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Logo of bmcpsycBioMed Centralsearchsubmit a manuscriptregisterthis articleBMC Psychiatry
 
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Published online 2012 November 28. doi: 10.1186/1471-244X-12-212

Table 3

Results of regression analyses studying main effects and interaction effects of circadian and behavioral factors on the children’s sleep habits questionnaire controlling for age and pubertal development

MeasureCSHQ bedtime resistance
CSHQ sleep onset delay
PSG sleep onset delay
BSE BβBSE BβBSE Bβ
Control (Model 1)
 
 
 
 
 
 
 
 
 
 Age
−0.36
0.24
−0.18
0.05
0.07
0.10
0.49
1.97
0.03
 PDS score
0.24
0.16
0.18
0.02
0.04
0.05
0.51
1.25
0.06
 Total R2 (adjusted)
0.03
 
 
−0.01
 
 
−0.03
 
 
Main effects (Model 2)
 
 
 
 
 
 
 
 
 
 Age
−0.18
0.24
−0.09
0.03
0.06
0.05
−0.91
1.88
−0.06
 PDS score
0.18
0.16
0.13
−0.01
0.04
−0.03
0.30
1.14
0.03
 Group (ADHD & Control)
−0.18
0.70
−0.03
0.01
0.18
0.01
4.23
5.14
0.11
 MES for Children (Total)
−0.08
0.33
−0.03
−0.37**
0.08
−0.49
−8.16**
2.42
−0.43
 CBCL: Externalizing (T score)
0.90*
0.34
0.35
0.03
0.09
0.04
−4.10
2.55
−0.22
 Total R2 (adjusted)
0.10*
 
 
0.20**
 
 
0.16*
 
 
Interaction (Model 3)
 
 
 
 
 
 
 
 
 
 Age
−0.12
0.24
−0.06
0.04
0.06
0.08
−0.93
1.93
−0.07
 PDS score
0.16
0.16
0.12
−0.01
0.04
−0.02
0.70
1.21
0.08
 Group (ADHD &Control)
−0.02
0.73
−0.00
0.09
0.19
0.06
5.46
5.42
0.15
 MES for Children (Total Score)
−0.57
0.45
−0.21
−0.42**
0.12
−0.56
−5.80
3.33
−0.31
 CBCL: Externalizing (T score)
1.03*
0.42
0.40
0.11
0.11
0.16
−2.62
2.90
−0.14
 MES Total x Group
1.03
0.64
0.26
0.13
0.17
0.12
−4.63
5.11
−0.16
 CBCL Externalizing x Group
−0.40
0.68
−0.10
−0.23
0.18
−0.21
−6.39
6.11
−0.16
 Total R2 (adjusted)0.11*  0.20*  0.16*  

Note. B and β refer to the unstandardized and standardized partial regression coefficients, respectively, and SE B refers to the standard error of the unstandardized coefficient. All group analyses use controls as the reference value. R2 values refer to the variation accounted for by the model. PDS refers to the Pubertal Development Scale; MES refers to the Morningness- Eveningness Scale; CBCL refers to the Child Behavior Checklist. In this model, the ADHD group is in reference to normal controls. *p  .05. ** p  .001.