Antipsychotic drugs v. barbiturates or benzodiazepines used as active placebos for schizophrenia: a systematic review and meta-analysis

BACKGROUND

Comparisons of antipsychotics with placebo can be biased by unblinding due to side effects. Therefore, this meta-analysis compared the efficacy of antipsychotics for acute schizophrenia in trials using barbiturates or benzodiazepines as active placebos.

METHODS

Randomized controlled trials (RCTs) in acute schizophrenia with at least 3 weeks duration and comparing any antipsychotic with barbiturates or benzodiazepines were eligible. ClinicalTrials.gov, CENTRAL, EMBASE, MEDLINE, PsycINFO, PubMed, WHO-ICTRP as well as previous reviews were searched up to 9 January 2018. Two separate meta-analyses, one for barbiturates and one for benzodiazepines, were conducted using random-effects models. The primary outcome was response to treatment, and mean values of schizophrenia rating scales and dropouts were analyzed as secondary outcomes. This study is registered with PROSPERO (CRD42018086263).

RESULTS

Seven barbiturate-RCTs (number of participants n = 1736), and two benzodiazepine-RCTs (n = 76) were included in the analysis. The studies were published between 1960 and 1968 and involved mainly chronically ill patients. More patients on antipsychotics in comparison to barbiturates achieved a 'good' response (36.2% v. 16.8%; RR 2.15; 95% CI 1.36-3.41; I2 = 48.9) and 'any' response (57.4% v. 27.8%; RR 2.07; 95% CI 1.35-3.18; I2 = 68.2). In a single small trial (n = 60), there was no difference between antipsychotics and benzodiazepines on 'any' response (74.7% v. 65%; RR 1.15; 95% CI 0.82-1.62).

CONCLUSIONS

Antipsychotic drugs were more efficacious than barbiturates, based on a large sample size. Response ratios were similar to those observed in placebo-controlled trials. The results on benzodiazepines were inconclusive due to the small number of studies and participants.

Post-traumatic stress disorder and subthreshold post-traumatic stress disorder in recent male asylum seekers: An expected but overlooked "European" epidemic

The literature shows an increased risk for post-traumatic stress disorder (PTSD) among illegal migrants. We aimed to estimate the prevalence of PTSD, subthreshold PTSD, the degree of disability, and differences in sociodemographic and anamnestic characteristics associated with these clinical conditions in a sample of newly arrived migrants. Two hundred male asylum seekers from West sub-Saharan Africa were evaluated for traumatic life events, PTSD symptoms, and disability through the Life Events Checklist for DSM-5 (LEC-5), the Primary Care PTSD Screen, the PTSD Checklist for DSM-5, and the World Health Organization Disability Assessment Schedule 2.0 (WHODAS 2.0). The current prevalence of PTSD and subthreshold PTSD was 9.5% and 12.0%, respectively. PTSD and subthreshold PTSD subgroups presented higher WHODAS 2.0 scores and LEC-5 events, an over-representation of individuals with childhood adversities and an excess of premigration psychiatric contacts unrelated to PTSD spectrum disorders and peri-migration offences. Witnessing a traumatic event and disability in understanding and communication predicted both the presence of PTSD symptoms and PTSD status. PTSD spectrum disorders should be considered among the clinical emergencies associated with asylum seeker condition, and targeted interventions also involving the host citizens should be predisposed.