Perspectives in Early Intervention
Correlation between attenuated psychotic experiences and depressive symptoms among Japanese students
Article first published online: 10 JUN 2010
© 2010 Blackwell Publishing Asia Pty Ltd
Early Intervention in Psychiatry
Volume 4, Issue 3, pages 200–205, August 2010
How to Cite
Kobayashi, H., Yamazawa, R., Nemoto, T., Murakami, M., Kashima, H. and Mizuno, M. (2010), Correlation between attenuated psychotic experiences and depressive symptoms among Japanese students. Early Intervention in Psychiatry, 4: 200–205. doi: 10.1111/j.1751-7893.2010.00185.x
- Issue published online: 16 AUG 2010
- Article first published online: 10 JUN 2010
- Received 24 September 2009; accepted 11 January 2010
- prodromal symptom;
Aims: To examine the emergence of attenuated psychotic experiences, self-disturbance or affective symptoms among younger subjects in the general population and to investigate the intergroup differences on each symptom between adolescents and post-adolescents.
Methods: A total of 781 participants, 496 university students (mean age: 19.3 ± 1.1 years) and 285 high school students (mean age: 16.0 ± 0.3 years), were administered self-reported questionnaires. Psychotic prodromal symptoms were evaluated using the PRIME Screen-Revised (PS-R), a 12-item self-reported questionnaire. To measure the cognitive, emotional and physical symptoms associated with depression, the Zung Self-rating Depression Scale (ZSDS), a 20-item self-reported questionnaire, was administered.
Results: There were no intergroup differences on the factor score of the PS-R, except the self-demarcation factor (post-adolescents > adolescents), whereas there were significant differences in the factor score of the ZSDS, except for the anxiety factor. Among the post-adolescents, the factors of the PS-R showed a moderate correlation to the cognitive factor on the ZSDS; among the adolescents, the PS-R factors showed a greater correlation to the anxiety factor on the ZSDS than other factors. There were no differences in the distribution of each item of the PS-R between the two groups.
Conclusions: The disturbance of self results in difficulty to precisely objectify, especially among adolescents, which would induce more primitive reactions such as agitation, irritability or anxiety; probably, the self disturbance would become an explicit symptom from an implicit experience with advancing age of the subject. Although these data are only preliminary, they could explain the pathway of progression prior to the onset of psychosis, from disturbance within the self to exaggerated self-absorption.