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Neurological soft signs in Tunisian patients with first-episode psychosis and relation with cannabis use

Overview of attention for article published in Annals of General Psychiatry, July 2017
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Title
Neurological soft signs in Tunisian patients with first-episode psychosis and relation with cannabis use
Published in
Annals of General Psychiatry, July 2017
DOI 10.1186/s12991-017-0153-3
Pubmed ID
Authors

Ahmed Mhalla, Bochra Ben Mohamed, Christoph U. Correll, Badii Amamou, Anouar Mechri, Lotfi Gaha

Abstract

Neurological soft signs (NSS) are minor non-localizing neurological abnormalities that are conceptualized as neurodevelopmental markers that mediate the biological risk for psychosis. We aimed to explore the relationship between NSS and cannabis use, an environmental risk factor of psychosis. This was a cross-sectional study in consecutively admitted patients hospitalized for first-episode psychosis. NSS were assessed by the NSS scale (23 items exploring motor coordination, motor integrative function, sensory integration, involuntary movements or posture, quality of lateralization). Presence of NSS was defined as a NSS scale total score ≥9.5. Cannabis use was ascertained with the cannabis subsection in the Composite International Diagnostic Interview. Among 61 first-episode psychosis patients (mean age = 28.9 ± 9.4 years; male = 86.9%, antipsychotic-naïve = 75.4%), the prevalence of current cannabis use was 14.8% (heavy use = 8.2%, occasional use = 6.6%). NSS were present in 83.6% of the sample (cannabis users = 66.7% versus cannabis non-users = 85.5%, p = 0.16). The mean total NSS score was 15.3 ± 6.7, with a significant lower total NSS score in cannabis users (11.2 ± 5.6 versus 16.0 ± 6.7, p = 0.048). Differences were strongest for the "motor coordination" (p = 0.06) and "involuntary movements" (p = 0.07) sub-scores. This study demonstrated a negative association between cannabis use and NSS, especially regarding motor discoordination. This finding supports the hypothesis that a strong environmental risk factor, such as cannabis, may contribute to the onset of psychosis even in the presence of lower biological and genetic vulnerability, as reflected indirectly by lower NSS scores. Nevertheless, additional studies are needed that explore this interaction further in larger samples and considering additional neurobiological and environmental risk factors.

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Geographical breakdown

Country Count As %
Unknown 50 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 9 18%
Student > Bachelor 8 16%
Student > Postgraduate 5 10%
Other 3 6%
Student > Doctoral Student 3 6%
Other 11 22%
Unknown 11 22%
Readers by discipline Count As %
Medicine and Dentistry 13 26%
Psychology 7 14%
Neuroscience 5 10%
Social Sciences 3 6%
Pharmacology, Toxicology and Pharmaceutical Science 2 4%
Other 5 10%
Unknown 15 30%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 21 July 2017.
All research outputs
#18,562,247
of 22,990,068 outputs
Outputs from Annals of General Psychiatry
#366
of 513 outputs
Outputs of similar age
#239,297
of 312,615 outputs
Outputs of similar age from Annals of General Psychiatry
#2
of 3 outputs
Altmetric has tracked 22,990,068 research outputs across all sources so far. This one is in the 11th percentile – i.e., 11% of other outputs scored the same or lower than it.
So far Altmetric has tracked 513 research outputs from this source. They typically receive more attention than average, with a mean Attention Score of 8.3. This one is in the 17th percentile – i.e., 17% of its peers scored the same or lower than it.
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