Cannabis and psychosis in acute psychiatric admissions
Robert F. Grace, Gillian Shenfield, Christopher C Tennant
Drug and Alcohol Review September 1, 2000 DOI: 10.1080/713659372 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Observational cohort Peer reviewed |
|---|---|
| Sample size | 62 |
| Population | Acute psychiatric inpatients suspected of illicit drug use who had urinary drug screens |
| Topics | Cannabis |
| Key findings | THC-positive status was not significantly associated with psychosis or with length of admission, but THC-positive patients with recurrent psychosis were significantly younger and had a significantly shorter interval since last admission (10 months vs 33 months), suggesting faster relapse. |
Abstract
Abstract: This study assessed the duration of admission and time to relapse in 62 acute psychiatric in‐patients who had urinary drug screens performed because of suspicion of illicit drug use. Some 51% of those with psychosis (n = 45) and 29% of those with non‐psychotic illness (n = 17) were THC‐positive although this was not significant. In those with recurrent admissions for psychosis tetrahydrocannabinol (THC)‐positive subjects were significantly younger. The duration of admission was 7 days shorter in the THC‐positive group but this was not significant. Their duration since last admission (rapidity of relapse) was 10 months versus 33 months which was significant.
Comparable studies
Other observational and cohort studies on cannabis, most cited first.
| Study | Year | Design | Participants |
|---|---|---|---|
| High-potency cannabis and the risk of psychosis People with first episode of psychosis and healthy controls from the local population | 2009 | Case-control study | n = 454 |
| Ayahuasca-Assisted Therapy for Addiction: Results from a Preliminary Observational Study in Canada Rural aboriginal population | 2013 | Observational study | |
| Impaired cognitive performance in drug free users of recreational ecstasy (MDMA) Otherwise healthy young people | 2000 | Observational | |
| Continued cannabis use and risk of incidence and persistence of psychotic symptoms: 10 year follow-up cohort study Individuals from the general population in Germany aged 14-24 at baseline | 2011 | Observational cohort | n = 1,923 |
| Cannabis-induced psychosis and subsequent schizophrenia-spectrum disorders: follow-up study of 535 incident cases Patients treated for cannabis-induced psychotic symptoms in Denmark between 1994 and... | 2005 | Observational cohort | n = 535 |