Chadi, N., Castellanos-Ryan, N., & Geoffroy, MC. (2022). COVID-19 and the impacts on youth mental health: Emerging evidence from longitudinal studies. Canadian Journal of Public Health. 1–9. doi: 10.17269/s41997-021-00567-8

Côté, S. M., Geoffroy, MC., Haeck, C., Ouellet-Morin, I., Larose, S., Chadi, N., … & Mâsse, B. (2022). Understanding and attenuating pandemic-related disruptions: a plan to reduce inequalities in child development. Canadian Journal of Public Health, 1-13. doi: 10.17269/s41997-021-00584-7

Pocuca, N., London-Nadeau, K., Geoffroy, MC., Chadi, N., Séguin, J. R., Parent, S., Boivin, M., Tremblay, R. E., Côté, S. M., Castellanos Ryan, N. (In press). Changes in emerging adults’ alcohol and cannabis use from before to during the COVID-19 pandemic: Evidence from a prospective birth cohort. Psychology of Addictive Behaviors.

Paquin, V., Bolanis, D., Courtemanche, Y., Castellanos-Ryan, N., Boivin, M., Tremblay, R., Côté, S., Muckle, G., & Geoffroy, MC. (2021). Longitudinal trajectories of food insecurity in childhood and their associations with mental health and functioning in adolescence. JAMA Network Open, 4(12), e2140085. doi: 10.1001/jamanetworkopen.2021.40085

Oncioiu, S. I., Boivin, M., Geoffroy, MC., Arseneault, L., Galéra, C., Navarro, M. C., Brendgen, M., Vitaro, F., Tremblay, R. E., Côté S. M., Orri, M. (2021). Mental health comorbidities following peer victimization across childhood and adolescence: A 20-year longitudinal study. Psychological medicine, 1–13. Advance online publication. doi: 10.1017/S0033291721003822

Orri, M., Vergunst, F., Turecki, G., Galera, C., Latimer, E., Bouchard, S., Domond, P., Vitaro, F., Algan, Y., Tremblay, R. E., Geoffroy, MC., Côté, S. M. (2021). Long-term economic and social outcomes of youth suicide attempt. British Journal of Psychiatry. 1–7. doi:10.1192/bjp.2021.133

Watkins-Martin, K., Orri, M., Pennestri, H., Castellanos-Ryan, N., Larose, S., Gouin, J.P., Ouellet-Morin, I., Philippe, F., Boivin, M., Tremblay, R.E., Côté, S. & Geoffroy, MC. (2021). Depression and anxiety symptoms in young adults before and during the COVID-19 pandemic: Evidence from a Canadian population-based cohort. Annals of General Psychiatry, 20(42). doi: 10.1186/s12991-021-00362-2

Rioux, C., Huet, A-S., Castellanos-Ryan, N., Fortier, L., Le Blanc, M., Hamaoui, S., Geoffroy, MC., Renaud, J., & Séguin, J. R. (2021). Systematic review and meta-analysis: The direction of the association between substance use disorders and suicidality in youth. Plos One, 16(8), e0255799. doi: 10.1371/journal.pone.0255799

Brillon, P., Philippe, F.L., Paradis, A., Geoffroy, MC., Orri, M., & Ouellet-Morin, I. (2021). Psychological distress of mental health workers during the COVID-19 pandemic: A comparison with the general population in high and low-incidence regions. Journal of Clinical Psychology. Advance online publication. doi: 10.1002/jclp.23238 

Commisso, M., Temcheff, C., Orri, M., Poirier, M., Lau, M., Côté, S., Vitaro, F., Turecki, G., Tremblay, R., Geoffroy, MC. (2021). Childhood externalizing, internalizing and comorbid problems: Distinguishing young adults who think about suicide from those who attempt suicide. Psychological Medicine, 1–8. doi:10.1017/S0033291721002464  

Perret, L.C., Ki, M., Commisso, M., Chon, D., Scardera, S., Kim, W., Fuhrer, R., Gariepy, G., Ouellet-Morin, I., & Geoffroy, MC. (2021). Perceived friend support buffers against symptoms of depression in peer victimized adolescents: Evidence from a population-based cohort in South Korea. Journal of Affective Disorders, 291, 24–31. doi: 10.1016/j.jad.2021.04.078

