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Table 3 Correlations among the study variables

From: The moderating roles of bedtime activities and anxiety/depression in the relationship between attention-deficit/hyperactivity disorder symptoms and sleep problems in children

Main variables

1

2

3

4

5

6

1. ADHD symptoms

1

     

2. Sleep problems

.48***

     

3. Sleep length (weekday)

−.11*

−.10+

    

4. Sleep length (weekend)

.01

.06

.21***

   

5. Bedtime activities (screen)

.05

.08+

.02

−.02

  

6. Bedtime activities (diet)

.14**

.12*

.04

−.02

.55***

 

7. Anxiety/depression

.24***

.69***

−.08+

0

.05

.08+

  1. +P < 0.1, *P < 0.05, **P < 0.001, ***P < 0.0001