The prevalence of asthma in Iranian adults: The first national survey and the most recent updates

Fazlollahi, Mohammad Reza; Najmi, Mehdi; Fallahnezhad, Mojtaba; Sabetkish, Nastaran; Kazemnejad, Anoshirvan; Bidad, Katayoon; Shoormasti, Raheleh Shokouhi; Mahloujirad, Maryam; Pourpak, Zahra; Moin, Mostafa

doi:10.1111/crj.12750

Cited by 40 publications

(35 citation statements)

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“…However, our study estimate was lower than that reported by a national survey in Iran, using symptoms of wheezing with dyspnea, as 9.4%; and also somewhat lower when using their definition of ‘current asthma’ which included asthma attack or use of asthma medications i.e. 4.7% [ 8 ]. Obel et al reported asthma burden to be 6.9% in a population based survey from sub-Saharan Africa using self-reported asthma-ever and and/or receiving asthma medications, which is higher than in our study [ 25 ].…”

Section: Discussioncontrasting

confidence: 88%

“…Allergy has been commonly reported risk factor across many studies and established associations have also been found for high Serum IgE level, a substitute for allergic sensitization, and for common allergens identified by skin prick tests with asthma [ 3 , 30 ]. A nationally representative survey among Iranian adults showed that prevalence of asthma was significantly higher among the older age group [ 8 ]. This finding is comparable to the INSEARCH survey from India which determined significant relationship with advancing age, highlighting a possible “cumulative effect” of age, including asthma diagnosed in past, besides late onset of the disease [ 7 ].…”

Section: Discussionmentioning

confidence: 99%

“…Globally, there is a lack of standardized data regarding prevalence of asthma due to variations in the operational definition and assessment techniques [ 6 ]. There is a lack of community based studies identifying burden of asthma through spirometry, while most of the studies rely on questionnaires [ 5 , 7 , 8 ]. The question regarding self-reported physician diagnosed asthma has been shown to have high specificity for assessing asthma in several epidemiological surveys worldwide, however, sizeable proportion of asthma may still remain undiagnosed [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

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Epidemiology of asthma and associated factors in an urban Pakistani population: adult asthma study-Karachi

et al. 2018

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BackgroundThis study was conducted in order to determine the prevalence of asthma and associated risk factors in the adult population of Karachi, Pakistan.MethodsThis multi-stage, cross-sectional survey was conducted from May 2014–August 2015; comprising 1629 adults in 75 randomly selected clusters in Karachi, Pakistan. Definitions included: ‘self-reported asthma’, ‘reversibility in FEV1’ and ‘respiratory symptoms and reversibility in FEV1’.ResultsPrevalence of asthma was 1.8% (self-reported) (95% CI: 1.0–2.6), 11.3% (reversibility in FEV1) (95% CI: 9.4–13.3) and 6.6% (symptoms and reversibility in FEV1) (95% CI: 5.1–8.1). Asthmatics were more likely to belong to the age group ≥38 years according to ‘reversibility in FEV1’ and ‘respiratory symptoms and reversibility in FEV1’ (AOR: 1.9, 95% CI: 1.2–3.3) and (AOR: 2.1, 95% CI: 1.1–4.2), respectively. Asthmatics were more likely to report history of allergies (AOR: 1.9, 95% CI: 1.2–2.9) and (AOR: 2.8, 95% CI: 1.7–4.8); and were exposed to environmental tobacco smoke (AOR: 1.6, 95% CI: 1.1–2.5) and (AOR: 1.9, 95% CI: 1.1–3.3) according to ‘reversibility in FEV1’ and ‘respiratory symptoms and reversibility in FEV1’, respectively. Asthmatics were more likely to report pack years of smoking ≥5 (AOR: 2.3, 95% CI: 1.1–4.7) according to ‘respiratory symptoms and reversibility in FEV1’.ConclusionThis study reports a high prevalence of asthma among Pakistani adults and calls for developing appropriate public health policies for prevention and control of asthma in the country. Further studies should be conducted to determine the national prevalence as well as follow-up studies to identify preventable causes for adult asthma.Electronic supplementary materialThe online version of this article (10.1186/s12890-018-0753-y) contains supplementary material, which is available to authorized users.

