Charles-Édouard Giguère

Mr. Charles-Édouard Giguère

orcid

Research Focus & Metrics

Academic Career Length

8Years (2019-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
14 January 2020 in Child and Adolescent Psychiatry and Mental Health
Verified
Journal Article
Open access
PDF file
FLFabienne Ligier
Fabienne Ligier
CGCharles-Édouard Giguère
Charles-Édouard Giguère
CNCharles-Edouard Notredame
Charles-Edouard Notredame
ALAlain Lesage
Alain Lesage
JRJohanne Renaud
Johanne Renaud
MSMonique Séguin
Monique Séguin
Background: Suicide is the third leading cause of death worldwide among youth aged 10- to 19, and mental disorders are often associated in the etiology of suicidal behavior. Mental disorders are often under-diagnosed and under-treated in young people, a situation likely to increase the severity of the disorder and suicide risk. Presence of school difficulties may, in some cases, be a consequence of mental disorder, and theses difficulties are observable. Therefore, early detection and early intervention of school difficulties may alleviate the development of mental disorders and suicide vulnerability. The aim of this study is to understand the link between school difficulties and suicide risk. Methods: We used the data bank gathered by the McGill Group on Suicide Studies over the past two decades through interviews with the relatives of individuals who died by suicide and with individuals from the community as a control group. We included data on common sociodemographic characteristics, life events and mental health characteristics identified before age 18, among individuals who died before the age of 35 or were interviewed before the age of 35. We identified 200 individuals who died by suicide and 97 living controls. We compared groups according to gender and characteristics. Results: Within the total sample, 74% were male, 13% had met with academic failure, 18% had engaged in inappropriate behavior at school, and 18% presented combined school difficulties. Combined school difficulties (academic failure and inappropriate behavior) for both sexes and academic failure alone for males were associated with higher suicide risk before the age of 35. School difficulties generally began in early childhood and were linked to mental disorders/difficulties and substance abuse before age 18. Conclusions: This study underlines the importance for parents, teachers, and educators to identify children with school difficulties—academic failure and behavioral difficulties at school—as early as possible in order to be able to propose adapted interventions. Early identification and proper diagnosis may prevent chronicity of some disorders, accumulation of adverse events, and even suicide.

1 January 2020 in Schizophrenia Research
Verified
Journal Article
Closed access
TLTania Lecomte
Tania Lecomte
MCMarc Corbière
Marc Corbière
CGCharles-Édouard Giguère
Charles-Édouard Giguère
DTDebra Titone
Debra Titone
PLPaul Lysaker
Paul Lysaker

21 April 2022 in Neurobiology of Stress
Verified
Journal Article
Open access
SLSonia Lupien
Sonia Lupien
SLSarah Leclaire
Sarah Leclaire
DMDanie Majeur
Danie Majeur
CRCatherine Raymond
Catherine Raymond
FBFrancelyne Jean Baptiste
Francelyne Jean Baptiste
CGCharles-Édouard Giguère
Charles-Édouard Giguère
Surveys report that about three-quarters of visits to general practitioners in America are for stress-related complaints. Animal and human studies have consistently demonstrated that exposure to acute and/or chronic stress leads to the activation of the autonomic nervous system (ANS) and/or hypothalamic-pituitary-adrenal (HPA) axis, and to the production of catecholamines and glucocorticoids. Yet, many studies performed in humans do not report significant associations between subjective feelings of stress and increases in these stress biomarkers. Consequently, it is not clear whether the stress-related complaints of individuals are associated with significant increases in these stress biomarkers. In the present study, we measured whether individuals who self-identify as being ‘very stressed out’ or ‘zen’ present differences in psychological (depression and anxiety symptoms), biological (basal and reactive levels of glucocorticoids and alpha-amylase) and socioemotional (emotion regulation, mind wandering, personality, resilience and positive mental health) factors associated with stress. Salivary levels of cortisol and alpha-amylase were obtained in the home environment and in reaction to the Trier Social Stress Test in 123 adults aged between 19 and 55 years. All participants completed questionnaires assessing the psychological and socioemotional factors described above. The results showed that groups significantly differed on almost all psychological and socioemotional factors, although we found no significant group differences on biological markers of stress (cortisol or alpha-amylase). These results suggest that when people complain of being ‘very stressed out’, what they may really be alluding to is an experience of psychological distress that is related to poor emotion regulation capacities. It is thus possible that the construct of stress used by people to discuss their internal state of 'stress' is quite different than the construct of stress measured in animal and human laboratories using biomarkers of 'stress'.

