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Bhuia MR, Islam MA, Nwaru BI, Weir CJ, Sheikh A. Models for estimating and projecting global, regional and national prevalence and disease burden of asthma: a systematic review. J Glob Health 2020; 10:020409. [PMID: 33437461 PMCID: PMC7774028 DOI: 10.7189/jogh.10.020409] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Background Statistical models are increasingly being used to estimate and project the prevalence and burden of asthma. Given substantial variations in these estimates, there is a need to critically assess the properties of these models and assess their transparency and reproducibility. We aimed to critically appraise the strengths, limitations and reproducibility of existing models for estimating and projecting the global, regional and national prevalence and burden of asthma. Methods We undertook a systematic review, which involved searching Medline, Embase, World Health Organization Library and Information Services (WHOLIS) and Web of Science from 1980 to 2017 for modelling studies. Two reviewers independently assessed the eligibility of studies for inclusion and then assessed their strengths, limitations and reproducibility using pre-defined quality criteria. Data were descriptively and narratively synthesised. Results We identified 108 eligible studies, which employed a total of 51 models: 42 models were used to derive national level estimates, two models for regional estimates, four models for global and regional estimates and three models for global, regional and national estimates. Ten models were used to estimate the prevalence of asthma, 27 models estimated the burden of asthma – including, health care service utilisation, disability-adjusted life years, mortality and direct and indirect costs of asthma – and 14 models estimated both the prevalence and burden of asthma. Logistic and linear regression models were most widely used for national estimates. Different versions of the DisMod-MR- Bayesian meta-regression models and Cause Of Death Ensemble model (CODEm) were predominantly used for global, regional and national estimates. Most models suffered from a number of methodological limitations – in particular, poor reporting, insufficient quality and lack of reproducibility. Conclusions Whilst global, regional and national estimates of asthma prevalence and burden continue to inform health policy and investment decisions on asthma, most models used to derive these estimates lack the required reproducibility. There is a need for better-constructed models for estimating and projecting the prevalence and disease burden of asthma and a related need for better reporting of models, and making data and code available to facilitate replication.
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Affiliation(s)
- Mohammad Romel Bhuia
- Asthma UK Centre for Applied Research (AUKCAR), Usher Institute, The University of Edinburgh, Edinburgh, UK.,Department of Statistics, Shahjalal University of Science and Technology, Sylhet, Bangladesh
| | - Md Atiqul Islam
- Department of Statistics, Shahjalal University of Science and Technology, Sylhet, Bangladesh
| | - Bright I Nwaru
- Asthma UK Centre for Applied Research (AUKCAR), Usher Institute, The University of Edinburgh, Edinburgh, UK.,Krefting Research Centre, Institute of Medicine, University of Gothenburg, Sweden.,Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, Sweden
| | - Christopher J Weir
- Asthma UK Centre for Applied Research (AUKCAR), Usher Institute, The University of Edinburgh, Edinburgh, UK.,Edinburgh Clinical Trials Unit, Centre for Population Health Sciences, Usher Institute, The University of Edinburgh, Edinburgh, UK
| | - Aziz Sheikh
- Asthma UK Centre for Applied Research (AUKCAR), Usher Institute, The University of Edinburgh, Edinburgh, UK
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Use of population data for assessing trends in work-related asthma mortality. Curr Opin Allergy Clin Immunol 2020; 19:98-104. [PMID: 30601151 DOI: 10.1097/aci.0000000000000508] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
PURPOSE OF REVIEW Work-related asthma has been associated with poorer asthma control and frequent unscheduled healthcare visits, and can be fatal. Case reports of work-related asthma deaths are rare, but can initiate efforts to prevent additional cases. We reviewed relevant literature and data sources to evaluate whether analyzing mortality data at the population level can help identify potential sources of exposures that contribute to work-related asthma. RECENT FINDINGS A limited number of population-based studies have addressed work-related asthma mortality. Data on asthma mortality are derived from death certificates using the International Classification of Diseases (ICD) as a standard for coding cause. However, no discrete code for work-related asthma is available. Analysis of asthma mortality relative to industries and occupations appears to identify high-risk jobs that were not identified by analyzing asthma morbidity data. SUMMARY Beyond recognized work-related asthma deaths, it is possible that occupational exposures have contributed to other asthma deaths that have gone unnoticed and could potentially be identified by the analysis of mortality data at the population level. Such analyses in the United States appear to assist in recognizing high-risk occupations and industries. Additional analyses would be possible if a work-related asthma ICD code were available.
