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. Author manuscript; available in PMC: 2014 Apr 1.
Published in final edited form as: Suicide Life Threat Behav. 2012 Dec 28;43(2):139–149. doi: 10.1111/sltb.12003

Table 2.

Descriptive statistics and the proportion of the sample over the clinical cutoff for individuals reporting nightmares*

Measure N Mean SD Clinical cutoff % over clinical cutoff
Insomnia Symptoms 310 9.45 4.64 15 12.6%
Insomnia Symptom Durationa 302 7.12 24.80 N/A N/A
Nightmares 312 8.85 5.60 11 32.05%
Nightmare Durationb 288 73.93 79.52 N/A N/A
Depressive Symptoms 302 17.99 10.10 16 55.6%
PTSD Symptoms 306 37.16 12.23 50 18.6%
Anxiety Symptoms 306 38.94 8.75 50 12.8%
Suicide risk 307 5.14 3.01 7 22.2%
a

Number of months. Excludes individuals reporting no insomnia symptoms.

b

Number of months. Excludes individuals reporting no nightmares.

*

Statistics are before items involving sleep were removed from the measures of depressive symptoms, PTSD symptoms, and anxiety symptoms.