Table 3.
Subgroup analysis of the prevalence of current PTSD among patients with schizophrenia
| Variables | N | Mean prevalence (%) | 95% CI (%) | p | Q | I2 | |
|---|---|---|---|---|---|---|---|
| Objective | |||||||
| Psychosis/involuntary admission | 2 | 51.7 | 43.6–59.7 | 0.917 | 0.0 | 0.0 | |
| PTSD | 8 | 16.9 | 14.2–19.9 | 0.375 | 7.5 | 7.1 | |
| Various anxiety disorders | 4 | 1.1 | 0.3–3.3 | 0.941 | 0.4 | 0.0 | |
| Various psychiatric disorders | 4 | 2.3 | 1.0–5.5 | 0.207 | 4.5 | 34.1 | |
| Recruitment | |||||||
| Consecutive | 10 | 6.1 | 2.4–14.4 | <0.001 | 74.7 | 87.9 | |
| Not reported | 8 | 17.2 | 9.3–29.7 | <0.001 | 62.3 | 88.8 | |
| Diagnostic criteria | |||||||
| DSM-III-R | 4 | 31.8 | 13.8–57.5 | <0.001 | 28.1 | 89.3 | |
| DSM-IV | 13 | 9.6 | 6.1–14.9 | <0.001 | 48.2 | 75.1 | |
| ICD-10 | 1 | 1.1 | 0.2–7.2 | >0.999 | 0.0 | 0.0 | |
| Diagnostic interview | |||||||
| CAPS | 4 | 22.6 | 10.6–41.6 | <0.001 | 24.0 | 87.5 | |
| MINI | 3 | 2.8 | 1.1–6.9 | 0.437 | 1.6 | 0.0 | |
| SCID | 9 | 7.0 | 3.6–13.0 | <0.001 | 31.1 | 74.3 | |
| PSS-I | 1 | 27.3 | 17.2–40.4 | >0.999 | 0.0 | 0.0 | |
| PTSD-I | 1 | 51.4 | 41.9–60.8 | >0.999 | 0.0 | 0.0 | |
N, number; CI, confidence interval; PTSD, posttraumatic stress disorder; DSM, Diagnostic and Statistical Manual; ICD-10, International Classification of Diseases, 10th Revision; CAPS, Clinician-Administered PTSD Scale; MINI, Mini International Neuropsychiatric Interview; SCID, Structured Clinical Interview for DSM Disorders; PSS-I, PTSD Symptom Scale-Interview; PTSD-I, PTSD Interview