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Caminati M, Vianello A, Ricci G, Festi G, Bellamoli R, Longhi S, Crivellaro M, Marcer G, Monai M, Andretta M, Bovo C, Senna G. Trends and determinants of Emergency Room admissions for asthma: A retrospective evaluation in Northeast Italy. World Allergy Organ J 2019; 12:100046. [PMID: 31320967 PMCID: PMC6612754 DOI: 10.1016/j.waojou.2019.100046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 04/18/2019] [Accepted: 06/10/2019] [Indexed: 01/21/2023] Open
Abstract
Background Asthma still represents a cause of death and hospital admissions worldwide. Our study aimed at analyzing the trend of Emergency Room (ER) asthma admissions in Northeast Italy in order to investigate the relevance of specific patient-related determinants and environmental triggers (pollens, mold spores, and pollutants). Methods Retrospective data from admissions for asthma exacerbations registered between the years 2013 and 2015 in two main ERs in Northeast Italy were collected. Data about patients' age, sex and nationality were recorded. Classification of disease severity followed the current Italian ER triage scoring system (white: no need for emergency treatment; green: need for fast treatment; yellow: severe condition; red: life-threatening condition). Data on pollen/mold spore counts and pollutants were analyzed. Results Overall, 1745 ER admissions for asthma were registered, with a persistent and significant increase year by year. A slight prevalence of females and patients over 50 years old was observed. Immigrants accounted for 32%, 36% and 26% of admissions respectively in 2013, 2014 and 2015. The prevalence of immigrants' admissions was significantly higher when comparing the relative ratio of immigrant populations/Italian nationals (p < 0.05). The admissions were coded as follows: white, 6.30%; green, 35.36%; yellow, 39.37%; red, 18.97%. People aged ≥50 years were more frequently admitted with a red code, but the trend was not statistically significant (p = 0,0815). By contrast, amongst immigrants there was a higher prevalence of white and green codes observed in comparison with Italian nationals. Grass pollen peak and PM10 high levels represented environmental determinants of ER admissions increase. Conclusions The increasing rate of asthma-related ER admissions highlights the need for implementing asthma control strategies. Investigating the traits of patients referring to ER for asthma exacerbations, as well as environmental-related determinants, may help in identifying at-risk individuals and in orienting preventive strategies accordingly. Immigrants represent the most vulnerable sub-population, and their potential difficulties in accessing treatments and health services should be specifically addressed. Overall, implementing patient education in order to improve treatment adherence, as well as providing an asthma action plan to every asthmatic patient, continue to be the most urgent needs.
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Affiliation(s)
- Marco Caminati
- Asthma Center and Allergy Unit, Verona University and General Hospital, Verona, Italy.,Department of Medicine, University of Verona, Verona, Italy
| | - Andrea Vianello
- Respiratory Pathophysiology Division, University-City Hospital of Padua, Padua, Italy
| | - Giorgio Ricci
- Emergency Department, Clinical Toxicology Unit, Verona University and General Hospital, Verona, Italy
| | - Giuliana Festi
- Respiratory Unit and Asthma Center, Verona University and General Hospital, Verona, Italy
| | - Roberto Bellamoli
- Asthma Center and Allergy Unit, Verona University and General Hospital, Verona, Italy
| | - Sofia Longhi
- Asthma Center and Allergy Unit, Verona University and General Hospital, Verona, Italy
| | - Mariangiola Crivellaro
- Allergy Service, Department of Medicine and Public Health, University of Padua, Padua, Italy
| | - Guido Marcer
- Respiratory Unit and Asthma Center, Verona University and General Hospital, Verona, Italy
| | - Marco Monai
- Meteorological Service, Veneto Regional Agency for Environment Protection and Prevention, Padua, Italy
| | | | - Chiara Bovo
- Medical Direction, Verona University and General Hospital, Verona, Italy
| | - Gianenrico Senna
- Asthma Center and Allergy Unit, Verona University and General Hospital, Verona, Italy
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Gómez Sáenz JT, Gérez Callejas MJ, Hidalgo Requena A, Ginel Mendoza L, González Aguilera J, Quintano Jiménez JA. [Mortality due to asthma in Spain, 1990-2015]. Semergen 2019; 45:449-457. [PMID: 31105029 DOI: 10.1016/j.semerg.2019.02.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Revised: 02/10/2019] [Accepted: 02/14/2019] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Asthma is a major public health problem affecting more than 300 million people worldwide. The importance of a disease can be measured by its prevalence, burden of care, and its morbidity and mortality. OBJECTIVE To determine the mortality rates for asthma in Spain in the period 1990-2015. MATERIAL AND METHODS The number of deaths attributed to asthma by gender and five-year age groups, together with the population as of July 1 between the years 1990-2015 were obtained from the National Institute of Statistics. Based on these data, the gross mortality rate per 100,000 global inhabitants was calculated, by gender and age groups. RESULTS In 2015, 1,134 people (195 men and 939 women) died in Spain with a diagnosis of asthma as the main cause, with rates of 0.82 / 100,000 inhabitants compared to 2.58, respectively. The asthma mortality rates in Spain have remained stable for the last 25 years, and are slightly higher than those in the surrounding countries. While asthma mortality has declined by over 67% in males, it has increased by 32% in females. The deaths are concentrated in those over 65 years, and particularly over 80 years, where the value of death certificates is more limited. Mortality in the 5-35 years age groups is among the lowest in Europe.