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Section: Discussioncontrasting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Epidemiology of asthma and associated factors in an urban Pakistani population: adult asthma study-Karachi

et al. 2018

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“…Hormonal alternations and gender‐specific differences in environmental exposures have been proposed as the possible explanations for this change just about puberty. However, such difference was not detected neither in the Iranian adult population as recently reported nor in any of the subgroups participated in this study. It seems that asthma is more prevalent in males both in the adult and paediatric populations.…”

Section: Discussioncontrasting

confidence: 73%

“…To the best of our knowledge, this is the first national survey on the prevalence of asthma and asthma symptoms in Iranian children aged 6‐7 and 13‐14 years which was performed along with our recently published study, determining the prevalence of adult asthma in Iran . A relatively large sample of 33 260 children was evaluated in two subgroups of individuals with different ages.…”

Section: Discussionmentioning

confidence: 99%

Paediatric asthma prevalence: The first national population‐based survey in Iran

Fazlollahi

Najmi

Fallahnezhad

et al. 2019

Clinical Respiratory J

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Background:The actual prevalence of paediatric asthma as a worldwide chronic disease has been surveyed in developed countries. However, no sufficient survey has been conducted in most of the eastern developing countries. Herein, we took measures to evaluate the prevalence of paediatric asthma in Iran. Methods: In this national cross-sectional study, the prevalence of asthma symptoms was estimated throughout the country using a randomized multistage stratified cluster sampling method in 16 410 and 16 850 individuals aged 6-7 and 13-14 years, respectively. A validated questionnaire including core questions of the International Study of Asthma and Allergies in Childhood (ISAAC) was applied between November 2015 and February 2016. Results: The total prevalence of asthma was 10.9% (n = 3624) (95% confidence interval [CI]: 10.6%-11.2%) which was significantly higher among 13-to 14-year olds compared to a younger age group (12.4% vs. 9.4%, P < 0.001), males versus females (12.1% vs. 9.8%, P < 0.001) and residents of urban compared to rural areas (P = 0.003). The prevalence of severe asthma was 3.9%, being significantly more prevalent in higher age groups and male individuals (P < 0.001). A significant relationship was found between asthma and passive smoking in both 6-to 7-and 13-to 14-year olds (P < 0.001). Conclusions: The prevalence of asthma and severe asthma in the paediatric population of Iran was similar to other developing countries. It is recommended to pay special attention to urban regions, male individuals and higher age groups for better controlling of asthma. Nevertheless, further national surveys are necessary to determine the trend of paediatric asthma in Iran. K E Y W O R D Sasthma, cross-sectional study, epidemiologic research design, Iran, paediatrics, prevalence | 15 FAZLOLLAHI et AL.

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The effectiveness of telegram‐based virtual education versus in‐person education on the quality of life in adolescents with moderate‐to‐severe asthma: A pilot randomized controlled trial

et al. 2020

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Asthma is a common chronic inflammatory disorder (Hockenberry, Wilson, & Wong, 2015), is one of the most prevalent health conditions around the world with an estimated 300 million currently diagnosed cases and predicted to reach 400 million by 2020 (Ohlmann, 2015), is a chronic respiratory disease among the children, is the primary reason for school absences, and is the third leading cause of hospitalization for children under the age of 15. The prevalence of asthma in Iran was 8.9% [95% confidence interval (CI): 8.5-9.3] that was similar to other Asian and European countries (Fazlollahi et al., 2018). And among Iranian children, it varied from 1.26%-11.6% (Hassanzadeh, Basiri, & Mohammad-Beigi, 2012). Despite the scientific and technological advances in

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The prevalence of asthma in Iranian adults: The first national survey and the most recent updates

Abstract: The prevalence of asthma in Iran was similar to other Asian and European countries. However, repeated national surveys are required to determine the trend of asthma prevalence in Iran in comparison to other countries.

Cited by 40 publications

References 24 publications

Epidemiology of asthma and associated factors in an urban Pakistani population: adult asthma study-Karachi

Epidemiology of asthma and associated factors in an urban Pakistani population: adult asthma study-Karachi

Paediatric asthma prevalence: The first national population‐based survey in Iran

The effectiveness of telegram‐based virtual education versus in‐person education on the quality of life in adolescents with moderate‐to‐severe asthma: A pilot randomized controlled trial

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