Gifuni, AJ., Chakravarty, MM., Lepage, M., Ho, TC., Geoffroy, MC, Lacourse, E., Gotlib, I.H., Turecki, G., Renaud, J., Jollant, F. (2021). Brain cortical and subcortical morphology in depressed adolescents with a history of suicide attempt. Journal of Psychiatry and Neuroscience, 46(30), E347–357. doi:10.1503/jpn.200198

Navarro, M., Ouellet-Morin, I., Geoffroy, MC., Boivin, M., Tremblay, R. E., Côté, S. M., & Orri, M. (2021). Machine learning assessment of early life factors predicting suicide attempt in adolescence or young adulthood. JAMA Network Open, 4(3), e211450–e211450. doi: 10.1001/jamanetworkopen.2021.1450

Orri, M., Chadi, N., Ahun, MN., Seguin, J.R., Tremblay, R.E., Boivin M, Turecki, G., Geoffroy. MC., Côté, S.M. (2021) Risk of suicidal ideation and attempt for children exposed to maternal smoking during pregnancy and childhood: A 20-year population-based cohort study. Journal of Affective disorders, 286, 10­–18. doi: 10.1016/j.jad.2021.02.047

Ouellet-Morin, I., Cantave, C., Lupien, S., Geoffroy, MC., Brendgen, M., Vitaro, F., Tremblay, R. E., Boivin, M., & Côté, S. M. (2021). Cumulative exposure to socioeconomic and psychosocial adversity and hair cortisol concentration: A longitudinal study from 5 month to 17 years of age.  Psychoneuroendocrinology, 126, 105153. doi: 10.1016/j.psyneuen.2021.105153

Forte, A., Orri, M., Turecki, G., Galera, C., Pompili, M., Boivin, M., Tremblay, R. E., Côté, S. M., & Geoffroy MC. (2021). Identifying environmental pathways between irritability during childhood and suicidal ideation and attempt in adolescence: Findings from a 20-year population-based study. Journal of Child Psychology and Psychiatry, 1–8. doi: 10.1111/jcpp.13411

Orri, M., Pingault, J-B., Turecki, G., Nyut, A. M, Tremblay, R. E, Côté, S. M., & Geoffroy, MC. (2021). Examining the contribution of birth weight to mental health and socioeconomic outcomes: A two-sample Mendelian randomization. 1–8. British Journal of Psychiatry. doi:10.1192/bjp.2021.15

Orri, M., Boivin, M., Chen, C., Ahun, M.N., Geoffroy, MC., Ouellet-Morin, I., Tremblay, R.E., Côté S.M. (2020). Cohort profile: Quebec Longitudinal Study of Child Development (QLSCD). Social Psychiatry & Psychiatry Epidemiology. 1–12.doi: 10.1007/s00127-020-01972-z

Scardera, S., Perret, L., Ouellet-Morin, I., Gariepy, G., Juster, RP., Boivin, M., Turecki, G., Tremblay, R., Coté, S., & Geoffroy, MC. (2020). Social support and protection from depression, anxiety and suicide ideation and attempts in emerging adulthood: A longitudinal population-based study in Canada. JAMA Network Open, 3(12), e2027491. doi: 10.1001/jamanetworkopen.2020.27491

Orri, M., Russell, A., Mars, B., Turecki, G., Gunnell, D., Heron, J., Nuyt, A-M., Tremblay, R. E., Boivin, M., Côté, S. M., & Geoffroy, MC. (2020). Perinatal adversity profiles and suicide attempt in adolescence and young adulthood: Longitudinal analyses from two 20-year birth cohorts. Psychological Medicine. 1–13. doi:10.1017/S0033291720002974

Orri, M., Seguin, J., Castellanos Ryan, N, Tremblay, R. E., Côté, S. M., Gustavo Turecki, Geoffroy, MC. (2020). A genetically informed study on the association between cannabis, alcohol, and tobacco smoking with suicide attempt. Molecular Psychiatry. 1–10. doi: 10.1038/s41380-020-0785-6

