Changes in sedentary behavior patterns during the transition from childhood to adolescence and their association with adiposity: a prospective study based on compositional data analysis

Table 2 Compositional robust regression model estimates for the adiposity markers of 5-year changes

	Fat mass (%)			Fat mass index (kg/m²)			Visceral adipose tissue (cm²)
	β_ilr1	95% CI	p-value	β_ilr1	95% CI	p-value	β_ilr1	95% CI	p-value
Model based on the 4-part composition
SB (h/week)	0.06	(−0.30, 0.41)	0.757	0.03	(−0.39, 0.45)	0.888	0.48	(−0.27, 1.23)	0.209
LPA (h/week)	0.00	(−0.41, 0.41)	0.990	0.03	(−0.46, 0.52)	0.890	−0.25	(−1.09, 0.59)	0.561
MPA (h/week)	0.00	(−0.18, 0.19)	0.977	0.01	(−0.22, 0.25)	0.910	0.07	(−0.34, 0.48)	0.735
VPA (h/week)	−0.06	(−0.13, 0.02)	0.157	−0.07	(−0.17, 0.02)	0.141	−0.30	(−0.52, −0.08)	0.010
Model based on the 6-part composition
SB short bouts (h/week)	−0.38	(−0.87, 0.12)	0.132	−0.25	(−0.82, 0.33)	0.400	0.25	(−1.01, 1.51)	0.693
SB middle bouts (h/week)	0.27	(0.02, 0.53)	0.034	0.24	(−0.09, 0.58)	0.152	0.22	(−0.39, 0.82)	0.482
SB long bouts (h/week)	−0.04	(−0.14, 0.07)	0.496	−0.05	(−0.17, 0.06)	0.357	0.06	(−0.12, 0.24)	0.499
LPA (h/week)	0.19	(−0.28, 0.66)	0.422	0.10	(−0.54, 0.73)	0.766	−0.32	(−1.61, 0.97)	0.620
MPA (h/week)	−0.01	(−0.18, 0.16)	0.879	0.03	(−0.20, 0.26)	0.824	0.09	(−0.35, 0.53)	0.684
VPA (h/week)	−0.04	(−0.11, 0.03)	0.278	−0.07	(−0.17, 0.03)	0.187	−0.30	(−0.54, −0.05)	0.019

Independent variables are expressed as the first pivot coordinate which represents the relative contribution of one behavior relative to remaining behaviors
All regression models were adjusted for age, sex, and fat mass percentage at baseline
Bold values denote significant results
CI confidence interval, ilr1 isometric log-ratio (the first pivot coordinate), LPA light physical activity, MPA moderate physical activity, SB sedentary behavior, VPA vigorous physical activity

ISSN: 2049-3258