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  • Exposure to High grass...

Exposure to High grass pollens may lower lung function in children with food allergies

Written By : Dr. Shravani Dali |Medically Reviewed By : Dr. Kamal Kant Kohli Published On 2022-04-25T09:15:46+05:30  |  Updated On 25 April 2022 3:32 PM IST
Exposure to High grass pollens may lower lung function in children with food allergies
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Increasing short-term exposure to ambient grass pollen was significantly tied with reversible obstructive lung function deficits in children with allergic disease, according to a recent study published in the Journal of Allergy and Clinical Immunology: In Practice.

Grass pollen exposure is a risk factor for childhood asthma hospital attendances. However, its short-term influence on lung function especially among those with other allergic conditions has been less well-studied.

A study was conducted to investigate this association in a population-based sample of children. Within the HealthNuts cohort, 641 children performed spirometry during the grass pollen season. Grass pollen concentration was considered on the day of testing (lag 0), up to three days before (lag 1-lag 3) and cumulatively (lag 0-3). We used linear regression to assess the relevant associations and examined potential interactions with current asthma, hay fever or eczema, and food allergy.

The results of the study are:

  • Associations were observed only in children with allergic disease (p-value for interaction ≤ 0.1)
  • In children with food allergy, grass pollen concentration was associated with lower ratio of forced expiratory volume in 1 second to forced vital capacity (FEV1/FVC) and lower mid-forced expiratory flows (FEF25-75%) at all lags (e.g. at lag-2, FEV1/FVC z-score = -0.50 [95% CI: -0.80, -0.20] and FEF25-75% z-score = -0.40 [-0.60, -0.04] per 20 grains/m3 pollen increase), and increased bronchodilator responsiveness (BDR) at lag-2 and lag-3 (e.g. at lag-2, BDR = (31 [-0.005, 62] ml).
  • In children with current asthma, increasing grass pollen concentration was associated with lower FEF25-75% and increased BDR, while children with current hay fever or eczema had increased BDR only.

Thus, a proactive approach needs to be enforced to manage susceptible children, especially those with food allergies, before high grass pollen days.

Reference:

Children with food allergies are at risk of lower lung function on high pollen days by N. Sabrina Idrose, et al. published in the Journal of Allergy and Clinical Immunology: In Practice.

DOI: https://doi.org/10.1016/j.jaip.2022.03.022

Keywords:

High, grass, pollen, association, lower, lung function, children, food allergies, Journal of Allergy and Clinical Immunology: In Practice, N. Sabrina Idrose, Don Vicendese, Rachel L. Peters, Bircan Erbas, Caroline J. Lodge, Shyamali C. Dharmage, Atopy, eczema, food allergy, grass pollen, lung function, paediatrics


Journal of Allergy and Clinical Immunology: In PracticeAtopyeczemafood allergygrass pollenlung functionpaediatrics
Source : Journal of Allergy and Clinical Immunology: In Practice
Dr. Shravani Dali
Dr. Shravani Dali

    Dr. Shravani Dali has completed her BDS from Pravara institute of medical sciences, loni. Following which she extensively worked in the healthcare sector for 2+ years. She has been actively involved in writing blogs in field of health and wellness. Currently she is pursuing her Masters of public health-health administration from Tata institute of social sciences. She can be contacted at editorial@medicaldialogues.in.

    Dr. Kamal Kant Kohli
    Dr. Kamal Kant Kohli

    Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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