Table 3.

Association for sedentary time, MVPA, breaks in sedentary time, non-prolonged and prolonged sedentary bouts with standardized fitness composite score (z-score), by sex

	Fitness composite score
	All		Boys		Girls
	β (95% CI)a	β (95% CI)b	β (95% CI)a	β (95% CI)c	β (95% CI)a	β (95% CI)c
Sedentary time (min/day)	0.000 (−0.001; 0.002)	0.001 (−0.001; 0.002)	0.00 (0.000; 0.004)	0.001 (−0.002; 0.003)	−0.001 (−0.003; 0.000)	0.000 (−0.001; 0.002)
Prolonged SB (bouts/day)	0.080 (−0.064; 0.223)	0.080 (−0.063; 0.223)	0.167 (−0.065; 0.398)	0.132 (−0.096; 0.360)	0.001 (−0.177; 0.178)	0.081 (−0.094; 0.256)
Non-prolonged SB (bouts/day)	0.010 (0.004; 0.017)	0.011 (0.002; 0.020) d	0.011 (0.000; 0.022)	0.003 (−0.013; 0.018)	0.010 (0.002; 0.018)	0.014 (0.003; 0.024) d
Breaks in SB (breaks/day)	0.009 (0.001; 0.017)	0.024 (0.013; 0.034) d	0.008 (−0.005; 0.021)	0.026 (0.009; 0.042) d	0.010 (0.001; 0.020)	0.001 (−0.017; 0.019)
MVPA (min/day)	0.008 (0.003; 0.013)	0.010 (0.005; 0.016) d	0.008 (0.001; 0.015)	0.013 (0.005; 0.021) d	0.011 (0.003; 0.019)	0.014 (0.006; 0.022) d

Data are unstandardized β coefficient and 95% confidence interval (CI)

SB sedentary behavior, MVPA moderate-to-vigorous physical activity

^aUnadjusted model

^bThe models were adjusted for total sedentary time, sex, age, and season of data collection

^cThe models were adjusted for total sedentary time, age, and season of data collection

^dVariables that remained in the model

β coefficients in bold mean significant associations (p ≤ 0.05)