Acute mental health service use following onset of the COVID-19 pandemic in Ontario, Canada: a trend analysis.

BACKGROUND: The extent to which heightened distress during the COVID-19 pandemic translated to increases in severe mental health outcomes is unknown. We examined trends in psychiatric presentations to acute care settings in the first 12 months after onset of the pandemic. METHODS: This was a trends analysis of administrative population data in Ontario, Canada. We examined rates of hospitalizations and emergency department visits for mental health diagnoses overall and stratified by sex, age and diagnostic grouping (e.g., mood disorders, anxiety disorders, psychotic disorders), as well as visits for intentional self-injury for people aged 10 to 105 years, from January 2019 to March 2021. We used Joinpoint regression to identify significant inflection points after the onset of the pandemic in March 2020. RESULTS: Among the 12 968 100 people included in our analysis, rates of mental health-related hospitalizations and emergency department visits declined immediately after the onset of the pandemic (peak overall decline of 30% [hospitalizations] and 37% [emergency department visits] compared to April 2019) and returned to near prepandemic levels by March 2021. Compared to April 2019, visits for intentional self-injury declined by 33% and remained below prepandemic levels until March 2021. We observed the largest declines in service use among adolescents aged 14 to 17 years (55% decline in hospitalizations, 58% decline in emergency department visits) and 10 to 13 years (56% decline in self-injury), and for those with substance-related disorders (33% decline in emergency department visits) and anxiety disorders (61% decline in hospitalizations). INTERPRETATION: Contrary to expectations, the abrupt decline in acute mental health service use immediately after the onset of the pandemic and the return to near prepandemic levels that we observed suggest that changes and stressors in the first 12 months of the pandemic did not translate to increased service use. Continued surveillance of acute mental health service use is warranted.

Substance use and related harms in the context of COVID-19: a conceptual model. / Consommation de substances et méfaits connexes dans le contexte de la COVID-19 : un modèle conceptuel.

As the effects of COVID-19 have been unfolding, growing attention has been paid to the intersection of COVID-19 and substance use and the related harms. However, there are few theories and little empirical evidence to guide investigations in this area. To advance this emerging area of inquiry, we present a conceptual model that synthesizes evidence, information and knowledge on substance use and related harms in the context of the pandemic. The conceptual model offers a visual representation of the connections between the pandemic and substance use and related harms, and can be used to identify areas for future research.

As of June 2020, substance use and related harms in the context of a pandemic remained largely uninvestigated. The COVID-19 pandemic may impact how Canadians use substances and may present specific challenges and harms among people who use substances. The conceptual model in this paper offers a synthesis of evidence, information and knowledge of the concepts and associations relevant to substance use and harms in the context of the pandemic. Relevant concepts were synthesized into five interrelated domains that can be used to identify areas for future research into substance use and related harms in the context of COVID-19: substance use as a means of coping; changes in social support and networks; availability and accessibility of services; increased risk of COVID-19 transmission among people who use substances; and increased risk of severe outcomes.

En juin 2020, la consommation de substances et les méfaits connexes dans le contexte de la pandémie restaient largement inexplorés. La pandémie de COVID-19 peut avoir une incidence sur la façon dont les Canadiens consomment des substances, ce qui pourrait entraîner des défis et des méfaits particuliers chez ces personnes. Le modèle conceptuel présenté dans le présent document offre une synthèse des données probantes, de l'information et des connaissances sur les concepts et les associations relatifs à la consommation de substances et aux méfaits dans le contexte de la pandémie. Les concepts pertinents ont été synthétisés en cinq domaines interreliés qui peuvent être utilisés pour déterminer les futurs domaines de recherche sur la consommation de substances et les méfaits connexes dans le contexte de la COVID-19, soit la consommation de substances comme stratégie d'adaptation, les changements relatifs au soutien social et aux réseaux; la disponibilité et l'accessibilité des services; le risque accru de transmission de la COVID-19 chez les personnes qui consomment des substances; et le risque accru de conséquences graves.