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Guindon GE, Abbas U, Trivedi R, Garasia S, Johnson S, John RM. Socioeconomic differences in the impact of prices and taxes on tobacco use in low- and middle-income countries-A systematic review. PLOS Glob Public Health 2023; 3:e0002342. [PMID: 37756265 PMCID: PMC10529577 DOI: 10.1371/journal.pgph.0002342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 08/07/2023] [Indexed: 09/29/2023]
Abstract
There is indisputable evidence that increases in taxes that raise tobacco prices reduce tobacco use. Consumption taxes on manufactured tobacco products, however, can be regressive in socioeconomic status (e.g., when the ratio of tax paid to income is lower for higher-income groups than for lower-income groups). Nevertheless, if the poor or less educated are more price responsive, a change in tobacco tax may be progressive in socioeconomic status. Existing reviews clearly indicate that populations with lower income or education are more responsive to tobacco tax and price changes than higher-income and more educated populations in high-income countries. Research pertaining to low- and middle-income countries was, however, limited and inconclusive. We conducted a review of quantitative studies that examined if socioeconomic status modified the association between prices and taxes and tobacco use in low- and middle-income countries. We searched two electronic databases, two search engines, and two working paper repositories. At least two reviewers independently screened articles for inclusion, extracted detailed characteristics, and assessed the risk of bias of each included study. Thirty-two studies met our inclusion criteria. Overall, we found that the evidence in low- and middle-income countries was too limited and methodologically weak to make any conclusive statements. Our review highlights a number of data and methodological limitations in existing studies. The most important limitation was the lack of formal assessment of socioeconomic differences in price responsiveness. Only seven of 32 studies assessed statistically whether own-price effects were modified by socioeconomic status. Many modelling studies have examined the distributional effect of a tax increase on tobacco use, while assuming a strong own-price elasticity gradient in income. The poor were generally assumed to be more responsive to price by a factor of two to five, relative to the wealthy. Although there are theoretical reasons to expect poorer individuals to be more responsive to monetary prices than wealthy ones in low- and middle-income countries, our review provides little empirical support.
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Affiliation(s)
- G. Emmanuel Guindon
- Centre for Health Economics and Policy Analysis, McMaster University, Hamilton, Ontario, Canada
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
- Department of Economics, McMaster University, Hamilton, Ontario, Canada
| | - Umaima Abbas
- Centre for Health Economics and Policy Analysis, McMaster University, Hamilton, Ontario, Canada
| | - Riya Trivedi
- Centre for Health Economics and Policy Analysis, McMaster University, Hamilton, Ontario, Canada
| | - Sophiya Garasia
- Centre for Health Economics and Policy Analysis, McMaster University, Hamilton, Ontario, Canada
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Sydney Johnson
- Centre for Health Economics and Policy Analysis, McMaster University, Hamilton, Ontario, Canada
| | - Rijo M. John
- Rajagiri College of Social Sciences, Rajagiri PO, Kochi, Kerala, India
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Guindon GE, Stone E, Trivedi R, Garasia S, Khoee K, Olaizola A. The Associations of Prescription Drug Insurance and Cost-Sharing With Drug Use, Health Services Use, and Health: A Systematic Review of Canadian Studies. Value Health 2023; 26:1107-1129. [PMID: 36842717 DOI: 10.1016/j.jval.2023.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 12/12/2022] [Accepted: 02/17/2023] [Indexed: 06/18/2023]
Abstract
OBJECTIVES In Canada, public insurance for physician and hospital services, without cost-sharing, is provided to all residents. Outpatient prescription drug coverage, however, is provided through a patchwork system of public and private plans, often with substantial cost-sharing, which leaves many underinsured or uninsured. METHODS We conducted a systematic review to examine the association of drug insurance and cost-sharing with drug use, health services use, and health in Canada. We searched 4 electronic databases, 2 grey literature databases, 5 specialty journals, and 2 working paper repositories. At least 2 reviewers independently screened articles for inclusion, extracted characteristics, and assessed risk of bias. RESULTS The expansion of drug insurance was associated with increases in drug use, individuals who reported drug insurance generally reported higher drug use, and increases in and higher levels of drug cost-sharing were associated with lower drug use. Although a number of studies found statistically significant associations between drug insurance or cost-sharing and health services use, the magnitudes of these associations were generally fairly small. Among 5 studies that examined the association of drug insurance and cost-sharing with health outcomes, 1 found a statistically significant and clinically meaningful association. We did not find that socioeconomic status or sex were effect modifiers; there was some evidence that health modified the association between drug insurance and cost-sharing and drug use. CONCLUSIONS Increased cost-sharing is likely to reduce drug use. Universal pharmacare without cost-sharing may reduce inequities because it would likely increase drug use among lower-income populations relative to higher-income populations.
