Table 2.

Associations (beta (95%CI)) between participant characteristics and rest-activity profiles for weekday and weekend in adolescents in the National Health and Nutrition Examination Survey (2011–2014)

	PCA1		PCA2		PCA3		PCA4
	Weekday	Weekend	Weekday	Weekend	Weekday	Weekend	Weekday	Weekend
Age
12-13.9	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.
14-15.9	-0.32 (-0.51, -0.14)	-0.32 (-0.49, -0.15)	0.02 (-0.17, 0.21)	-0.11 (-0.32, 0.09)	-0.14 (-0.32, 0.04)	0.1 (-0.06, 0.25)	-0.01 (-0.19, 0.17)	0.37 (0.14, 0.60)
16-17.9	-0.56 (-0.74, -0.38)	-0.46 (-0.64, -0.29)	-0.07 (-0.23, 0.09)	-0.07 (-0.29, 0.15)	-0.23 (-0.38, -0.08)	0.55 (0.35, 0.76)	0.19 (0.03, 0.35)	0.16 (-0.08, 0.39)
18-19.9	-0.87 (-1.11, -0.62)	-0.55 (-0.77, -0.32)	-0.48 (-0.65, -0.3)	-0.39 (-0.59, -0.18)	0.17 (0.02, 0.32)	0.55 (0.38, 0.72)	0.07 (-0.07, 0.21)	0.30 (0.10, 0.51)
Sex
Male	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.
Female	-0.00 (-0.12, 0.11)	0.15 (0.01, 0.29)	-0.01 (-0.12, 0.10)	0.05 (-0.11, 0.20)	-0.03 (-0.17, 0.11)	0.19 (0.02, 0.36)	0.27 (0.14, 0.40)	-0.07 (-0.17, 0.03)
Race/ethnicity
NH Black	-0.03 (-0.18, 0.12)	-0.11 (-0.24, 0.02)	0.06 (-0.12, 0.24)	-0.1 (-0.29, 0.09)	-0.04 (-0.22, 0.14)	0.15 (-0.02, 0.32)	0.19 (-0.01, 0.39)	-0.01 (-0.19, 0.18)
Mexican American	0.20 (-0.05, 0.45)	-0.06 (-0.27, 0.15)	0.32 (0.12, 0.51)	0.17 (-0.04, 0.37)	0.04 (-0.19, 0.26)	-0.02 (-0.21, 0.18)	0.12 (-0.11, 0.36)	-0.08 (-0.28, 0.13)
Other Hispanic	0.15 (-0.05, 0.35)	-0.04 (-0.25, 0.17)	0.07 (-0.17, 0.31)	-0.07 (-0.32, 0.17)	0.01 (-0.25, 0.27)	0.04 (-0.14, 0.23)	0.17 (-0.06, 0.40)	-0.10 (-0.30, 0.10)
Asian	-0.27 (-0.45, -0.08)	-0.43 (-0.61, -0.24)	0.21 (-0.02, 0.44)	-0.01 (-0.22, 0.21)	0.10 (-0.12, 0.33)	0.05 (-0.11, 0.20)	0.11 (-0.08, 0.30)	-0.09 (-0.28, 0.11)
Other	-0.16 (-0.48, 0.17)	-0.22 (-0.46, 0.02)	0.33 (0.03, 0.63)	0.08 (-0.17, 0.33)	-0.12 (-0.36, 0.13)	-0.18 (-0.59, 0.23)	0.25 (-0.00, 0.50)	-0.17 (-0.55, 0.21)
NH White	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.
Household income
<$20k	0.03 (-0.23, 0.28)	0.05 (-0.20, 0.29)	-0.32 (-0.49, -0.15)	-0.36 (-0.58, -0.14)	-0.07 (-0.31, 0.18)	0.09 (-0.11, 0.30)	0.07 (-0.11, 0.26)	-0.05 (-0.33, 0.23)
$20k-$44.9k	-0.06 (-0.23, 0.12)	-0.13 (-0.35, 0.08)	-0.13 (-0.35, 0.09)	-0.25 (-0.50, -0.01)	-0.14 (-0.33, 0.06)	0.06 (-0.17, 0.30)	-0.05 (-0.3, 0.19)	-0.07 (-0.34, 0.20)
$45k-$74.9k	-0.00 (-0.22, 0.21)	-0.01 (-0.21, 0.19)	-0.16 (-0.38, 0.07)	-0.13 (-0.37, 0.11)	-0.24 (-0.48, 0.00)	0.17 (-0.09, 0.42)	-0.10 (-0.34, 0.14)	0.03 (-0.20, 0.26)
≥$75k	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.
HH ref person’s education level
Less Than 9th Grade	-0.08 (-0.34, 0.18)	0.02 (-0.22, 0.27)	0.19 (-0.11, 0.48)	0.08 (-0.27, 0.43)	-0.00 (-0.39, 0.38)	-0.12 (-0.34, 0.10)	-0.13 (-0.52, 0.26)	-0.07 (-0.43, 0.29)
9-11th Grade	0.15 (-0.07, 0.38)	0.15 (-0.10, 0.40)	0.07 (-0.14, 0.28)	-0.20 (-0.49, 0.08)	-0.12 (-0.39, 0.15)	-0.14 (-0.35, 0.07)	0.05 (-0.20, 0.30)	-0.01 (-0.28, 0.26)
High School Grad	-0.02 (-0.24, 0.20)	0.00 (-0.25, 0.25)	0.14 (-0.09, 0.37)	-0.11 (-0.37, 0.14)	-0.06 (-0.32, 0.21)	-0.23 (-0.45, -0.01)	0.06 (-0.19, 0.31)	-0.07 (-0.29, 0.16)
Some College	0.01 (-0.19, 0.21)	-0.00 (-0.22, 0.22)	0.24 (0.04, 0.45)	0.01 (-0.23, 0.24)	0.02 (-0.21, 0.24)	-0.04 (-0.23, 0.16)	0.00 (-0.23, 0.23)	-0.04 (-0.24, 0.16)
College Graduate or higher	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.

Abbreviations: CI confidence interval, HH Household, NH non-Hispanic, PCA1-4 principal component analysis component 1-4

Beta (95% CI) derived from multiple linear regression models included all study characteristics and their categories simultaneously