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Graudenz GS, Carneiro DP, Vieira RDP. Trends in asthma mortality in the 0- to 4-year and 5- to 34-year age groups in Brazil. J Bras Pneumol 2017; 43:24-31. [PMID: 28380185 PMCID: PMC5790673 DOI: 10.1590/s1806-37562015000000253] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 11/18/2016] [Indexed: 02/04/2023] Open
Abstract
Objective: To provide an update on trends in asthma mortality in Brazil for two age groups: 0-4 years and 5-34 years. Methods: Data on mortality from asthma, as defined in the International Classification of Diseases, were obtained for the 1980-2014 period from the Mortality Database maintained by the Information Technology Department of the Brazilian Unified Health Care System. To analyze time trends in standardized asthma mortality rates, we conducted an ecological time-series study, using regression models for the 0- to 4-year and 5- to 34-year age groups. Results: There was a linear trend toward a decrease in asthma mortality in both age groups, whereas there was a third-order polynomial fit in the general population. Conclusions: Although asthma mortality showed a consistent, linear decrease in individuals ≤ 34 years of age, the rate of decline was greater in the 0- to 4-year age group. The 5- to 34-year group also showed a linear decline in mortality, and the rate of that decline increased after the year 2004, when treatment with inhaled corticosteroids became more widely available. The linear decrease in asthma mortality found in both age groups contrasts with the nonlinear trend observed in the general population of Brazil. The introduction of inhaled corticosteroid use through public policies to control asthma coincided with a significant decrease in asthma mortality rates in both subsets of individuals over 5 years of age. The causes of this decline in asthma-related mortality in younger age groups continue to constitute a matter of debate.
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Affiliation(s)
- Gustavo Silveira Graudenz
- . Departamento de Ciências Médicas, Universidade Nove de Julho, São Paulo (SP) Brasil.,. Programa de Pós-Graduação em Gerenciamento Ambiental e Sustentabilidade, Universidade Nove de Julho, São Paulo (SP) Brasil
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Gonzalez-Barcala FJ, Aboal J, Carreira JM, Rodriguez-Alvarez MX, Puga A, Sanjose E, Pintos M, Valdes L. Trends of asthma mortality in Galicia from 1993 to 2007. J Asthma 2012; 49:1016-20. [PMID: 23102239 DOI: 10.3109/02770903.2012.728272] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
INTRODUCTION In the past few years, deaths due to asthma appear to decrease at least in Western countries; but there are significant variations between populations. The aim of this study is to describe the trends in deaths due to asthma between 1993 and 2007 in our community and to analyze any factors associated with this. METHODS All cases, which had asthma as a cause of death, were included in the study. The mortality data were obtained from the official death certificate from the Deaths Register. Mortality relative risk, based on the calendar year, sociodemographic variables (age and gender), seasons, and days of the week, were estimated using a Poisson generalized linear model with a log-link. RESULTS In the 15 years of the study period, a total of 1180 people had died due to asthma, mainly in winter (34.5%), women (64.5%), and advanced age (65 years or above; 84.6%). A tendency of decreased mortality in all age groups was observed during the period of the study, which was significant in both the sexes in the 35- to 64-year-old age group, and in males above 65 years. CONCLUSION Death due to asthma is changing favorably in our community, with a tendency to decrease in the past few years. Advanced age, being female, and the winter period are associated with a higher mortality rate due to asthma.
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Affiliation(s)
- F J Gonzalez-Barcala
- Department of Respiratory Diseases, University Hospital of Santiago de Compostela, Spain.
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