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Affiliation(s)
- G Emmanuel Guindon
- Centre for Health Economics and Policy Analysis, McMaster University, Hamilton, Ontario, Canada.
| | - Erica Stone
- Centre for Health Economics and Policy Analysis, McMaster University, Hamilton, Ontario, Canada
| | - Riya Trivedi
- Centre for Health Economics and Policy Analysis, McMaster University, Hamilton, Ontario, Canada
| | - Sophiya Garasia
- Centre for Health Economics and Policy Analysis, McMaster University, Hamilton, Ontario, Canada
| | - Kimia Khoee
- Centre for Health Economics and Policy Analysis, McMaster University, Hamilton, Ontario, Canada
| | - Alexia Olaizola
- Department of Economics, Stanford University, Stanford, CA, USA
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Garasia S, Bishop V, Clayton S, Pinnington G, Arinze C, Jalil E. Health outcomes, health services utilization, and costs consequences of medicare uninsurance among migrants in Canada: a systematic review. BMC Health Serv Res 2023; 23:427. [PMID: 37138351 PMCID: PMC10154752 DOI: 10.1186/s12913-023-09417-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 04/18/2023] [Indexed: 05/05/2023] Open
Abstract
BACKGROUND Medically uninsured groups, many of them migrants, reportedly delay using healthcare services due to costs and often face preventable health consequences. This systematic review sought to assess quantitative evidence on health outcomes, health services use, and health care costs among uninsured migrant populations in Canada. METHODS OVID MEDLINE, Embase, Global Health, EconLit, and grey literature were searched to identify relevant literature published up until March 2021. The Cochrane Risk of Bias in Non-randomized Studies - of Interventions (ROBINS-I) tool was used to assess the quality of studies. RESULTS Ten studies were included. Data showed that there are differences among insured and uninsured groups in reported health outcomes and health services use. No quantitative studies on economic costs were captured. CONCLUSIONS Our findings indicate a need to review policies regarding accessible and affordable health care for migrants. Increasing funding to community health centers may improve service utilization and health outcomes among this population.
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Affiliation(s)
- Sophiya Garasia
- Department of Health Research Methods, Evidence, and Impact, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada.
- Centre for Health Economics and Policy Analysis, McMaster University, Hamilton, ON, Canada.
| | - Valerie Bishop
- Department of Health Research Methods, Evidence, and Impact, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada
| | - Stephanie Clayton
- Department of Health Research Methods, Evidence, and Impact, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada
| | - Genevieve Pinnington
- Department of Health Research Methods, Evidence, and Impact, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada
| | - Chika Arinze
- Department of Health Research Methods, Evidence, and Impact, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada
- Department of Oncology, McMaster University, Hamilton, ON, Canada
| | - Ezza Jalil
- Department of Health Research Methods, Evidence, and Impact, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada
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Guindon GE, Zhao K, Fatima T, Garasia S, Quinn N, Baskerville NB, Paraje G. Prices, taxes and alcohol use: a systematic umbrella review. Addiction 2022; 117:3004-3023. [PMID: 35661298 PMCID: PMC9796894 DOI: 10.1111/add.15966] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 05/09/2022] [Indexed: 01/07/2023]
Abstract
AIM To measure the impact of taxes and prices on alcohol use with particular attention to the different context of rising alcohol consumption in low- and middle-income countries. METHODS Systematic review: we searched MEDLINE, Embase, EconLit and LILACS, grey literature, hand-searched five specialty journals and examined references of relevant studies. We considered all reviews that included studies that quantitatively examined the relationship between alcohol prices or taxes and alcohol use. At least two reviewers independently screened the articles and extracted the characteristics, methods and main results and assessed the quality of each included study. We identified 30 reviews. RESULTS There was overwhelming evidence that higher alcohol prices and taxes were associated with lower total alcohol consumption and that price responsiveness varied by beverage type. Total own-price elasticities of alcohol demand were consistently negative and substantial enough to be policy meaningful; total own-price elasticities for beer, wine and spirits were found to be approximately -0.3, -0.6 and -0.65. Reviews generally concluded that higher taxes and prices were associated with lower heavy episodic drinking and heavy drinking, although the magnitude of these associations was generally unclear. Reviews provided no evidence that alcohol price responsiveness differed by socioeconomic status, mixed and contradictory evidence with respect to age and sex and limited evidence that price responsiveness in low- and middle-income countries was approximately the same as in high-income countries. CONCLUSIONS Taxes are effective in reducing alcohol use. Moreover, increasing the price of alcohol by increasing taxes can also be expected to increase tax revenue, because the demand for alcohol is most certainly inelastic.
