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Risk of transition to schizophrenia following first admission with substance-induced psychotic disorder: a population-based longitudinal cohort study.

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Title: Risk of transition to schizophrenia following first admission with substance-induced psychotic disorder: a population-based longitudinal cohort study.
Authors: Alderson, H. L., Semple, D. M., Blayney, C., Queirazza, F., Chekuri, V., Lawrie, S. M.
Source: Psychological Medicine. Oct2017, Vol. 47 Issue 14, p2548-2555. 8p.
Subjects: Schizophrenia risk factors, Psychoses, Age distribution, Diagnosis, Diseases, Longitudinal method, Neurobehavioral disorders, Sex distribution, Substance abuse, Descriptive statistics, Population-based case control, Prognosis
Abstract: Background. The potential for drugs of abuse to induce acute psychotic symptoms is well recognised. However, the likelihood of transition from initial substance-induced psychotic disorder (SIPD) to chronic psychosis is much less well understood. This study investigated the rate of SIPD transition to schizophrenia (F20), the time to conversion and other possible related factors. Methods. Using data from the Scottish Morbidity Record, we examined all patients (n = 3486) since their first admission to psychiatric hospital with a diagnosis of SIPD [International Classification of Diseases, Tenth Revision (ICD-10) codes F10-F19, with third digit five] from January 1997 to July 2012. Patients were followed until first episode of schizophrenia (ICD-10 code F20, with any third digit) or July 2012. Any change in diagnosis was noted in the follow-up period, which ranged from 1 day to 15.5 years across the groups. Results. The 15.5-year cumulative hazard rate was 17.3% (S.E. = 0.007) for a diagnosis of schizophrenia. Cannabis, stimulant, opiate and multiple drug-induced psychotic disorder were all associated with similar hazard rates. The mean time to transition to a diagnosis of schizophrenia was around 13 years, although over 50% did so within 2 years and over 80% of cases presented within 5 years of SIPD diagnosis. Risk factors included male gender, younger age and longer first admission. Conclusions. SIPD episodes requiring hospital admission for more than 2 weeks are more likely to be associated with later diagnosis of schizophrenia. Follow-up periods of more than 2 years are needed to detect the majority of those individuals who will ultimately develop schizophrenia. [ABSTRACT FROM AUTHOR]
Copyright of Psychological Medicine is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Risk of transition to schizophrenia following first admission with substance-induced psychotic disorder: a population-based longitudinal cohort study.
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  Data: <searchLink fieldCode="AR" term="%22Alderson%2C+H%2E+L%2E%22">Alderson, H. L.</searchLink><br /><searchLink fieldCode="AR" term="%22Semple%2C+D%2E+M%2E%22">Semple, D. M.</searchLink><br /><searchLink fieldCode="AR" term="%22Blayney%2C+C%2E%22">Blayney, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Queirazza%2C+F%2E%22">Queirazza, F.</searchLink><br /><searchLink fieldCode="AR" term="%22Chekuri%2C+V%2E%22">Chekuri, V.</searchLink><br /><searchLink fieldCode="AR" term="%22Lawrie%2C+S%2E+M%2E%22">Lawrie, S. M.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Psychological+Medicine%22">Psychological Medicine</searchLink>. Oct2017, Vol. 47 Issue 14, p2548-2555. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Schizophrenia+risk+factors%22">Schizophrenia risk factors</searchLink><br /><searchLink fieldCode="DE" term="%22Psychoses%22">Psychoses</searchLink><br /><searchLink fieldCode="DE" term="%22Age+distribution%22">Age distribution</searchLink><br /><searchLink fieldCode="DE" term="%22Diagnosis%22">Diagnosis</searchLink><br /><searchLink fieldCode="DE" term="%22Diseases%22">Diseases</searchLink><br /><searchLink fieldCode="DE" term="%22Longitudinal+method%22">Longitudinal method</searchLink><br /><searchLink fieldCode="DE" term="%22Neurobehavioral+disorders%22">Neurobehavioral disorders</searchLink><br /><searchLink fieldCode="DE" term="%22Sex+distribution%22">Sex distribution</searchLink><br /><searchLink fieldCode="DE" term="%22Substance+abuse%22">Substance abuse</searchLink><br /><searchLink fieldCode="DE" term="%22Descriptive+statistics%22">Descriptive statistics</searchLink><br /><searchLink fieldCode="DE" term="%22Population-based+case+control%22">Population-based case control</searchLink><br /><searchLink fieldCode="DE" term="%22Prognosis%22">Prognosis</searchLink>
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  Label: Abstract
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  Data: Background. The potential for drugs of abuse to induce acute psychotic symptoms is well recognised. However, the likelihood of transition from initial substance-induced psychotic disorder (SIPD) to chronic psychosis is much less well understood. This study investigated the rate of SIPD transition to schizophrenia (F20), the time to conversion and other possible related factors. Methods. Using data from the Scottish Morbidity Record, we examined all patients (n = 3486) since their first admission to psychiatric hospital with a diagnosis of SIPD [International Classification of Diseases, Tenth Revision (ICD-10) codes F10-F19, with third digit five] from January 1997 to July 2012. Patients were followed until first episode of schizophrenia (ICD-10 code F20, with any third digit) or July 2012. Any change in diagnosis was noted in the follow-up period, which ranged from 1 day to 15.5 years across the groups. Results. The 15.5-year cumulative hazard rate was 17.3% (S.E. = 0.007) for a diagnosis of schizophrenia. Cannabis, stimulant, opiate and multiple drug-induced psychotic disorder were all associated with similar hazard rates. The mean time to transition to a diagnosis of schizophrenia was around 13 years, although over 50% did so within 2 years and over 80% of cases presented within 5 years of SIPD diagnosis. Risk factors included male gender, younger age and longer first admission. Conclusions. SIPD episodes requiring hospital admission for more than 2 weeks are more likely to be associated with later diagnosis of schizophrenia. Follow-up periods of more than 2 years are needed to detect the majority of those individuals who will ultimately develop schizophrenia. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Psychological Medicine is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=125166029
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        Value: 10.1017/S0033291717001118
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        Text: English
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        Type: general
      – SubjectFull: Psychoses
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      – SubjectFull: Age distribution
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      – SubjectFull: Neurobehavioral disorders
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      – SubjectFull: Sex distribution
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      – SubjectFull: Substance abuse
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              Text: Oct2017
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