Basic Symptoms Are Associated With Age in Patients With a Clinical High-Risk State for Psychosis: Results From the PRONIA Study


In community studies, both attenuated psychotic symptoms (APS) and basic symptoms (BS) were more frequent but less clinically relevant in children and adolescents compared to adults. In doing so, they displayed differential age thresholds that were around age 16 for APS, around age 18 for perceptive BS, and within the early twenties for cognitive BS. Only the age effect has previously been studied and replicated in clinical samples for APS. Thus, we examined the reported age effect on and age thresholds of 14 criteria-relevant BS in a patient sample at clinical-high risk of psychosis (N = 261, age 15–40 yrs.), recruited within the European multicenter PRONIA-study. BS and the BS criteria, “Cognitive Disturbances” (COGDIS) and “Cognitive-perceptive BS” (COPER), were assessed with the “Schizophrenia Proneness Instrument, Adult version” (SPI-A). Using logistic regressions, prevalence rates of perceptive and cognitive BS, and of COGDIS and COPER, as well as the impact of social and role functioning on the association between age and BS were studied in three age groups (15–18 years, 19–23 years, 24–40 years). Most patients (91.2%) reported any BS, 55.9% any perceptive and 87.4% any cognitive BS. Furthermore, 56.3% met COGDIS and 80.5% COPER. Not exhibiting the reported differential age thresholds, both perceptive and cognitive BS, and, at trend level only, COPER were less prevalent in the oldest age group (24–40 years); COGDIS was most frequent in the youngest group (15–18 years). Functional deficits did not better explain the association with age, particularly in perceptive BS and cognitive BS meeting the frequency requirement of BS criteria. Our findings broadly confirmed an age threshold in BS and, thus, the earlier assumed link between presence of BS and brain maturation processes. Yet, age thresholds of perceptive and cognitive BS did not differ. This lack of differential age thresholds might be due to more pronounced the brain abnormalities in this clinical sample compared to earlier community samples. These might have also shown in more frequently occurring and persistent BS that, however, also resulted from a sampling toward these, i.e., toward COGDIS. Future studies should address the neurobiological basis of CHR criteria in relation to age.

Publication DOI:
Divisions: College of Health & Life Sciences > School of Psychology
Additional Information: © 2020 Walger, Antonucci, Pigoni, Upthegrove, Salokangas, Lencer, Chisholm, Riecher-Rössler, Haidl, Meisenzahl, Rosen, Ruhrmann, Kambeitz, Kambeitz-Ilankovic, Falkai, Ruef, Hietala, Pantelis, Wood, Brambilla, Bertolino, Borgwardt, Koutsouleris and Schultze-Lutter. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Uncontrolled Keywords: Psychiatry,psychosis,clinical high risk,basic symptoms,age,brain maturation
Publication ISSN: 1664-0640
Full Text Link:
Related URLs: https://www.fro ... 020.552175/full (Publisher URL)
PURE Output Type: Article
Published Date: 2020-11-17
Accepted Date: 2020-10-22
Authors: Walger, Helene
Antonucci, Linda A.
Pigoni, Alessandro
Upthegrove, Rachel
Salokangas, Raimo K. R.
Lencer, Rebekka
Chisholm, Katharine (ORCID Profile 0000-0002-0575-0789)
Riecher-Rössler, Anita
Haidl, Theresa
Meisenzahl, Eva
Rosen, Marlene
Ruhrmann, Stephan
Kambeitz, Joseph
Kambeitz-Ilankovic, Lana
Falkai, Peter
Ruef, Anne
Hietala, Jarmo
Pantelis, Christos
Wood, Stephen J.
Brambilla, Paolo
Bertolino, Alessandro
Borgwardt, Stefan
Koutsouleris, Nikolaos
Schultze-Lutter, Frauke



Version: Published Version

License: Creative Commons Attribution

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