Volume 55, Issue 2 pp. 503-509
ORIGINAL ARTICLE

Obesity, sedentary lifestyle, and exhaled nitric oxide in an early adolescent cohort

Bess M. Flashner MD

Corresponding Author

Bess M. Flashner MD

Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts

Correspondence Bess M. Flashner, MD, Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, 330 Brookline Ave, Boston, MA, 02215.

Email: [email protected]

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Sheryl L. Rifas-Shiman MPH

Sheryl L. Rifas-Shiman MPH

Division of Chronic Disease Research Across the Lifecourse, Department of Population Medicine, Harvard Pilgrim Health Care Institute, Boston, Massachusetts

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Emily Oken MD MPH

Emily Oken MD MPH

Division of Chronic Disease Research Across the Lifecourse, Department of Population Medicine, Harvard Pilgrim Health Care Institute, Boston, Massachusetts

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Carlos A. Camargo Jr. MD, DrPH

Carlos A. Camargo Jr. MD, DrPH

Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts

Department of Emergency Medicine, Massachusetts General Hospital, Boston, Massachusetts

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Thomas J. Platts-Mills MD

Thomas J. Platts-Mills MD

Department of Allergy and Immunology, University of Virginia Health System, Charlottesville, Virginia

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Lisa Workman BA

Lisa Workman BA

Department of Allergy and Immunology, University of Virginia Health System, Charlottesville, Virginia

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Augusto A. Litonjua MD, MPH

Augusto A. Litonjua MD, MPH

Pediatric Pulmonary Division, Department of Pediatrics, Golisano Children's Hospital at Strong, University of Rochester Medical Center, Rochester, New York

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Diane R. Gold MD, MPH

Diane R. Gold MD, MPH

Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts

Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts

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Mary B. Rice MD, MPH

Mary B. Rice MD, MPH

Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts

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First published: 05 December 2019
Citations: 15

Abstract

Fractional exhaled nitric oxide (FeNO) is a marker of airway inflammation that is well-characterized in allergic disease states. However, FeNO is also involved in nonallergic inflammatory and pulmonary vascular mechanisms or responses to environmental stimuli. We sought to determine the extent to which obesity or sedentary lifestyle is associated with FeNO in adolescents not selected on the basis of allergic disease. In Project Viva, a prebirth cohort study, we measured body mass index (BMI), skinfold thicknesses, waist circumference, body fat, hours watching television, hours of physical activity, and heart rate after exercise among 929 adolescents (median age, 12.9). We measured FeNO twice and averaged these as a continuous, log-transformed outcome. We performed linear regression models, adjusted for child age, sex, height, and race/ethnicity, maternal education and smoking during pregnancy, household income and smoking, and neighbourhood characteristics. In secondary analysis, we additionally adjusted for asthma. More than 2 hours spent watching TV was associated with 10% lower FeNO (95% confidence interval [CI]: −20, 0%). Higher body fat percentage was also associated with lower FeNO. After additional adjustment for asthma, teens who are underweight (BMI <5th %tile, 3%) had 22% lower FeNO (95%CI: −40, 2%) and teens who are overweight (BMI ≥85th %ile, 28%) had 13% lower FeNO (95%CI: −23, −2%). Each of these associations of lifestyle and body weight with lower FeNO were greater in magnitude after adjusting for asthma. In summary, sedentary lifestyle, high and low BMI were all associated with lower FeNO in this adolescent cohort.

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