Table 4.

Within‐child correlations between sleep measures

		Accelerometer‐measured sleep duration		Accelerometer‐measured sleep timing				Parent‐reported sleep timing
		Weekday	Weekend	Weekday bedtime	Weekday wake time	Weekend bedtime	Weekend wake time	Weekday bedtime	Weekday wake time	Weekend bedtime	Weekend wake time
Accelerometer‐measured sleep duration	Weekday		0.27***	−0.54***	0.35***	−0.22**	−0.01	−0.31***	0.13	−0.27***	−0.07
	Weekend			−0.08	0.21**	−0.30***	0.48***	0.06	0.14	−0.04	0.14
Accelerometer‐measured sleep timing	Weekday bedtime				0.52***	0.62***	0.49***	0.56***	0.25***	0.63***	0.45***
	Weekday wake time					0.44***	0.55***	0.32***	0.47***	0.41***	0.43***
	Weekend bedtime						0.64***	0.37***	0.25***	0.59***	0.48***
	Weekend wake time							0.38***	0.34***	0.48***	0.54***
Parent‐reported sleep timing	Weekday bedtime								0.26***	0.67***	0.33***
	Weekday wake time									0.26***	0.37***
	Weekend bedtime										0.51***
	Weekend wake time

Two individuals do not have accelerometer‐measured weekend sleep values. Statistically significant relationships are shaded for ease in viewing. Correlation coefficients (r‐values) are shown.

^* P < 0.05.

^** P < 0.01.

^*** P < 0.001.