Table 3. Correlations of Study Variablesa.
| Variable | Short Sleep Duration, Age 8 y | P Value | Short Sleep Duration, Age 10 y | P Value | Short Sleep Duration, Age 12 y | P Value | Symptoms of Emotional Disorders, Age 6 y | P Value | Symptoms of Emotional Disorders, Age 8 y | P Value | Symptoms of Emotional Disorders, Age 10 y | P Value | Symptoms of Emotional Disorders, Age 12 y | P Value | Symptoms of Behavioral Disorders, Age 6 y | P Value | Symptoms of Behavioral Disorders, Age 8 y | P Value | Symptoms of Behavioral Disorders, Age 10 y | P Value | Symptoms of Behavioral Disorders, Age 12 y | P Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Short sleep duration, age 6 y | 0.38 | <.001 | 0.38 | <.001 | 0.29 | <.001 | −0.08 | .05 | −0.08 | .10 | 0.04 | .28 | 0.07 | .09 | −0.07 | .06 | −0.05 | .23 | −0.06 | .22 | 0.05 | .22 |
| Short sleep duration, age 8 y | NA | NA | 0.45 | <.001 | 0.36 | <.001 | −0.11 | .008 | −0.12 | .01 | −0.11 | .008 | −0.07 | .10 | −0.12 | .003 | −0.10 | .01 | −0.11 | .02 | −0.06 | .13 |
| Short sleep duration, age 10 y | NA | NA | NA | NA | 0.44 | <.001 | –0.12 | .002 | –0.11 | .006 | –0.11 | .01 | −0.03 | .59 | −0.11 | .01 | −0.03 | .45 | −0.11 | .006 | −0.08 | .06 |
| Short sleep duration, age 12 y | NA | NA | NA | NA | NA | NA | –0.06 | .30 | –0.07 | .13 | –0.02 | .74 | −0.03 | .51 | −0.11 | .02 | −0.01 | .83 | −0.01 | .03 | 0.01 | .89 |
| Symptoms of emotional disorders, age 6 y | NA | NA | NA | NA | NA | NA | NA | NA | 0.33 | <.001 | 0.25 | <.001 | 0.23 | <.001 | 0.50 | <.001 | 0.33 | <.001 | 0.29 | <.001 | 0.29 | <.001 |
| Symptoms of emotional disorders, age 8 y | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 0.35 | <.001 | 0.37 | <.001 | 0.35 | <.001 | 0.47 | <.001 | 0.36 | <.001 | 0.39 | <.001 |
| Symptoms of emotional disorders, age 10 y | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 0.45 | <.001 | 0.27 | <.001 | 0.32 | <.001 | 0.41 | <.001 | 0.39 | <.001 |
| Symptoms of emotional disorders, age 12 y | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 0.22 | <.001 | 0.24 | <.001 | 0.33 | <.001 | 0.52 | <.001 |
| Symptoms of behavioral disorders, age 6 y | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 0.59 | <.001 | 0.52 | <.001 | 0.46 | <.001 |
| Symptoms of behavioral disorders, age 8 y | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 0.66 | <.001 | 0.55 | <.001 |
| Symptoms of behavioral disorders, age 10 y | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 0.66 | <.001 |
| Symptoms of behavioral disorders, age 12 y | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
Abbreviation: NA, not applicable.
a
Values represents Pearson correlations with accompanying P values.