Table 2.

Correlations between Study Variables

Variable	M (SD)	2	3	4	5	6	7	8	9	10	11	12	13
1. Nightly Sleep – 30	586.01(38.87)	30*	.22	.33**	.15	.08	.05	.16	−.05	.02	−.02	.22	−.18
2. Nightly Sleep – 36	579.74 (50.22)	--	.46***	−.02	.47***	−.03	.12	.26*	.13	.12	.30*	.31*	−.32**
3. Nightly Sleep – 42	587.54 (45.63)		--	.00	−.09	.22	−.07	.03	−.10	−.05	.13	.29*	.00
4. 24hr Sleep – 30	704.32 (47.51)			--	.34*	.35**	−.13	−.12	−.05	−.03	.24	. 21	−.18
5. 24hr Sleep – 36	685.33 (55.38)				--	.19	−.10	.04	.05	.16	.22	.16	−.23
6. 24hr Sleep – 42	669.33 (37.36)					--	−.34**	−.24	−.06	.16	.16	.16	−.11
7. Awakenings - 30	3.27 (3.65)						--	.58***	.57***	.01	.07	.02	−.01
8. Awakenings - 36	3.53 (3.59)							--	.46***	.06	.10	.03	−.03
9. Awakenings - 42	2.78 (2.57)								--	.14	.21	.13	−.01
10. Adherence – 30	0.76 (0.16)									--	.34*	.28*	−.32**
11. Adherence – 36	0.76 (0.19)										--	.55***	−.26*
12. Adherence – 42	0.75 (0.20)											--	−.19
13. Parenting	2.34 (0.71)												--

Note. Nightly Sleep = average nighttime sleep minutes (actigraphy); 24hr Sleep = average sleep minutes per 24 hour period (actigraphy); Awakenings = average frequency of parent reported nighttime awakenings. Samples sizes range from 57 to 81.

^*p < .05.

^**p < .01.

^***p < .001 (two-tail).