Outdoor pollen concentration is not associated with exercise‐induced bronchoconstriction in children
Background Free running exercise test outdoors is an important method to diagnose asthma in children. However, the extent of how much exposure to pollens of outdoor air affects the results of the test is not known. Methods We analyzed all reliable exercise challenge tests with impulse oscillometry i...
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| Vydáno v: | Pediatric pulmonology Ročník 57; číslo 3; s. 695 - 701 |
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| Hlavní autoři: | , , , , , , |
| Médium: | Journal Article |
| Jazyk: | angličtina |
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01.03.2022
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| ISSN: | 8755-6863, 1099-0496, 1099-0496 |
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| Abstract | Background
Free running exercise test outdoors is an important method to diagnose asthma in children. However, the extent of how much exposure to pollens of outdoor air affects the results of the test is not known.
Methods
We analyzed all reliable exercise challenge tests with impulse oscillometry in children (n = 799) between January 2012 and December 2014 in Tampere University Hospital. Pollen concentrations at the time of the test were collected from the register of Biodiversity Unit of the University of Turku. We compared the frequency of exercise‐induced bronchoconstriction and pollen concentrations.
Results
The analyses were restricted to birch and alder pollen as high counts of grass and mugwort pollen were so infrequent. The relative change in resistance at 5 Hz after exercise or the frequency of exercise‐induced bronchoconstriction were not related to alder or birch pollen concentrations over 10 grains/m3 (p = 0.125–0.398). In logistic regression analysis comparing the effects of alder or birch pollen concentrations, immunoglobulin E (IgE)‐mediated alder or birch allergy and absolute humidity over 10 g/m3 only absolute humidity was independently associated with change in airway resistance (odds ratio [OR]: 0.32, confidence interval [CI]: 0.13–0.67, p: 0.006).
Conclusions
In our large clinical sample, outdoor air pollen concentration was not associated with the probability of exercise‐induced bronchoconstriction in free running test in children while low absolute humidity was the best predictor of airway obstruction. |
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| AbstractList | Free running exercise test outdoors is an important method to diagnose asthma in children. However, the extent of how much exposure to pollens of outdoor air affects the results of the test is not known.
We analyzed all reliable exercise challenge tests with impulse oscillometry in children (n = 799) between January 2012 and December 2014 in Tampere University Hospital. Pollen concentrations at the time of the test were collected from the register of Biodiversity Unit of the University of Turku. We compared the frequency of exercise-induced bronchoconstriction and pollen concentrations.
The analyses were restricted to birch and alder pollen as high counts of grass and mugwort pollen were so infrequent. The relative change in resistance at 5 Hz after exercise or the frequency of exercise-induced bronchoconstriction were not related to alder or birch pollen concentrations over 10 grains/m
(p = 0.125-0.398). In logistic regression analysis comparing the effects of alder or birch pollen concentrations, immunoglobulin E (IgE)-mediated alder or birch allergy and absolute humidity over 10 g/m
only absolute humidity was independently associated with change in airway resistance (odds ratio [OR]: 0.32, confidence interval [CI]: 0.13-0.67, p: 0.006).
In our large clinical sample, outdoor air pollen concentration was not associated with the probability of exercise-induced bronchoconstriction in free running test in children while low absolute humidity was the best predictor of airway obstruction. Free running exercise test outdoors is an important method to diagnose asthma in children. However, the extent of how much exposure to pollens of outdoor air affects the results of the test is not known.BACKGROUNDFree running exercise test outdoors is an important method to diagnose asthma in children. However, the extent of how much exposure to pollens of outdoor air affects the results of the test is not known.We analyzed all reliable exercise challenge tests with impulse oscillometry in children (n = 799) between January 2012 and December 2014 in Tampere University Hospital. Pollen concentrations at the time of the test were collected from the register of Biodiversity Unit of the University of Turku. We compared the frequency of exercise-induced bronchoconstriction and pollen concentrations.METHODSWe analyzed all reliable exercise challenge tests with impulse oscillometry in children (n = 799) between January 2012 and December 2014 in Tampere University Hospital. Pollen concentrations at the time of the test were collected from the register of Biodiversity Unit of the University of Turku. We compared the frequency of exercise-induced bronchoconstriction and pollen concentrations.The analyses were restricted to birch and alder pollen as high counts of grass and mugwort pollen were so infrequent. The relative change in resistance at 5 Hz after exercise or the frequency of exercise-induced bronchoconstriction were not related to alder or birch pollen concentrations over 10 grains/m3 (p = 0.125-0.398). In logistic regression analysis comparing the effects of alder or birch pollen concentrations, immunoglobulin E (IgE)-mediated alder or birch allergy and absolute humidity over 10 g/m3 only absolute humidity was independently associated with change in airway resistance (odds ratio [OR]: 0.32, confidence interval [CI]: 0.13-0.67, p: 0.006).RESULTSThe analyses were restricted to birch and alder pollen as high counts of grass and mugwort pollen were so infrequent. The relative change in resistance at 5 Hz after exercise or