Bolanis, D., Orri, M., Castellanos-Ryan, N., Renaud, J., Montreuil, T., Boivin, M., Vitaro, F., Tremblay, R., Turecki, G., Côté, S., Séguin, J. R., & Geoffroy, MC. (2020). Cannabis use, depression and suicidal ideation/attempt in adolescence: Comorbidity and direction of associations in a population-based cohort. Journal of Affective Disorders, 274, 1076–1083. doi: 10.1016/j.jad.2020.05.136

Orri, M., Scardena, S., Perret, L. C., Bolanis, D., Temcheff, C., Séguin, J. R., Boivin, M., Turecki, G., Tremblay, R., Côté, SM., & Geoffroy, MC. (2020). Mental health problems and risk of suicidal ideation and attempts in adolescents. Pediatrics, 146, e20193823. doi: 10.1542/peds.2019-3823 (To view published editorial or commentary on this research article, click HERE.)

Gifuni, A. J., Perret, L. C., Lacourse, E., Geoffroy, MC., Mbekou, V., Jollant, F., & Renaud, J. (2020). Decision‑making and cognitive control in adolescent suicidal behaviors: A qualitative systematic review of the literature. European Child & Adolescent Psychiatry. 1–17. doi: 10.1007/s00787-020-01550-3

Lesage, A., Rassy, J., Burrows, C., Renaud, J., Lambin, M., Garel, K., Medina, K., Gagné, M., Geoffroy, MC., Seguin, M., Tremblay, M., Moubarac, J-C., Ligier, F., Daniels, S., & Turecki, G. (2020). Solidaires pour la vie: Un programme scolaire canadien de littératie en santé mentale pour prévenir le suicide chez les adolescents. Perspectives Psy, 59(2), 127–139. doi: 10.1051/ppsy/202059127

Geoffroy, MC., Orri, M., Girard, A., Perret, L. C., Turecki, G. (2020). Trajectories of suicide attempts from early adolescence to emerging adulthood: prospective 11-year follow-up of a Canadian cohort. Psychological Medicine. 1–11. doi: 10.1017/S0033291720000732

Ouellet-Morin, I., Cantave, C., Paquin, S., Geoffroy, MC., Brendgen, M., Vitaro, F., Tremblay, R. E., Boivin, M., Lupien, S., & Côté, S. M. (2020). Associations between developmental trajectories of peer victimization, hair cortisol and depressive symptoms: A longitudinal study. Journal of Child Psychology and Psychiatry, 62, 19–27. doi: 10.1111/jcpp.13228

Oncioiu, S., Orri, M., Boivin, M., Geoffroy, MC., Arsenault, L., Brendgen, M., Vitaro, F., Navarro, M., Galéra, C., Tremblay, R. E, & Côté, S.M. (2020). Early childhood factors associated with peer victimization trajectories from 6 to 17 years of age. Pediatrics, 145(5), e20192654. doi : 10.1542/peds.2019-2654

Perret, L. C., Orri, M., Boivin, M., Ouellet-Morin, I., Côté, S. R., Tremblay, R. E., Renaud, J., Turecki, G., & Geoffroy, MC. (2020). Cybervictimization in adolescence and its association with subsequent suicidal ideation/attempt beyond face‐to‐face victimization: A longitudinal population‐based study. Journal of Child Psychology and Psychiatry, 61(8), 866–874. doi: doi.org/10.1111/jcpp.13158 (To view published editorial or commentary on this research article, click HERE.)

Richard-Devantoy, S., Orri, M., Bertrand, J. A., Greenway, K. T., Turecki, G., Gunnell, D., Power, C., & Geoffroy, MC. (2019). Childhood cognitive skill trajectories and suicide by mid-adulthood: An investigation of the 1958 British Birth Cohort. Psychological Medicine, 51(3), 1–8. doi : 10.1017/S0033291719003143

Orri, M., Geoffroy, MC., Turecki, G., Feng, B., Brendgen, M., Vitaro, F., Dionne, G., Paquin, S., Galera, C., Renaud, J., Tremblay, R. E., Côté, S. M., & Boivin, M. (2019). Contribution of genes and environment to the longitudinal association between childhood impulsive-aggression and suicidality in adolescence. Journal of Child Psychology and Psychiatry, 61(6), 711–720. doi: 10.1111/jcpp.13163

