Journal article
Impulsivity in unaffected adolescent biological relatives of schizophrenia patients
Journal of psychiatric research, Vol.97, pp.47-53
02/2018
DOI: 10.1016/j.jpsychires.2017.11.008
PMCID: PMC5742548
PMID: 29175297
Abstract
Although schizophrenia is not a prototypic impulse-control disorder, patients report more impulsive behaviors, have higher rates of substance use, and show dysfunction in brain circuits that underlie impulsivity. We investigate impulsivity in unaffected biological relatives of schizophrenia patients to further understand the relationships between schizophrenia risk and impulse control during adolescence.
Group differences in impulsivity (UPPS-P Impulsive Behavior Scale and delay discounting) were tested in 210 adolescents contrasting 39 first- and 53 second-degree biological relatives of schizophrenia patients, and 118 subjects with no schizophrenia family history (NSFH).
Compared to NSFH adolescents and to second-degree relatives, first-degree relatives of schizophrenia patients had increased impulsivity-related behaviors (higher UPPS-P Perseverance, Positive Urgency and Premeditation subscale scores) and greater preference for immediate rewards (smaller AUC and larger discounting constant). Second-degree relatives did not differ significantly from NSFH adolescents on self-report impulsive behaviors or on measures of impulsive decision-making. These group differences remained even after careful consideration of potential confounding factors.
Impulsivity is associated with schizophrenia risk, and its severity increases with greater familial relatedness to the schizophrenia proband. Additional studies are needed to understand the role impulsivity may play in mediating schizophrenia susceptibility during adolescence.
Details
- Title: Subtitle
- Impulsivity in unaffected adolescent biological relatives of schizophrenia patients
- Creators
- Beng-Choon Ho - Roy J. and Lucille A. Carver College of MedicineAmy B Barry - Roy J. and Lucille A. Carver College of MedicineJulie A Koeppel - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of psychiatric research, Vol.97, pp.47-53
- DOI
- 10.1016/j.jpsychires.2017.11.008
- PMID
- 29175297
- PMCID
- PMC5742548
- ISSN
- 0022-3956
- eISSN
- 1879-1379
- Grant note
- R01 MH097751 / NIMH NIH HHS
- Language
- English
- Date published
- 02/2018
- Academic Unit
- Psychiatry
- Record Identifier
- 9984280837602771
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