Meta Analysis

Background: Long-term exposure to ambient air pollution has been associated with premature mortality, but associations at concentrations lower than current annual limit values are uncertain. We analysed associations between low-level air pollution and mortality within the multicentre study Effects of Low-Level Air Pollution: A Study in Europe (ELAPSE).
BACKGROUND: Many regions of the world are now facing more frequent and unprecedentedly large wildfires. However, the association between wildfire-related PM2·5 and mortality has not been well characterised. We aimed to comprehensively assess the association between short-term exposure to wildfire-related PM2·5 and mortality across various regions of the world. METHODS: For this time series study, data on daily counts of deaths for all causes, cardiovascular causes, and respiratory causes were collected from 749 cities in 43 countries and regions during 2000-16.
Background: The educational attainment of parents, particularly mothers, has been associated with lower levels of child mortality, yet there is no consensus on the magnitude of this relationship globally. We aimed to estimate the total reductions in under-5 mortality that are associated with increased maternal and paternal education, during distinct age intervals.
This study supports SDG 3 and 10 by highlighting an overrepresentation of Black children and adolescents in involuntary psychiatric hospitalisations, which may establish potentially lifelong negative mental health treatment trajectories and contribute to cycles of health inequality that persist in later life.
Background: Female genital mutilation (FGM) can leave a lasting mark on the lives and minds of those affected. Aim: To assess the consequences of FGM on women's sexual function in women who have undergone FGM compared to women who have not undergone FGM. Methods: A systematic review and meta-analysis were conducted from 3 databases; inclusion and exclusion criterions were determined. Studies included adult women having undergone FGM and presenting sexual disorders assessed by the Female Sexual Function Index (FSFI). Results: Of 129 studies, 5 that met the criteria were selected.
Background: The number of individuals with vision impairment worldwide is increasing because of an ageing population. We aimed to systematically identify studies describing the association between vision impairment and mortality, and to assess the association between vision impairment and all-cause mortality. Methods: For this systematic review and meta-analysis, we searched MEDLINE (Ovid), Embase, and Global Health database on Feb 1, 2020, for studies published in English between database inception and Feb 1, 2020.
Background: Many causes of vision impairment can be prevented or treated. With an ageing global population, the demands for eye health services are increasing. We estimated the prevalence and relative contribution of avoidable causes of blindness and vision impairment globally from 1990 to 2020. We aimed to compare the results with the World Health Assembly Global Action Plan (WHA GAP) target of a 25% global reduction from 2010 to 2019 in avoidable vision impairment, defined as cataract and undercorrected refractive error.
Background: Self-harm is a leading cause of morbidity in prisoners. Although a wide range of risk factors for self-harm in prisoners has been identified, the strength and consistency of effect sizes is uncertain. We aimed to synthesise evidence and assess the risk factors associated with self-harm inside prison.
This study supports SDG 3 and 10 by highlighting the increased prevalence of diabetes and gestational diabetes in Indigenous women compared with non-Indigenous women, across Australia, Canada, New Zealand, and the USA. These findings highlight the need for system-wide and structural interventions to reduce the risk of diabetes and gestational diabetes in Indigenous women before, during, and after pregnancy.

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