Gerbrandij, Albert (2025) Difference in Incidence Rate of Psychotic Disorders between Military Personnel and Civilians. Master thesis, Psychology.
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Abstract
Psychotic disorders are characterized by a period where someone experiences a disconnection from reality. The incidence of psychotic disorders varies greatly between studies. Previous meta-analyses have looked at the overall incidence of psychotic disorders in various population cohorts. However, this current meta-analysis focuses on the difference in incidence of psychosis between army personnel and the general population. Previous studies have shown that traumatic events might lead to a higher risk of developing psychotic disorders. Since army personnel are more prone to encounter these events, one might think that the incidence of psychotic disorders will also be higher in this group. For the meta- analysis we used an existing database to compare incidences of psychotic disorders between army personnel and the general population. The current meta-analysis included three studies in the army personnel group and 97 studies in the general population group. For both groups pooled incidence rates were calculated to compare the groups. The analysis showed a pooled incidence rate of 21,98 per 100.000 person-years for the army personnel group and a pooled incidence rate of 30,91 per 100.000 person-years for the general population group. The difference between both groups was statistically significant (IRR = 0,7113, P < 0,0001, 95% CI [0,6929; 0,7301]). The results indicate that the incidence of psychotic disorders within the military cohort group is lower. Reasons for this might be because of the protective factors and screening tactics in the military. Further research is needed to study whether or not the incidence of psychotic disorders is indeed lower and if so, why that is.
| Item Type: | Thesis (Master) |
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| Supervisor name: | Bruins, J. |
| Degree programme: | Psychology |
| Differentiation route: | Clinical Psychology (CP) [Master Psychology] |
| Date Deposited: | 14 Jul 2025 09:27 |
| Last Modified: | 14 Jul 2025 09:27 |
| URI: | http://gmwpublic.studenttheses.ub.rug.nl/id/eprint/5511 |
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