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Affiliation(s)
- G. Emmanuel Guindon
- Centre for Health Economics and Policy AnalysisMcMaster UniversityHamiltonONCanada,Department of Health Research Methods, Evidence and ImpactMcMaster UniversityHamiltonONCanada,Department of EconomicsMcMaster UniversityHamiltonONCanada
| | - Kevin Zhao
- Centre for Health Economics and Policy AnalysisMcMaster UniversityHamiltonONCanada
| | - Tooba Fatima
- Centre for Health Economics and Policy AnalysisMcMaster UniversityHamiltonONCanada
| | - Sophiya Garasia
- Centre for Health Economics and Policy AnalysisMcMaster UniversityHamiltonONCanada,Department of Health Research Methods, Evidence and ImpactMcMaster UniversityHamiltonONCanada
| | | | | | - Guillermo Paraje
- Escuela de Negocios, Universidad Adolfo IbáñezSantiagoChile,Millennium Nucleus for the Evaluation and Analysis of Drug Policies (nDP)Santiago de ChileChile
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Cherrier N, Kearon J, Tetreault R, Garasia S, Guindon E. Community Distribution of Naloxone: A Systematic Review of Economic Evaluations. Pharmacoecon Open 2022; 6:329-342. [PMID: 34762276 PMCID: PMC8581604 DOI: 10.1007/s41669-021-00309-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 10/06/2021] [Indexed: 05/05/2023]
Abstract
BACKGROUND As a core component of harm-reduction strategies to address the opioid crisis, several countries have instituted publicly funded programs to distribute naloxone for lay administration in the community. The effectiveness in reducing mortality from opioid overdose has been demonstrated in multiple systematic reviews. However, the economic impact of community naloxone distribution programs is not fully understood. OBJECTIVES Our objective was to conduct a review of economic evaluations of community distribution of naloxone, assessing for quality and applicability to diverse contexts and settings. DATA SOURCES The search strategy was performed on MEDLINE, Embase, and EconLit databases. STUDY ELIGIBILITY CRITERIA AND INTERVENTIONS Search criteria were developed based on two themes: (1) papers involving naloxone or narcan and (2) any form of economic evaluation. A focused search of the grey literature was also conducted. Studies exploring the intervention of community distribution of naloxone were selected. STUDY APPRAISAL AND SYNTHESIS METHODS Data extraction was done using the British Medical Journal guidelines for economic submissions, assigning quality levels based on the impact of the missing or unclear components on the strength of the conclusions. RESULTS A total of nine articles matched our inclusion criteria: one cost-effectiveness analysis, eight cost-utility analyses, and one cost-benefit analysis. Overall, the quality of the studies was good (six of high quality, two of moderate quality, and one of low quality). All studies concluded that community distribution of naloxone was cost effective, with an incremental cost-utility ratio range of $US111-58,738 (year 2020 values) per quality-adjusted life-year gained. LIMITATIONS Our search strategy was developed iteratively, rather than following an a priori design. Additionally, our search was limited to English terms. CONCLUSIONS AND IMPLICATIONS OF KEY FINDINGS Based on this review, community distribution of naloxone is a worthwhile investment and should be considered by other countries dealing with the opioid epidemic.