the frequency of exercise-induced bronchoconstriction were not related to alder or birch pollen concentrations over 10 grains/m3 (p = 0.125-0.398). In logistic regression analysis comparing the effects of alder or birch pollen concentrations, immunoglobulin E (IgE)-mediated alder or birch allergy and absolute humidity over 10 g/m3 only absolute humidity was independently associated with change in airway resistance (odds ratio [OR]: 0.32, confidence interval [CI]: 0.13-0.67, p: 0.006).In our large clinical sample, outdoor air pollen concentration was not associated with the probability of exercise-induced bronchoconstriction in free running test in children while low absolute humidity was the best predictor of airway obstruction.CONCLUSIONSIn our large clinical sample, outdoor air pollen concentration was not associated with the probability of exercise-induced bronchoconstriction in free running test in children while low absolute humidity was the best predictor of airway obstruction. Background Free running exercise test outdoors is an important method to diagnose asthma in children. However, the extent of how much exposure to pollens of outdoor air affects the results of the test is not known. Methods We analyzed all reliable exercise challenge tests with impulse oscillometry in children (n = 799) between January 2012 and December 2014 in Tampere University Hospital. Pollen concentrations at the time of the test were collected from the register of Biodiversity Unit of the University of Turku. We compared the frequency of exercise‐induced bronchoconstriction and pollen concentrations. Results The analyses were restricted to birch and alder pollen as high counts of grass and mugwort pollen were so infrequent. The relative change in resistance at 5 Hz after exercise or the frequency of exercise‐induced bronchoconstriction were not related to alder or birch pollen concentrations over 10 grains/m3 (p = 0.125–0.398). In logistic regression analysis comparing the effects of alder or birch pollen concentrations, immunoglobulin E (IgE)‐mediated alder or birch allergy and absolute humidity over 10 g/m3 only absolute humidity was independently associated with change in airway resistance (odds ratio [OR]: 0.32, confidence interval [CI]: 0.13–0.67, p: 0.006). Conclusions In our large clinical sample, outdoor air pollen concentration was not associated with the probability of exercise‐induced bronchoconstriction in free running test in children while low absolute humidity was the best predictor of airway obstruction. BackgroundFree running exercise test outdoors is an important method to diagnose asthma in children. However, the extent of how much exposure to pollens of outdoor air affects the results of the test is not known.MethodsWe analyzed all reliable exercise challenge tests with impulse oscillometry in children (n = 799) between January 2012 and December 2014 in Tampere University Hospital. Pollen concentrations at the time of the test were collected from the register of Biodiversity Unit of the University of Turku. We compared the frequency of exercise‐induced bronchoconstriction and pollen concentrations.ResultsThe analyses were restricted to birch and alder pollen as high counts of grass and mugwort pollen were so infrequent. The relative change in resistance at 5 Hz after exercise or the frequency of exercise‐induced bronchoconstriction were not related to alder or birch pollen concentrations over 10 grains/m3 (p = 0.125–0.398). In logistic regression analysis comparing the effects of alder or birch pollen concentrations, immunoglobulin E (IgE)‐mediated alder or birch allergy and absolute humidity over 10 g/m3 only absolute humidity was independently associated with change in airway resistance (odds ratio [OR]: 0.32, confidence interval [CI]: 0.13–0.67, p: 0.006).ConclusionsIn our large clinical sample, outdoor air pollen concentration was not associated with the probability of exercise‐induced bronchoconstriction in free running test in children while low absolute humidity was the best predictor of airway obstruction. |
| Author | Kivistö, Juho E. Tikkakoski, Anna P. Tikkakoski, Antti Lehtimäki, Lauri Karjalainen, Jussi Sipilä, Kalle Kähönen, Mika |
| Author_xml | – sequence: 1 givenname: Anna P. surname: Tikkakoski fullname: Tikkakoski, Anna P. email: pauliina.tikkakoski@tuni.fi organization: Tampere University – sequence: 2 givenname: Jussi surname: Karjalainen fullname: Karjalainen, Jussi organization: Tampere University Hospital – sequence: 3 givenname: Kalle surname: Sipilä fullname: Sipilä, Kalle organization: Tampere University Hospital – sequence: 4 givenname: Juho E. surname: Kivistö fullname: Kivistö, Juho E. organization: Tampere University Hospital – sequence: 5 givenname: Mika surname: Kähönen fullname: Kähönen, Mika organization: Tampere University Hospital – sequence: 6 givenname: Lauri surname: Lehtimäki fullname: Lehtimäki, Lauri organization: Tampere University Hospital – sequence: 7 givenname: Antti surname: Tikkakoski fullname: Tikkakoski, Antti organization: Tampere University Hospital |
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Free running exercise test outdoors is an important method to diagnose asthma in children. However, the extent of how much exposure to pollens of... Free running exercise test outdoors is an important method to diagnose asthma in children. However, the extent of how much exposure to pollens of outdoor air... BackgroundFree running exercise test outdoors is an important method to diagnose asthma in children. However, the extent of how much exposure to pollens of... |
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| SubjectTerms | Airway management Allergens Asthma Asthma - diagnosis Asthma - etiology Bronchoconstriction Child exercise test exercise‐induced asthma Humans Humidity Hypersensitivity Immunoglobulin E Pollen pulmonary function tests |
| Title | Outdoor pollen concentration is not associated with exercise‐induced bronchoconstriction in children |
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