Viau, S. J., Denault, A. S., Dionne, G., Brendgen, M., Geoffroy, MC., Larose, S., & Boivin, M. (2019). Joint trajectories of peer cyber and traditional victimization in adolescence: A look at risk factors. Journal of Early Adolescence, 40(7), 936–965. doi: 10.1177/0272431619880339

Orri, M., Gunnell, D., Richard-Devantoy, S., Bolanis, D., Boruff, J., Turecki, G., & Geoffroy, MC. (2019). In-utero and perinatal influences on suicide risk: A systematic review and meta-analysis. The Lancet Psychiatry, 6(6), 477–492. doi: 10.1016/S2215-0366(19)30077-X

Larose, MP., Ouellet-Morin, I., Vitaro, F., Geoffroy, MC., Ahun, M., Tremblay, R. E, & Côté, S. M. (2019). Impact of a social skills program on children’s stress: A cluster-randomized trial. Psychoneuroendocrinology, 104, 115–121. doi: 0.1016/j.psyneuen.2019.02.017

Gardner, M., Lightman, S., Kuh, D., Comijs, H., Deeg, D., Gallacher, J., Geoffroy, MC., Kivimaki, M., Kumari, M., Power, C., Hardy, R., Richards, M., & Ben-Shlomo, Y. (2019). Dysregulation of the hypothalamic pituitary adrenal (HPA) axis and cognitive capability at older ages: individual participant meta-analysis of five cohorts. Scientific reports, 9(1), 4555. doi: 10.1038/s41598-019-40566-x

Orri, M., Galera, C., Turecki, G., Boivin, M., Tremblay, R. E., Geoffroy, MC., & Côté, S. M. (2019). Pathways of association between childhood irritability and adolescent suicidality. Journal of the American Academy of Child and Adolescent Psychiatry, 58, 99–107. doi: 10.1016/j.jaac.2018.06.034 (To see published editorial or commentary on this research article, click HERE.)

Côté, S. M., Ahun, M., Herba, C., Brendgen, M., Geoffroy, MC., Orri, M., Liu, X., Vitaro, F., Melchior, M., Boivin, M., & Tremblay, R. E. (2018). Why is maternal depression related to adolescent internalizing problems? A 15-year population-based study.  Journal of the American Academy of Child and Adolescent Psychiatry, 57(12), 916–924. doi: 10.1016/j.jaac.2018.04.024

Orri, M., Perret, L. C., Turecki, G., & Geoffroy, MC. (2018). Association between irritability and suicide-related outcomes across the life-course. Systematic review of both community and clinical studies. Journal of Affective Disorders, 239, 220–233. doi: 10.1016/j.jad.2018.07.010

Orri, M., Galera, C., Turecki, G., Forte, A., Renaud, J., Boivin, M., Tremblay, R. E., Côté, S. M., & Geoffroy, MC. (2018). Association of childhood irritability and depressive/ anxious mood profiles with adolescent suicidal ideation and attempts. JAMA Psychiatry, 75(5), 465–473. doi: 10.1001/jamapsychiatry.2018.0174

Geoffroy, MC., Gunnell, D., Clark, C., & Power, C. (2018). Are early life antecedents of suicide associated with an increased risk of psychiatric disorder in middle age? Acta Psychiatrica Scandinavica, 137(2), 116–124. doi: 10.1111/acps.12844

Geoffroy, MC., Boivin, M., Arsenault, L., Renaud, J., Perret, L. C., Turecki, G., Michel, G., Salla, J., Vitaro, F., Brendgen, M., Tremblay, R. E., & Côté, S. M. (2018). Childhood trajectories of peer victimization and prediction of mental health outcomes in mid-adolescence: A longitudinal population-based study. Canadian Medical Association Journal, 190(2), E37–43. doi: 10.1503/cmaj.170219 (To view published editorial or commentary on this research article, click HERE.)

