Obsessive compulsive symptoms in patients with Schizophrenia on Clozapine and with Obsessive Compulsive disorder: a comparison study.

Abstract

Obsessive compulsive symptoms are commonly reported in those with schizophrenia. Clozapine has previously been reported to induce, aggravate and alleviate these symptoms. It is unclear if these are similar to the symptoms experienced by those with obsessive compulsive disorder. This study describes the obsessive compulsive symptom profile of a population of patients with schizophrenia treated with clozapine (n = 62) and compares this with patients with Obsessive Compulsive Disorder (n = 35). All participants were attending an outpatient community mental health service. The Obsessive Compulsive Inventory (which measures the frequency and associated distress of a range of "behavioural" and "cognitive" symptoms), the Hospital Anxiety and Depression Scale and a demographic questionnaire were completed. In addition the schizophrenia group treated with clozapine completed the Brief Psychiatric Rating Scale. The OCD group reported significantly more symptoms for all OCI subscales compared to the clozapine group. Overall fourteen (22%) of the schizophrenia treated with clozapine group had clinically significant total OCI scores. Two (3%) had documented OCS pre clozapine. De novo OCS was reported in twelve (19%) cases. Nine (11%) had documented OC symptoms pre-clozapine while only two (3%) had symptoms after clozapine was initiated. In terms of OC symptom profile, the clozapine group scored highest on the Doubting scale, a cognitive symptom whereas the OCD group scored highest on Washing, a behavioural symptom. Both groups reported greater distress with cognitive rather than behavioural symptoms. Medication including clozapine dose was not correlated with symptom severity. Anxiety correlated highly with obsessive compulsive symptoms in the Clozapine group but not the OCD group. Within the Clozapine group, Obsessing correlated highly with Unusual Thought Content. Findings suggest that obsessive compulsive symptoms in the Clozapine group may reflect a subtype of 'schizo-obsessive' disorder.

• Authors: Mairead Doyle, Aoife Ni Chorcorain, Eleanor Griffith, Tim Trimble, Eadbard O'Callaghan
• Journal: Comprehensive psychiatry (Compr Psychiatry) Vol. 55 Issue 1 Pg. 130-6 (Jan 2014) ISSN: 1532-8384 [Electronic] United States
• PMID: 24209980 (Publication Type: Comparative Study, Journal Article, Observational Study)
• Copyright: © 2014 Elsevier Inc. All rights reserved.

Chemical References

• Antipsychotic Agents
• Clozapine

Topics

• Adult
• Antipsychotic Agents (therapeutic use)
• Clozapine (therapeutic use)
• Compulsive Behavior (complications, drug therapy)
• Cross-Sectional Studies
• Female
• Humans
• Male
• Middle Aged
• Obsessive Behavior (complications, drug therapy)
• Obsessive-Compulsive Disorder (complications, drug therapy)
• Schizophrenia (complications, drug therapy)
• Severity of Illness Index