SLEEP 2011 Abstract Supplement

B. Clinical Sleep Science XI. Pediatrics
T2 using a sleep diary. The mean night-time sleep duration was derived
separately at T1 and at T2 (r = .50). At T3, mothers completed the Child
Behavior Checklist to assess children’s internalizing and externalizing
behavior problems.
Results: Results indicated that parenting quality interacted with infant
sleep, at both 12 and 18 months, to predict toddlers’ externalizing problems
(β = - 0.32, p < .05; β = - 0.57, p < .05). These results were not
found in regards to internalizing problems. The significant interactions
were broken down, revealing in both cases that higher maternal sensitivity
was related to lower levels of externalizing problems, however only
for children who slept more at night.
Conclusion: The results of this study suggest that maternal sensitivity
protects against externalizing problems when children get more nighttime
sleep, and therefore perhaps that children who sleep less benefit to
a lesser extent from quality parenting because they are more fatigued or
irritable, and hence less receptive to external influences.
0837
ASSOCIATIONS BETWEEN NAP DURATION AND
OBSERVED CHILDCARE QUALITY USING DATA FROM
THE EARLY CHILDHOOD LONGITUDINAL STUDY-BIRTH
COHORT
Burnham MM 1 , Gaylor E 2 , Wei X 2
1
Educational Psychology, Counseling, & Human Development,
University of Nevada, Reno, Reno, NV, USA, 2 Center for Education
and Human Services, Policy Division, SRI International, Menlo Park,
CA, USA
Introduction: Most young children spend time being cared for in childcare
programs, and most two-year-olds are still napping daily. Very little
is known about napping and its potential relationship with characteristics
of childcare programs. Previous exploratory research found that
children in high quality child care slept less during the day compared
to peers in low quality settings. This study examines whether the observed
quality of childcare settings is associated with two-year-olds’ nap
duration in a national dataset: the Early Childhood Longitudinal Study
- Birth Cohort (ECLS-B).
Methods: ECLS-B is a longitudinal, nationally representative study of
children in the U.S. The analyses reported here use data from the twoyear
wave of data collection (approximately 1,000 two-year-olds). All
analyses used SAS PROC SURVEY Taylor Series Linearization, which
takes into account the complex sampling design. Childcare quality was
measured by the Infant/Toddler Environmental Rating Scale (ITERS),
an assessment of the quality of center-based childcare classrooms. Our
analysis used both subscale scores and the global quality rating (ranging
from 1 to 7; 7 = highest quality). Childcare providers reported on
children’s nap duration.
Results: Average nap duration for children in center-based care was
1.83 hours per day. After controlling for gender, ethnicity, hours in care,
socioeconomic status, and bedtime characteristics, we found that the
global ITERS rating is negatively related to nap duration (β = -0.03, p <
.0001). All ITERS subscales also were significantly associated with nap
duration (p value ranges from