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Affiliation(s)
- Nelda Cherrier
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
| | - Joanne Kearon
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada.
| | - Robin Tetreault
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
| | - Sophiya Garasia
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
- Centre for Health Economics and Policy Analysis, McMaster University, Hamilton, ON, Canada
| | - Emmanuel Guindon
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
- Centre for Health Economics and Policy Analysis, McMaster University, Hamilton, ON, Canada
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Guindon GE, Fatima T, Garasia S, Khoee K. A systematic umbrella review of the association of prescription drug insurance and cost-sharing with drug use, health services use, and health. BMC Health Serv Res 2022; 22:297. [PMID: 35241088 PMCID: PMC8895849 DOI: 10.1186/s12913-022-07554-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 01/27/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Increasing spending and use of prescription drugs pose an important challenge to governments that seek to expand health insurance coverage to improve population health while controlling public expenditures. Patient cost-sharing such as deductibles and coinsurance is widely used with aim to control healthcare expenditures without adversely affecting health. METHODS We conducted a systematic umbrella review with a quality assessment of included studies to examine the association of prescription drug insurance and cost-sharing with drug use, health services use, and health. We searched five electronic bibliographic databases, hand-searched eight specialty journals and two working paper repositories, and examined references of relevant reviews. At least two reviewers independently screened the articles, extracted the characteristics, methods, and main results, and assessed the quality of each included study. RESULTS We identified 38 reviews. We found consistent evidence that having drug insurance and lower cost-sharing among the insured were associated with increased drug use while the lack or loss of drug insurance and higher drug cost-sharing were associated with decreased drug use. We also found consistent evidence that the poor, the chronically ill, seniors and children were similarly responsive to changes in insurance and cost-sharing. We found that drug insurance and lower drug cost-sharing were associated with lower healthcare services utilization including emergency room visits, hospitalizations, and outpatient visits. We did not find consistent evidence of an association between drug insurance or cost-sharing and health. Lastly, we did not find any evidence that the association between drug insurance or cost-sharing and drug use, health services use or health differed by socioeconomic status, health status, age or sex. CONCLUSIONS Given that the poor or near-poor often report substantially lower drug insurance coverage, universal pharmacare would likely increase drug use among lower-income populations relative to higher-income populations. On net, it is probable that health services use could decrease with universal pharmacare among those who gain drug insurance. Such cross-price effects of extending drug coverage should be included in costing simulations.
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Affiliation(s)
- G Emmanuel Guindon
- Centre for Health Economics and Policy Analysis, McMaster University, Room 229, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada.
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON, Canada.
- Department of Economics, McMaster University, Hamilton, ON, Canada.
| | - Tooba Fatima
- Centre for Health Economics and Policy Analysis, McMaster University, Room 229, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada
| | - Sophiya Garasia
- Centre for Health Economics and Policy Analysis, McMaster University, Room 229, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON, Canada
| | - Kimia Khoee
- Centre for Health Economics and Policy Analysis, McMaster University, Room 229, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada
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Guindon GE, Fatima T, Abbat B, Bhons P, Garasia S. Area-level differences in the prices of tobacco and electronic nicotine delivery systems — A systematic review. Health Place 2020; 65:102395. [DOI: 10.1016/j.healthplace.2020.102395] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 06/30/2020] [Accepted: 07/09/2020] [Indexed: 10/23/2022]
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Mascarenhas M, Garasia S, Berthiaume P, Corrin T, Greig J, Ng V, Young I, Waddell L. A scoping review of published literature on chikungunya virus. PLoS One 2018; 13:e0207554. [PMID: 30496207 PMCID: PMC6264817 DOI: 10.1371/journal.pone.0207554] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 11/01/2018] [Indexed: 12/13/2022] Open
Abstract
Chikungunya virus (CHIKV) has caused several major epidemics globally over the last two decades and is quickly expanding into new areas. Although this mosquito-borne disease is self-limiting and is not associated with high mortality, it can lead to severe, chronic and disabling arthritis, thereby posing a heavy burden to healthcare systems. The two main vectors for CHIKV are Aedes aegypti and Aedes albopictus (Asian tiger mosquito); however, many other mosquito species have been described as competent CHIKV vectors in scientific literature. With climate change, globalization and unfettered urban planning affecting many areas, CHIKV poses a significant public health risk to many countries. A scoping review was conducted to collate and categorize all pertinent information gleaned from published scientific literature on a priori defined aspects of CHIKV and its competent vectors. After developing a sensitive and specific search algorithm for the research question, seven databases were searched and data was extracted from 1920 relevant articles. Results show that CHIKV research is reported predominantly in areas after major epidemics have occurred. There has been an upsurge in CHIKV publications since 2011, especially after first reports of CHIKV emergence in the Americas. A list of hosts and vectors that could potentially be involved in the sylvatic and urban transmission cycles of CHIKV has been compiled in this scoping review. In addition, a repository of CHIKV mutations associated with evolutionary fitness and adaptation has been created by compiling and characterizing these genetic variants as reported in scientific literature.
