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. Author manuscript; available in PMC: 2018 Jul 9.
Published in final edited form as: J Trauma Stress. 2015 Jan 28;28(1):8–16. doi: 10.1002/jts.21982

Table 1.

Participant Demographics Separately by Group

PTSD (n = 45)
PI (n = 25)
Controls (n = 27)
Variable M or n SD or % M or n SD or % M or n SD or % Test
Age (years) 35.00 9.14 32.28 7.24 32.15 7.54 F = 1.38
Women 6 13.3 12 48.0 5 18.5 χ2 = 11.2*
    Hispanic/Latino 13 28.9 3 12.0 6 22.2 χ2 = 1.6
Race χ2 = 18.5*
    Caucasian 28 62.2 20 80.0 20 74.1
    Asian 1 2.2 0 0.0 5 18.5
    Black/African American 10 22.2 4 16.0 1 3.7
    Hawaiian or Pacific Islander 4 8.9 0 0.0 0 0.0
    Multiple 2 4.4 1 4.0 1 3.7
Education χ2 = 32.5*
    Partial high school 2 4.4 0 0.0 0 0.0
    High school graduate 14 31.1 1 4.0 1 3.7
    Partial college 20 44.4 8 32.0 4 14.8
    ≥College graduate 9 20.0 16 64.0 22 81.5

Note. PTSD = posttraumatic stress disorder; PI = primary insomnia.

*

p < .05.