TABLE 2

Regression Coefficients (95% CI) for Behavioral Difficulties Scores by Bedtimes at Age 7, Cross-Sectional Analysis

Mother ReportTeacher Report
nModel AModel BnModel AModel B
Before 7:308960.42 (−0.03 to 0.87)−0.22 (−0.60 to 0.16)5870.52 (−0.02 to 1.05)0.07 (−0.45 to 0.58)
7:30–7:592158−0.07 (−0.37 to 0.24)−0.10 (−0.33 to 0.13)1470−0.06 (−0.51 to 0.38)−0.03 (−0.47 to 0.40)
8:00–8:29 (ref)35062373
8:30–8:591653−0.29 (−0.63 to 0.05)−0.28 (−0.58 to 0.03)1073−0.45 (−0.84 to −0.05)*−0.50 (−0.88 to −0.12)*
9:00 or later11430.85 (0.37 to 1.34)***0.25 (−0.15 to 0.66)6940.15 (−0.41 to 0.70)−0.19 (−0.75 to 0.37)
Not regular8741.99 (1.50 to 2.47)***0.72 (0.34 to 1.10)***5601.39 (0.70 to 2.06)***0.75 (0.15 to 1.35)*
  • Model A adjusts for child’s age and gender. Model B additionally adjusts for mother’s age in years, birth order, family income, highest parental qualification, mother’s psychological distress, discipline strategies, mother often irritated with child, mother’s parenting competence, breastfed, skips breakfast, helped with reading, helped with math, helped with writing, TV hours per weekday, computer hours per weekday, parental employment, mother’s view of amount of time with child, father’s view of amount of time with child, child attends breakfast club, any other child care, child read to, TV time rules, overcrowding, child wets bed, child’s sleep disturbed by wheezing, TV in bedroom.

  • * P < .05.

  • *** P < .001.