Renaud, J., Lesage, A., Gagné, M., MacNeil, S., Légaré, G., Geoffroy, MC., Skinner, R., & McFaull, S. (2018). Regional variations in suicide rates among adolescents across Canada. Canadian Academy of Child and Adolescent Psychiatry, 27(2), 112–121. PMCID: PMC5896524

Ahun, M. N., Geoffroy, MC., Herba, C., Séguin, J., Boivin, M., Tremblay, R. E, & Côté, S.M. (2017). Timing and chronicity of maternal depression symptoms and children’s verbal abilities. Journal of Pediatrics, 190, 251–257. doi: 10.1016/j.jpeds.2017.07.007

Côté, S. M., Larose, M. P., Geoffroy, MC., Laurin, J., Vitaro, F., Tremblay, R. E., & Ouellet-Morin, I. (2017). Testing the impact of a social skill training versus waiting list control group for the reduction of disruptive behaviors and stress among preschool children in child care: The study protocol for a cluster randomized trial. BMC Psychology, 5, 1–9. doi: 10.1186/s40359-017-0197-9

Stafford, M., Ben-Shlomo, Y., Cooper, C., Gale, C., Gardner, M. P., Geoffroy, MC., Power, C., Kuh, D., & Cooper, R. (2017). Diurnal cortisol and mental wellbeing in middle and older age: Evidence from four cohort studies. BMJ Open, 7(10), e016085. doi: 10.1136/bmjopen-2017-016085

Côté, S. M., Orri, M., Brendgen, M., Vitaro, F., Boivin, M., Japel, C., Séguin, J. R., Geoffroy, MC., Rouquette, A., Falissard, B., & Tremblay, R. E. (2017). Psychometric properties of the mental health and social inadaptation assessment for adolescents in a population-based sample. International Journal of Methods in Psychiatry Research, 26(4), 1–10. doi: 10.1002/mpr.1566

Geoffroy, MC., & Turecki, G. (2016). The developmental course of suicidal ideation in first-episode psychosis. Lancet Psychiatry, 3(5), 395–396. doi: 10.1016/s2215-0366(15)00574-x

Geoffroy, MC., Boivin, M., Arseneault, L., Vitaro, F., Brendgen, M., Renaud, J., Séguin, J. R., Tremblay, R. E., Turecki, G., & Côté, S. M. (2016). Associations between peer victimization and suicidal ideation and suicide attempt in youth: Results from a prospective population-based birth cohort. Journal of the American Academy of Child and Adolescent Psychiatry, 55(2), 99–105. doi: 10.1016/j.jaac.2015.11.010

Geoffroy, MC., Pereira, SP., Li, L., & Power, C. (2016). Child neglect and maltreatment and childhood-to-adulthood cognition and mental health in a prospective birth cohort. Journal of the American Academy of Child and Adolescent Psychiatry, 55, 33–40. doi: 10.1016/j.jaac.2015.10.012

Pappa, I., St Pourcain, B., Benke, K., Cavadino, A., Hakulinen, C., Nivard, M. G., Nolte, I. M., Tiesler, C. M. T., Bakermans-Kranenburg, M. J., Davies, G. E., Evans, D. M., Geoffroy, M.C., Grallert, H., Groen-Blokhuis, M. M., Hudziak, J. J., Kemp, J. P., Keltikangas-Järvinen, L., McMahon, G., Mileva-Seitz, V. R., … Tiemeier, H. (2016). A genome-wide approach to children’s aggressive behavior: The EAGLE consortium. American Journal of Medical Genetics Part B: Neuropsychiatric Genetics, 171(5), 562–572. doi: 10.1002/ajmg.b.32333

Laurin, J. C., Geoffroy, MC., Boivin, M., Japel, C., Raynault, MF., Tremblay, R. E., & Côté, S.M. (2015). Child care services, socioeconomic inequalities, and academic performance. Pediatrics, 136(6), 1112–24. doi: 10.1542/peds.2015-0419

Geoffroy, MC., Li, L., & Power, C. (2014). Depressive symptoms and body mass index: Comorbidity and direction of association in a British birth cohort followed over 50 years. Psychological Medicine, 44(12), 2641–2652. doi:10.1017/S0033291714000142