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Affiliation(s)
- Mariola Mascarenhas
- National Microbiology Laboratory at Guelph, Public Health Agency of Canada, Guelph, Ontario, Canada
| | - Sophiya Garasia
- National Microbiology Laboratory at Guelph, Public Health Agency of Canada, Guelph, Ontario, Canada
| | - Philippe Berthiaume
- National Microbiology Laboratory at St. Hyacinthe, Public Health Agency of Canada, St. Hyacinthe, Quebec, Canada
| | - Tricia Corrin
- National Microbiology Laboratory at Guelph, Public Health Agency of Canada, Guelph, Ontario, Canada
| | - Judy Greig
- National Microbiology Laboratory at Guelph, Public Health Agency of Canada, Guelph, Ontario, Canada
| | - Victoria Ng
- National Microbiology Laboratory at Guelph, Public Health Agency of Canada, Guelph, Ontario, Canada
| | - Ian Young
- School of Occupational and Public Health, Ryerson University, Toronto, Ontario, Canada
| | - Lisa Waddell
- National Microbiology Laboratory at Guelph, Public Health Agency of Canada, Guelph, Ontario, Canada
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Ng V, Fazil A, Gachon P, Deuymes G, Radojević M, Mascarenhas M, Garasia S, Johansson MA, Ogden NH. Assessment of the Probability of Autochthonous Transmission of Chikungunya Virus in Canada under Recent and Projected Climate Change. Environ Health Perspect 2017; 125:067001. [PMID: 28731409 PMCID: PMC5743612 DOI: 10.1289/ehp669] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 09/07/2016] [Accepted: 09/30/2016] [Indexed: 05/22/2023]
Abstract
BACKGROUND Chikungunya virus (CHIKV) is a reemerging pathogen transmitted by Aedes aegypti and Aedes albopictus mosquitoes. The ongoing Caribbean outbreak is of concern due to the potential for infected travelers to spread the virus to countries where vectors are present and the population is susceptible. Although there has been no autochthonous transmission of CHIKV in Canada, there is concern that both Ae. albopictus and CHIKV will become established, particularly under projected climate change. We developed risk maps for autochthonous CHIKV transmission in Canada under recent (1981–2010) and projected climate (2011–2040 and 2041–2070). METHODS The risk for CHIKV transmission was the combination of the climatic suitability for CHIKV transmission potential and the climatic suitability for the presence of Ae. albopictus; the former was assessed using a stochastic model to calculate R0 and the latter was assessed by deriving a suitability indicator (SIG) that captures a set of climatic conditions known to influence the ecology of Ae. albopictus. R0 and SIG were calculated for each grid cell in Canada south of 60°N, for each time period and for two emission scenarios, and combined to produce overall risk categories that were mapped to identify areas suitable for transmission and the duration of transmissibility. FINDINGS The risk for autochthonous CHIKV transmission under recent climate is very low with all of Canada classified as unsuitable or rather unsuitable for transmission. Small parts of southern coastal British Columbia become progressively suitable with short-term and long-term projected climate; the duration of potential transmission is limited to 1–2 months of the year. INTERPRETATION Although the current risk for autochthonous CHIKV transmission in Canada is very low, our study could be further supported by the routine surveillance of Ae. albopictus in areas identified as potentially suitable for transmission given our uncertainty on the current distribution of this species in Canada. https://doi.org/10.1289/EHP669
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Affiliation(s)
- Victoria Ng
- National Microbiology Laboratory , Public Health Agency of Canada , Guelph, Ontario and Saint-Hyacinthe , Québec, Canada
| | - Aamir Fazil
- National Microbiology Laboratory , Public Health Agency of Canada , Guelph, Ontario and Saint-Hyacinthe , Québec, Canada
| | - Philippe Gachon
- ESCER (Étude et Simulation du Climat à l'Échelle Régionale) centre, Université du Québec à Montréal , Montréal, Québec, Canada
| | - Guillaume Deuymes
