Tracking of total sedentary time and sedentary patterns in youth: a pooled analysis using the International Children’s Accelerometry Database (ICAD)

Table 2 Tracking of total and prolonged sedentary time and their day-to-day variation

	Total sedentary time	Prolonged sedentary time	Day-to-day variation in total sedentary time	Day-to-day variation in prolonged sedentary time
Total sample^a (n = 5991)	0.48 [0.45; 0.50] p < 0.0001	0.43 [0.41; 0.45] p < 0.0001	0.04 [0.02; 0.07] p < 0.0017	0.07 [0.04; 0.09] p < 0.0001
Moderation by gender^b
Boys (n = 2757)	0.51 [0.47; 0.55] p < 0.0001	0.46 [0.42; 0.49] p < 0.0001
Girls (n = 3234)	0.45 [0.42; 0.48] p < 0.0001	0.42 [0.39; 0.44] p < 0.0001
Moderation by age group^c
During childhood (n = 1919)	0.62 [0.57; 0.67] p < 0.0001			0.02 [−0.03; 0.06] P = 0.21
During transition from childhood to adolescence (n = 4050)	0.44 [0.42; 0.46] p < 0.0001			0.09 [0.06; 0.12] p < 0.0001

Values are standardized regression coefficients with 95% confidence intervals. Tracking was defined as low when the standardized coefficient was < 0.3; moderate 0.3–0.6; and high > 0.6 ‘No evidence of tracking’ was assigned when the association between baseline and follow-up levels had a P ≥ 0.05
^aAnalyses were adjusted for gender, follow-up duration and baseline age. ^b Analyses were adjusted for follow-up duration and baseline age. ^c Analyses were adjusted for gender and follow-up duration. When interaction terms for moderating effects had a p < 0.05, stratified tracking analyses are reported

ISSN: 1479-5868