Table 3.
Correlations of study variables
| Variable | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
| 1. Insomnia Symptoms | - | .22** | .36** | .00 | .52** | .50** | .61** | .26** |
| 2. Insomnia Duration | .24** | - | .13** | .07 | .14** | .10* | .12** | .23** |
| 3. Nightmare Symptoms | .32** | .14* | - | .03 | .33** | .44** | .46** | .25** |
| 4. Nightmare Duration | .00 | .07 | .05 | - | .08 | .08 | .01 | .16** |
| 5. Depressive Symptoms | .52** | .17** | .37** | .09 | - | .74** | .78** | .47** |
| 6. PTSD Symptoms | .44** | .12* | .42** | .08 | .72** | - | .77** | .43** |
| 7. Anxiety Symptoms | .62** | .13* | .41** | .01 | .79** | .75** | - | .35** |
| 8. Suicide risk | .23** | .31** | .21** | .17** | .50** | .42** | .34** | - |
*
p <.05,
**
p < .01.
Correlations for the insomnia symptom sample are above the diagonal and correlations for the nightmare sample are below the diagonal. Sample sizes ranged from 665–291, with the missing data being primarily due to reporting nightmare duration for those individuals without nightmares as missing. Correlations are after overlapping items were removed from the control variables.