Table 2.

Prevalence of insomnia disorder and clinical characteristics (N = 5,552)

Variable (n = sample size)	Total %*/M (SD)
ISI ≥ 11 (N = 5,552)	57.2%
ISI ≥ 15—Moderate to Severe	40.5%
PCL-C (n = 3,918)	36.57 (19.29)
PCL-C ≥ 44	32.2%
PCL-5 (n = 1,480)	25.44 (22.62)
PCL-5 ≥ 33	35.8%
Combined PCL above cutoff	33.2%
PHQ-9 ≥ 15 (N = 5,552)	23.3%
Suicidal ideation > 0 (n = 5,532)	14.6%
Audit C
Male (n = 3,982)	3.53 (2.71)
% ≥ 4	44.9%
Female (n = 827)	2.47 (2.34)
% ≥ 3	39.4%
TBI positive (n = 5,366)	25.14%
MST positive (n = 3,423)	11.7%
Pain ≥ 4	69.6%

ISI, insomnia severity index; MST, military sexual trauma; PTSD, posttraumatic stress disorder; PCL, PTSD clinician checklist; TBI, traumatic brain injury; PHQ9, patient health questionnaire 9-Item depression module; Audit, alcohol use disorders identification test.

^*Percentages based on the clinical cutoffs for each of the measures.