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. Author manuscript; available in PMC: 2019 Apr 1.
Published in final edited form as: Am J Psychiatry. 2018 Jul 19;175(10):989–998. doi: 10.1176/appi.ajp.2018.17111199

Table 1. Demographic and Clinical Data From Study Subjects in a Database of 113 MRI Studies Comparing Patients With PTSD to Control Subjectsa.

Variable Pooled Number of Participants in Database Number of Studies Reporting Variable Mean Value or Percentage per Study Between-Study SD
 N   N Mean value  SD
Number of PTSD patients 2,685 113 23.8 16.3
Number of nontraumatized control subjects 2,250   73 30.8 27.8
Number of traumatized control subjects 1,646   64 25.7 19.7
Age (years)
    Patients, mean 108 36.2 13.6
    Patients, SD 102   7.3   3.5
    Nontraumatized control subjects, mean   72 34.4 15.6
    Nontraumatized control subjects, SD   68   7.0   4.0
    Traumatized control subjects, mean   61 40.2 11.7
    Traumatized control subjects, SD   57   7.7   3.5
PTSD patients
    Age at illness onset (years)   24 24.2 13.7
    Time since trauma (years)   32   9.0 11.0
    Duration of illness (years)   29   8.0   7.1
    Clinician-Administered PTSD Scale score   65 68.2 12.6
 N   N  Mean %  SD
    Medication status
        Medication free 1,696   79 89.0 23.3
        Antidepressant    247   86 11.1 21.5
        Mood stabilizer     31   80   1.3   5.3
        Antipsychotic     18   81   0.9   5.7
Female patients    993 107 42.0 35.4
Female nontraumatized control subjects 1,044   71 45.7 37.3
Female traumatized control subjects    518   59 33.8 35.1