Pereira, S. P., Geoffroy, MC., & Power, C. (2014). Depressive symptoms and physical activity during 3 decades in adult life: Bidirectional associations in a prospective cohort study. JAMA Psychiatry, 71(12), 1373–1380. doi:10.1001/jamapsychiatry.2014.1240

Maddock, J., Geoffroy, MC., Power, C., & Hyppönen, E. (2014). 25-Hydroxyvitamin D and cognitive performance in mid-life. British Journal of Nutrition, 111(5), 904–914. doi:10.1017/S0007114513003176

Geoffroy, MC., Gunnell, D., & Power, C. (2014). Prenatal and childhood antecedents of suicide: 50-year follow-up of the 1958 British Birth Cohort Study. Psychological Medicine, 44(6), 1245–56. doi:10.1017/S003329171300189X

Geoffroy, MC., Power, C., Touchette, E., Dubois, L., Giguère, C. E., Boivin, M., Séguin, J. R., Tremblay, R. E., & Côté, S. M. (2013). Childcare and overweight or obesity over 10 years of follow-up. The Journal of Pediatrics, 162(4), 753–758. doi: 10.1016/j.jpeds.2012.09.026

Geoffroy, MC., Herztman, C., Li, L., & Power, C. (2013). Prospective association of morning salivary cortisol with depressive symptoms in mild-life. Plos One, 8(11), e77603. doi: 10.1371/journal.pone.0077603

Maddock, J., Berry, D. J., Geoffroy, MC., Power, C., & Hyppönen, E. (2013). Vitamin D and Common mental disorders in mid-life: Cross-sectional and prospective findings. Clinical Nutrition, 32(5), 758–764. doi : j.clnu.2013.01.006

Geoffroy, MC., Séguin, J. R., Lacourse, É., Boivin, M., Tremblay, R. E., & Côté, S. M. (2012). Parental characteristics associated with childcare use during the first 4 years of life: Results from a representative cohort of Québec families. Canadian Journal of Public Health, 103, 76–80. doi: 10.1007/BF03404073

Geoffroy, MC., Hertzman, C., Li, L., & Power, C. (2012). Morning salivary cortisol and cognitive function in mid-life: Evidence from a population-based birth cohort. Psychological Medicine, 42(8), 1763–1773. doi: 10.1017/S0033291711002704

Geoffroy, MC., Côté, S. M., Giguère, C. E., Dionne, G., Zelazo, P. D., Tremblay, R. E., Boivin, M., & Séguin, J. R. (2010). Closing the gap in academic readiness and achievement: The role of early childcare. Journal of Child Psychology and Psychiatry, 51(12), 1359–1367. doi: 10.1111/j.1469-7610.2010.02316.x

Geoffroy, MC., Manningham, S., Séguin, J. R., Côté, S. M. (2009). La garderie avant 2 ans nuisible pour les enfants: Mythe ou réalité? Revue de Psychoéducation, 38, 111–115.

Côté, S., Borge, AI., Rutter, M., Geoffroy, MC., & Tremblay, R. E. (2008). Nonmaternal care in infancy and emotional behavioural difficulties at 4 years: Moderation by infant and family characteristics. Developmental Psychology, 44, 155–168. doi: 10.1037/0012-1649.44.1.155

Geoffroy, MC., Côté, S. M., Borge, A. I., Larouche, F., Séguin, J. R., & Rutter, M. (2007). Association between nonmaternal care in the first year of life and children’s receptive language skills prior to school entry: The moderating role of socioeconomic status. Journal of Child Psychology and Psychiatry, 48(5), 490–497. doi: 10.1111/j.1469-7610.2006.01704.x

Salvas, M. C., Geoffroy, MC., Boivin, M., Tremblay, R. E., & Côté, S. M. (2007). Associations entre les facteurs de risque maternel et l’agressivité physique chez les jeunes enfants. Revue Devenir, 19(4), 313–325. doi: 10.3917/dev.074.0313

Geoffroy, MC., Côté, S. M., Parent, S., & Séguin, J. R. (2006). Daycare attendance, stress and mental health. Canadian Journal of Psychiatry, 51(9), 607–615. doi: 10.1177/070674370605100909