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Associations of fruit intake and lung function in middle-age are modified by obesity

Stephanie Byrne, John Burgess, Lisa Wood, Michael Abramson, Bircan Erbas, Jennifer Perret, Stephen Morrison, David Johns, Caroline Lodge, Adrian Lowe, E. Haydn Walters, Shyamali Dharmage, Melanie Matheson
European Respiratory Journal 2015 46: PA5078; DOI: 10.1183/13993003.congress-2015.PA5078
Stephanie Byrne
1Allergy and Lung Health Unit, Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria Australia
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John Burgess
1Allergy and Lung Health Unit, Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria Australia
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Lisa Wood
2School of Biomedical Science and Pharmacy, University of Newcastle, Newcastle, New South Wales Australia
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Michael Abramson
3School of Public Health & Preventive Medicine, Monash University, Melbourne, Victoria Australia
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Bircan Erbas
1Allergy and Lung Health Unit, Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria Australia
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Jennifer Perret
1Allergy and Lung Health Unit, Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria Australia
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Stephen Morrison
4Department of Thoracic Medicine, Royal Brisbane and Women's Hospital, Brisbane, Queensland Australia
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David Johns
5School of Medicine, University of Tasmania, Hobart, Tasmania Australia
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Caroline Lodge
1Allergy and Lung Health Unit, Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria Australia
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Adrian Lowe
1Allergy and Lung Health Unit, Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria Australia
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E. Haydn Walters
1Allergy and Lung Health Unit, Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria Australia
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Shyamali Dharmage
1Allergy and Lung Health Unit, Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria Australia
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Melanie Matheson
1Allergy and Lung Health Unit, Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria Australia
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Abstract

Background: Results from studies of fruit intake and lung function are inconsistent.

Aim: To investigate associations between fruit intake, lung function and bronchial responsiveness in middle-age.

Methods: A subsample (n=836) of the 1961-born Tasmanian Longitudinal Health Study (TAHS) cohort was assessed by questionnaire, pre-bronchodilator (pre-BD) spirometry and methacholine challenge. Participants reported serves of fruit and vegetables consumed daily (none to ≥ 4). Regression was used to model respiratory outcomes adjusting for gender, smoking, education, occupation and asthma. Obesity measures (body mass index (BMI), waist circumference (WC) and waist-to-hip ratio (WHR)) were examined as effect modifiers.

Results: Associations between fruit intake and pre-BD FEV1, FEV1/FVC and methacholine dose response slope (mDRS) were modified by BMI (pinteraction = 0.01, 0.004 and 0.01 respectively) and WC (pinteraction=0.08, 0.07 and 0.02 respectively) but not WHR.

Fruit intake was associated with better lung function for those with a healthy weight and worse lung function in overweight or obese participants. Worse lung function was observed for those with BMIs > 30, 26 and 25 for pre-BD FEV1, FEV1/FVC and mDRS respectively. Worse lung function was also seen with WC > 102cm, 90cm and 88cm for pre-BD FEV1, FEV1/FVC and mDRS respectively.

Conclusion: The association between fruit intake and lung function was modified by obesity. Fruit intake was associated with higher lung function in healthy weight persons and lower lung function in those overweight or obese.

Grant Support: NHMRC, Clifford Craig Medical Research Trust.

  • Epidemiology
  • Public health
  • Lung function testing
  • Copyright ©ERS 2015
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Associations of fruit intake and lung function in middle-age are modified by obesity
Stephanie Byrne, John Burgess, Lisa Wood, Michael Abramson, Bircan Erbas, Jennifer Perret, Stephen Morrison, David Johns, Caroline Lodge, Adrian Lowe, E. Haydn Walters, Shyamali Dharmage, Melanie Matheson
European Respiratory Journal Sep 2015, 46 (suppl 59) PA5078; DOI: 10.1183/13993003.congress-2015.PA5078

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Associations of fruit intake and lung function in middle-age are modified by obesity
Stephanie Byrne, John Burgess, Lisa Wood, Michael Abramson, Bircan Erbas, Jennifer Perret, Stephen Morrison, David Johns, Caroline Lodge, Adrian Lowe, E. Haydn Walters, Shyamali Dharmage, Melanie Matheson
European Respiratory Journal Sep 2015, 46 (suppl 59) PA5078; DOI: 10.1183/13993003.congress-2015.PA5078
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