. 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 1.

Descriptive statistics and the proportion of the sample over the clinical cutoff for those reporting at least one insomnia symptom^*

Measure	N	Mean	SD	Clinical cutoff	% over clinical cutoff
Insomnia Symptoms	660	8.17	4.58	15	9.9%
Insomnia Symptom Duration^a	654	5.16	21.85	N/A	N/A
Nightmares	654	4.14	5.81	11	15.1%
Nightmare Duration^b	283	73.38	79.17	N/A	N/A
Depressive Symptoms	636	15.53	9.97	16	44.3%
PTSD Symptoms	648	32.72	11.81	50	11.6%
Anxiety Symptoms	649	35.76	8.57	50	7.7%
Suicide risk	652	4.63	2.65	7	16.6%

Number of months. Excludes individuals reporting no insomnia symptoms.

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.