1 March 2021 in Journal of Psychosomatic Research
Verified
Journal Article
Closed access
PKPhilippe Kerr
Philippe Kerr
MTMargot Barbosa Da Torre
Margot Barbosa Da Torre
CGCharles-Édouard Giguère
Charles-Édouard Giguère
SLSonia Lupien
Sonia Lupien
RJRobert-Paul Juster
Robert-Paul Juster

2 February 2025 in Psychoneuroendocrinology
Verified
Journal Article
Open access
ABAlexandra Brouillard
Alexandra Brouillard
LDLisa-Marie Davignon
Lisa-Marie Davignon
RCRebecca Cernik
Rebecca Cernik
CGCharles-Édouard Giguère
Charles-Édouard Giguère
HFHelen Findlay
Helen Findlay
MMMarie-France Marin
Marie-France Marin
From a confluence of events, our team acquired salivary sex hormone data from two different assays; namely, enzyme-linked immunosorbent immunoassay (ELISA; Salimetrics) and liquid chromatography-tandem mass spectrometry (LC-MS/MS). As previous research has often discussed inter-assay differences but lacked direct comparative data for these specific hormones in saliva, this paper compared both techniques on their ability to accurately quantify concentrations of estradiol, progesterone, and testosterone in healthy young adults (72 combined oral contraceptive [COC] users, 99 naturally cycling [NC] women in the early follicular and pre-ovulatory phases, and 47 men). Using multivariate and computational approaches, our results converged and showed poor performance of ELISA for measuring salivary sex hormones, with estradiol and progesterone being much less valid than testosterone. Despite its challenges with quantification, LC-MS/MS was found to be superior. Our study underscores the importance of methodological rigor in sex steroid hormone assay techniques, highlighting LC-MS/MS as a more reliable option compared to ELISA for salivary sex hormone quantification in healthy adults. These findings contribute to the ongoing dialogue in the field concerning the validity and reproducibility of scientific discoveries. Indeed, accurate measurement is crucial for generating reliable findings regarding the intricate relationships between hormones, brain, behavior, and mental health.

Verified
Journal Article
Open access
PDF file
JPJean-Francois Pelletier
Jean-Francois Pelletier
LDLarry Davidson
Larry Davidson
CGCharles-Édouard Giguère
Charles-Édouard Giguère
NFNicolas Franck
Nicolas Franck
JBJonathan Bordet
Jonathan Bordet
MRMichael Rowe
Michael Rowe
Several instruments have been developed by clinicians and academics to assess clinical recovery. Based on their life narratives, measurement tools have also been developed and validated through participatory research programs by persons living with mental health problems or illnesses to assess personal recovery. The main objective of this project is to explore possible correlations between clinical recovery, personal recovery, and citizenship by using patient-reported outcome measures. All study participants are currently being treated and monitored after having been diagnosed either with (a) psychotic disorders or (b) anxiety and mood disorders. They have completed questionnaires for clinical evaluation purposes (clinical recovery) will further complete the Recovery Assessment Scale and Citizenship Measure (personal-civic recovery composite index). Descriptive and statistical analyses will be performed to determine internal consistency for each of the subscales, and assess convergent-concurrent validity between clinical recovery, citizenship and personal recovery. Recovery-oriented mental health care and services are particularly recognizable by the presence of Peer Support Workers, who are persons with lived experience of recovery. Upon training, they can personify personalized mental health care and services, that is to say services that are centered on the person’s recovery project and not only on their symptoms. Data from our overall research strategy will lay the ground for the evaluation of the effects of the intervention of Peer Support Workers on clinical recovery, citizenship and personal recovery.