- ESCER (Étude et Simulation du Climat à l'Échelle Régionale) centre, Université du Québec à Montréal , Montréal, Québec, Canada
| | - Milka Radojević
- Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique , Toulouse, France
| | - Mariola Mascarenhas
- National Microbiology Laboratory , Public Health Agency of Canada , Guelph, Ontario and Saint-Hyacinthe , Québec, Canada
| | - Sophiya Garasia
- Department of Population Medicine, University of Guelph , Guelph, Ontario, Canada
| | - Michael A Johansson
- Dengue Branch, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention , San Juan, Puerto Rico, USA
| | - Nicholas H Ogden
- National Microbiology Laboratory , Public Health Agency of Canada , Guelph, Ontario and Saint-Hyacinthe , Québec, Canada
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Garasia S, Samaan Z, Gerstein HC, Engert JC, Mohan V, Diaz R, Anand SS, Meyre D. Influence of depression on genetic predisposition to type 2 diabetes in a multiethnic longitudinal study. Sci Rep 2017; 7:1629. [PMID: 28487510 PMCID: PMC5431642 DOI: 10.1038/s41598-017-01406-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 03/28/2017] [Indexed: 12/26/2022] Open
Abstract
We assessed the association between depression status and prevalent and incident type 2 diabetes (T2D) as well as the interaction between depression and a genetic risk score (GS) based on 20 T2D single-nucleotide polymorphisms (SNPs) in a multi-ethnic longitudinal study. We studied 17,375 participants at risk for dysglycemia. All participants had genotypic and phenotypic data collected at baseline and 9,930 participants were followed-up for a median of 3.3 years. Normal glucose tolerance (NGT), impaired fasting glucose (IFG)/impaired glucose tolerance (IGT) and T2D statuses were determined using an oral glucose tolerance test and the 2003 American Diabetes Association criteria. Depression was diagnosed at baseline using Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM IV). Multivariate logistic regression models were adjusted for age, sex, ethnicity and body-mass index and an interaction term GS X depression was added to the model. After appropriate Bonferroni correction, no significant association between depression and T2D-related traits (IFG/IGT, T2D and dysglycemia), and no significant interaction between the GS and depression status was observed at baseline or follow-up. Our longitudinal data do not support an association between depression and abnormal glycemic status. Moreover, depression does not modify the effect of T2D predisposing gene variants.
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Affiliation(s)
- Sophiya Garasia
- Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada
| | - Zainab Samaan
- Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada.,Department of Psychiatry and Behavioral Neurosciences, McMaster University, Hamilton, ON, Canada.,Population Health Research Institute, McMaster University and Hamilton Health Sciences, Hamilton General Hospital, Hamilton, Ontario, Canada
| | - Hertzel C Gerstein
- Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada.,Population Health Research Institute, McMaster University and Hamilton Health Sciences, Hamilton General Hospital, Hamilton, Ontario, Canada.,Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - James C Engert
- Department of Medicine, McGill University, Montreal, QC, Canada.,Department of Human Genetics, McGill University, Montreal, QC, Canada.,Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | | | - Rafael Diaz
- ECLA Academic Research Organization, Rosario, Argentina
| | - Sonia S Anand
- Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada.,Population Health Research Institute, McMaster University and Hamilton Health Sciences, Hamilton General Hospital, Hamilton, Ontario, Canada.,Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - David Meyre
- Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada. .,Population Health Research Institute, McMaster University and Hamilton Health Sciences, Hamilton General Hospital, Hamilton, Ontario, Canada. .,Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada.
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