Table 1.
Description of moderators and inclusion rate
| Meta-regression | ||
|---|---|---|
| Moderator | Description | Inclusion rate (%)a |
| Age | Mean age | 83.72 |
| Gender | Percent female | 90.68 |
| Length of measurement | Mean recording time (min) | 81.40 |
| Obesity | Mean BDI (PTSD) | 18.60 |
| Sampling rate | Sampling frequency (Hz) | 54.76 |
| Smoking | Percent smoking status % (PTSD) | 25.58 |
| PTSD severity | Mean value CAPS (DSM-IV) | 23.26 |
| Subgroup analysis | ||
| Moderator | Subgroups | Inclusion rate (%)a |
| Control group | Healthy control / Trauma exposed (no PTSD) / Mixed |
88.37 |
| Comorbidities (in PTSD group) | Reported / Not reported |
25.58 |
| DSM measure | DSM III / DSM-IV DSM 5 |
65.12 |
| PTSD measure | Clinical interview / Self report | 93.02 |
| Type of participants | Veterans / Others / Mixed |
72.09 |
| Medication | Reported / Not reported |
60.47 |
| Presence of stress task | Present / Not present |
93.02 |
| Study design | Laboratory / Ambulatory assessment |
90.70 |
| Type of trauma | Interpersonal / Non-interpersonal / Mixed |
76.74 |
| Recording position | Supine / Sitting |
51.16 |
| Sleep measures | Yes / No | 11.63 |
| Dissociative symptoms | Reported / Not reported |
6.98 |
a
Inclusion rate = percent of studies reporting information on the moderator.