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RESEARCH LETTER
Year : 2020  |  Volume : 37  |  Issue : 1  |  Page : 80-81  

The effects of obesity on pulmonary function in adults with asthma


Department of Paediatrics, Al-Kindy College of Medicine, University of Baghdad, Baghdad, Iraq

Date of Submission31-Aug-2019
Date of Acceptance09-Sep-2019
Date of Web Publication31-Dec-2019

Correspondence Address:
Mahmood Dhahir Al-Mendalawi
Department of Paediatrics, Al-Kindy College of Medicine, University of Baghdad, Baghdad
Iraq
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/lungindia.lungindia_406_19

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How to cite this article:
Al-Mendalawi MD. The effects of obesity on pulmonary function in adults with asthma. Lung India 2020;37:80-1

How to cite this URL:
Al-Mendalawi MD. The effects of obesity on pulmonary function in adults with asthma. Lung India [serial online] 2020 [cited 2020 Feb 19];37:80-1. Available from: http://www.lungindia.com/text.asp?2020/37/1/80/274426



Sir,

I read with interest the distinguished study by Özbey et al.[1] published in September–October 2019 issue of the Lung India. The authors studied the effects of nutritional habits and obesity on pulmonary functions and control of asthma in a cohort of Turkish patients with asthma who aged between 20 and 65 years. On employing spirometery to assess pulmonary function tests (PFTs), they found that the obese respondents had a lower mean forced vital capacity (FVC), forced expiratory volume in 1 s (FEV1), midexpiratory flow (MEF) between 25% and 75% of the maximal expiration (MEF25–75), MEF75, MEF50, MEF25, and FEV1/FVC values when compared to the respondents with normal weight (P < 0.05).[1] Apart from few study limitations mentioned by the authors, I presume that the following methodological limitation is additionally relevant. It is worthy to mention that interpreting PFT in a given population needs prediction equations for spirometery based on certain determinants such as age, gender, and height for that population.[2] Indeed, many adult populations-specific references equations for spirometric indices have been formulated to be employed in the researches and clinical fields.[3],[4] In the methodology, the authors did not mention which spirometric reference intervals were used to interpret PFT in the studied cohort. To my knowledge, spirometric standards for adult Turkish population have been already evaluated.[5] I presume that employing these national standards in the study methodology could provide more accurate idea on the influence of obesity on pulmonary functions and asthma control. Despite study limitations, the study results urge the need for weight reduction in asthmatic patients to preserve lung function and improve the quality of life.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.



 
   References Top

1.
Özbey Ü, Ucar U, Calis AG. The effects of obesity on pulmonary function in adults with asthma. Lung India 2019;36:404-10.  Back to cited text no. 1
    
2.
Rivero-Yeverino D. Spirometry: Basic concepts. Rev Alerg Mex 2019;66:76-84.  Back to cited text no. 2
    
3.
Zhang J, Hu X, Shan G. Spirometry reference values for population aged 7-80 years in china. Respirology 2017;22:1630-6.  Back to cited text no. 3
    
4.
Fawibe AE, Odeigah LO, Saka MJ. Reference equations for spirometric indices from a sample of the general adult population in Nigeria. BMC Pulm Med 2017;17:48.  Back to cited text no. 4
    
5.
Ulubay G, Dilektaşlı AG, Börekçi Ş, Yıldız Ö, Kıyan E, Gemicioǧlu B, et al. Turkish Thoracic Society Consensus report: Interpretation of spirometry. Turk Thorac J 2019;20:69-89.  Back to cited text no. 5
    




 

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