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BACKGROUND: Studies across the globe generally reported increased mortality risks associated with particulate matter with aerodynamic diameter ≤2.5 μm (PM2.5) exposure with large heterogeneity in the magnitude of reported associations and the shape of concentration-response functions (CRFs). We aimed to evaluate the impact of key study design factors (including confounders, applied exposure model, population age, and outcome definition) on PM2.5 effect estimates by harmonizing analyses on three previously published large studies in Canada [Mortality-Air Pollution Associations in Low Exposure Environments (MAPLE), 1991-2016], the United States (Medicare, 2000-2016), and Europe [Effects of Low-Level Air Pollution: A Study in Europe (ELAPSE), 2000-2016] as much as possible. METHODS: We harmonized the study populations to individuals 65+ years of age, applied the same satellite-derived PM2.5 exposure estimates, and selected the same sets of potential confounders and the same outcome. We evaluated whether differences in previously published effect estimates across cohorts were reduced after harmonization among these factors. Additional analyses were conducted to assess the influence of key design features on estimated risks, including adjusted covariates and exposure assessment method. A combined CRF was assessed with meta-analysis based on the extended shape-constrained health impact function (eSCHIF). RESULTS: More than 81 million participants were included, contributing 692 million person-years of follow-up. Hazard ratios and 95% confidence intervals (CIs) for all-cause mortality associated with a 5-μg/m³ increase in PM2.5 were 1.039 (1.032, 1.046) in MAPLE, 1.025 (1.021, 1.029) in Medicare, and 1.041 (1.014, 1.069) in ELAPSE. Applying a harmonized analytical approach marginally reduced difference in the observed associations across the three studies. Magnitude of the association was affected by the adjusted covariates, exposure assessment methodology, age of the population, and marginally by outcome definition. Shape of the CRFs differed across cohorts but generally showed associations down to the lowest observed PM2.5 levels. A common CRF suggested a monotonically increased risk down to the lowest exposure level. [ABSTRACT FROM AUTHOR]

Background: Accessing healthcare for immigrants in Canada is complicated by many difficulties. With the continued and upward trend of immigration to Canada, it is crucial to identify the solutions to the barriers from the perspectives of different immigrant communities as they encounter them including the relatively smaller and less studied population groups of immigrants. As such, Nepalese immigrants in Canada are a South Asian ethnic group who have their own distinct language, culture, and socio-economic backgrounds, however, their experience with accessing healthcare in Canada is scarce in the literature. Methods: We conducted 12 focus group discussions with first-generation Nepalese immigrants who had experiences with primary care use in Canada. Informed consent and demographic information were obtained before each focus group discussion. The verbatim transcription of the focus groups was analyzed using thematic analysis. Results: The participants expressed a range of potential solutions to overcome the barriers, which we presented using the socio-ecological framework into 4 different levels. This includes individual-, community-, service provider-, and government/policy-levels. Individual-level actions included improving self-awareness and knowledge of health in general and navigating the healthcare system and proactively improving the language skills and assimilating into the Canadian culture. Examples of community-level actions included community events to share health information with immigrants, health literacy programs, and driving/carpooling to clinics or hospitals. Actions at the service provider level were mainly focused on enhancing communications, cultural competency training for providers, and ensuring to hire primary care workforce representing various ethnocultural backgrounds. Overall, focus group participants believed that the provincial and federal government, as appropriate, should increase support for dental and vision care support and take actions to increase the healthcare capacity, particularly by employing internationally graduated health professionals. Conclusions: Access to primary care is essential for the health of immigrant populations in Canada. Individuals, community organizations, health service providers, and governments need to work both individually and collaboratively to improve immigrants' primary care access. [ABSTRACT FROM AUTHOR]

Objective: We reviewed the literature on the association between pre-pregnancy multimorbidity (co-occurrence of two or more chronic conditions) and adverse maternal outcomes in pregnancy and postpartum. Data sources: Medline, EMBASE, and CINAHL were searched from inception to September, 2021. Study selection: Observational studies were eligible if they reported on the association between ≥ 2 co-occurring chronic conditions diagnosed before conception and any adverse maternal outcome in pregnancy or within 365 days of childbirth, had a comparison group, were peer-reviewed, and were written in English. Data extraction and synthesis: Two reviewers used standardized instruments to extract data and rate study quality and the certainty of evidence. A narrative synthesis was performed. Results: Of 6,381 studies retrieved, seven met our criteria. There were two prospective cohort studies, two retrospective cohort studies, and 3 cross-sectional studies, conducted in the United States (n=6) and Canada (n=1), and ranging in size from n=3,110 to n=57,326,681. Studies showed a dose-response relation between the number of co-occurring chronic conditions and risk of adverse maternal outcomes, including severe maternal morbidity or mortality, hypertensive disorders of pregnancy, and acute health care use in the perinatal period. Study quality was rated as strong (n=1), moderate (n=4), or weak (n=2), and the certainty of evidence was very low to moderate. Conclusion: Given the increasing prevalence of chronic disease risk factors such as advanced maternal age and obesity, more research is needed to understand the impact of pre-pregnancy multimorbidity on maternal health so that appropriate preconception and perinatal supports can be developed. [ABSTRACT FROM AUTHOR]

Canada is not immune to the dramatic economic changes that are transforming society in other industrialized countries, where once-thriving factory and resource towns are dying, while educated knowledge workers in more cosmopolitan centres prosper. Where this growing inequality between communities and social classes takes root, worrisome social and political developments can develop, such as the polarization occurring in the U.S. and parts of Europe. Canada's 10 largest cities have been the primary driver of economic growth in recent years, and Canada is unusual in the degree to which its population is concentrated in a relatively small number of cities. To date, Canada's largest cities have been doing well and Canada has not so far seen the contrast so evident in the United States between highly successful cities and large cities in decline, such as Detroit and Cleveland. However, a ranking of national cities using "vitality" scores highlights a growing inequality between Canada's largest cities and its midsize and smaller cities. In many communities in the Atlantic region, in Quebec beyond its two major cities, and in the northern regions of B.C. and Ontario, harder times may lie ahead. Their populations are stagnating, their employment rates for people of prime working age are distressingly low, and their proportion of lowincome families is high. Urban decline can lead to further poverty, significant population aging and more pressure on higher levels of government to provide services that these communities can no longer afford. The strength of cities primarily revolves today around human capital and the ability of a community to develop or attract a highly skilled labour force. If Canada is to avoid a future where just a few cities are economic and demographic "winners" and the rest are "losers," policy-makers will need to consider how to help keep midsized cities from being increasingly left behind, whether that be through diversifying immigration patterns, targeted investment outside large urban areas, or other approaches. The pandemic, which has led some employers to rethink the need to keep workers in expensive big-city downtown offices, could create new opportunities to reinvigorate smaller, lower-cost centres. However, without a change in the pattern of divergence between Canada's dynamic cities and the rest, the societal and political strife that has unfolded elsewhere could someday happen here. [ABSTRACT FROM AUTHOR]