Evidence map›Paper›PMID 34569772›Full record

ArticleHealth promotion and chronic disease prevention in Canada : research, policy and practice2021

Symptoms of major depressive disorder during the COVID-19 pandemic: results from a representative sample of the Canadian population.

Margot Shields, Lil Tonmyr, Andrea Gonzalez, Murray Weeks, Su-Bin Park, Anne-Marie Robert, Dawn-Li Blair, Harriet L MacMillan

Abstract read
In one paragraph

Article in Health promotion and chronic disease prevention in Canada : research, policy and practice, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

31 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  5. Sex-specific estimates of positive mental health among youth before and during the COVID-19 pandemic in Canada.Health promotion and chronic disease prevention in Canada : research, policy and practice · 2025
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  19. Social isolation, loneliness and positive mental health among older adults in Canada during the COVID-19 pandemic.Health promotion and chronic disease prevention in Canada : research, policy and practice · 2023
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  20. Pandemic-related impacts and suicidal ideation among adults in Canada: a population-based cross-sectional study.Health promotion and chronic disease prevention in Canada : research, policy and practice · 2023
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Margot ShieldsPublic Health Agency of Canada, Ottawa, Ontario, Canada.
Lil TonmyrPublic Health Agency of Canada, Ottawa, Ontario, Canada.
Andrea GonzalezDepartment of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton, Ontario, Canada.
Murray WeeksPublic Health Agency of Canada, Ottawa, Ontario, Canada.
Su-Bin ParkPublic Health Agency of Canada, Ottawa, Ontario, Canada.
Anne-Marie RobertPublic Health Agency of Canada, Ottawa, Ontario, Canada.
Dawn-Li BlairPublic Health Agency of Canada, Ottawa, Ontario, Canada.
Harriet L MacMillanDepartment of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton, Ontario, Canada.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionSince the outbreak of COVID-19, numerous studies from around the world have reported declines in mental health. However, most of these studies were of low-to-moderate quality and many were based on convenience samples or used mental health measures with low validity, or both. Consequently, it has been difficult to draw conclusions.

methodsBoth the 2020 Survey on COVID-19 and Mental Health (SCMH) and the Canadian Community Health Survey (CCHS) (2015-2019) used the Patient Health Questionnaire-9 to screen for major depressive disorder (MDD) in adults aged 18 or older. The prevalence of MDD was compared between the SCMH and the CCHS. Risk and protective factors for MDD in the SCMH were examined using bivariate and logistic regression analyses.

resultsBased on SCMH data, 15.2% (95% CI: 14.2-16.2) of Canadians screened positive for MDD. The prevalence of MDD was more than two times higher in the SCMH (during COVID-19) than in the CCHS (predating COVID-19). In bivariate analysis, Canadians reporting five or more COVID-19-related risk factors were close to 30 times more likely to have MDD than those reporting no risk factors. Mastery and a sense of community belonging were protective factors for MDD.

conclusionAfter remaining stable for two decades, the prevalence of depression among Canadians increased substantially with the onset of COVID-19. Ongoing monitoring of this common condition associated with major morbidity is vital to determine if elevated levels of MDD persist as we progress through and beyond future waves of COVID-19.

Indexed as

COVID-19Major Depressive DisorderAdultCanadaHumansPandemicsPrevalenceSARS-CoV-2copingcoronavirusCOVID-19depressionfamily violencemasterymental healthsense of community belonging

Identifiers

PMID34569772
PMCPMC8639172

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.