Table 3.

Linear Regression results of waking monitoring (parent and youth assessed) and bedtime monitoring and dependent sleep variables: parent-reported sleep duration and sleep variability

	Parent-Reported Usual Sleep Duration	Sleep Variability
Covariates	Beta (t)
Gender	.05 (.66) p = .51	−.09 (−.92) p = .36
Age	−.20 (−2.55) p = .01	.23 (2.48) p = .02
Independent Variables
Parental monitoring (parent report)	.04 (.51) p = .61	−.02 (−.23) p = .82
Parental monitoring (youth report)	.08 (1.52) p = .34	−.14 (−1.40) p = .16
Parental knowledge about bedtime	.18 (2.22) p = .03	.09 (.89) p = .38
Parental expectations about bedtime	.12 (1.50) p = .14	.12 (1.19) p =.24
	n = 149	n = 113

Note: N = 149 for linear regression analyses. A total of 16 participants were excluded from parent - reported sleep duration analyses: n = 7 due to missing data or study withdrawal; n = 1 due to reported usual sleep duration (2.5 hours) that was 3 standard deviations below the mean; n = 1 participant due to reported usual sleep duration (16.5 hours) greater than 3 standard deviations above the mean; n = 4 participants due to data points that were multivariate outliers; and n = 3 outliers that influenced the regression coefficient. Sleep variability was calculated from actigraphy, final n includes participants who wore the actigraph 75% of the time.