael W.; Haszard, Jillian J.; Meredith-Jones, Kim A.; Galland, Barbara C.; Heath, Anne-Louise M.; Lawrence, Julie; Gray, Andrew R.; Sayers, Rachel; Hanna, Maha; Taylor, Barry J.

doi:10.1186/s12966-018-0753-6

International Journal of Behavioral Nutrition and Physical Activity

Table 7 Predictive and concurrent relationships between sleep and activity components at 1, 2, 3.5 and 5 years of age and total body minus head BMD (g/cm²) at 5 years^a

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

Age (years)	Mean BMD (SD) at 5 years of age (g/cm²)	Component	Regression coefficient^b (SE)	p-value	10% relative difference in minutes	Estimated difference (95% CI) in BMD with a 10% increase in component	Estimated difference (95% CI) in BMD with a 10% decrease in component
1 (n = 229)	0.608 (0.037)	Sleep^c	0.010 (0.015)	0.516	71	0.002 (−0.003, 0.007)	−0.002 (− 0.007, 0.003)
		Sedentary^d	− 0.032 (0.015)	0.029	56	−0.004 (− 0.008, − 0.0005)	0.005 (0.0005, 0.009)
		LPA	0.024 (0.007)	0.001	18	0.002 (0.001, 0.004)	−0.002 (− 0.004, − 0.001)
		MVPA	−0.001 (0.002)	0.632	0.1	0.000 (−0.0004, 0.0002)	0.000 (−0.0003, 0.0005)
2 (n = 158)	0.609 (0.036)	Sleep	−0.003 (0.015)	0.839	69	−0.001 (− 0.005, 0.004)	0.001 (− 0.004, 0.005)
		Sedentary	−0.010 (0.014)	0.465	46	−0.001 (− 0.005, 0.002)	0.001 (− 0.002, 0.005)
		LPA	0.002 (0.014)	0.904	28	0.000 (−0.003, 0.003)	0.000 (−0.003, 0.003)
		MVPA	0.012 (0.003)	0.001	0.6	0.001 (0.0004, 0.0015)	−0.001 (− 0.0017, − 0.0005)
3.5 (n = 178)	0.607 (0.037)	Sleep	−0.021 (0.027)	0.426	65	−0.003 (− 0.012, 0.005)	0.003 (− 0.005, 0.012)
		Sedentary	−0.007 (0.021)	0.751	47	−0.001 (− 0.006, 0.004)	0.001 (− 0.005, 0.006)
		LPA	0.015 (0.016)	0.351	29	0.002 (−0.002, 0.005)	−0.002 (− 0.005, 0.002)
		MVPA	0.014 (0.006)	0.023	2	0.001 (0.0002, 0.0021)	−0.001 (− 0.0023, − 0.0002)
5 (n = 213)	0.609 (0.037)	Sleep	−0.054 (0.025)	0.031	64	−0.008 (− 0.0008, − 0.0159)	0.009 (0.0008, 0.0162)
		Sedentary	0.036 (0.019)	0.055	49	0.005 (−0.0001, 0.0092)	−0.005 (− 0.0097, 0.0001)
		LPA	−0.001 (0.014)	0.953	28	0.000 (−0.003, 0.003)	0.000 (−0.003, 0.003)
		MVPA	0.019 (0.006)	0.001	3	0.002 (0.0007, 0.0026)	−0.002 (− 0.0028, − 0.0007)

LPA is light physical activity, MVPA is moderate-to-vigorous physical activity
^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
^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
^cAll sleep estimates include naps where relevant
^dAll sedentary estimates include wake after sleep onset
Bolded values indicate P < 0.05

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ISSN: 1479-5868

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