Effects of Weight Loss on Airway Responsiveness in Obese Adults With Asthma
Abstract
Background The growing epidemics of obesity and asthma are major public health concerns. Although asthma-obesity links are widely studied, the effects of weight loss on asthma severity measured by airway hyperresponsiveness (AHR) have received limited attention. The main study objective was to examine whether weight reduction reduces asthma severity in obese adults with asthma.Methods In a prospective, controlled, parallel-group study, we followed 22 obese participants with asthma aged 18 to 75 years with a BMI ≥ 32.5 kg/m2 and AHR (provocative concentration of methacholine causing a 20% fall in FEV1 [PC20] < 16 mg/mL). Sixteen participants followed a behavioral weight reduction program for 3 months, and six served as control subjects. The primary outcome was change in AHR over 3 months. Changes in lung function, asthma control, and quality of life were secondary outcomes.Results At study entry, participant mean ± SD age was 44 ± 9 years, 95% were women, and mean BMI was 45.7 ± 9.2 kg/m2. After 3 months, mean weight loss was 16.5 ± 9.9 kg in the intervention group, and the control group had a mean weight gain of 0.6 ± 2.6 kg. There were significant improvements in PC20 (P = .009), FEV1 (P = .009), FVC (P = .010), asthma control (P < .001), and asthma quality of life (P = .003) in the intervention group, but these parameters remained unchanged in the control group. Physical activity levels also increased significantly in the intervention group but not in the control group.Conclusions Weight loss in obese adults with asthma can improve asthma severity, AHR, asthma control, lung function, and quality of life. These findings support the need to actively pursue healthy weight-loss measures in this population.
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A higher proportion of people with asthma seem to have overweight or obese BMI and weight loss intervention studies have been associated with improvements in asthma symptoms.
“For instance, a higher proportion of people with asthma seem to have overweight or obese BMI67 and weight loss intervention studies have been associated with improvements in asthma symptoms.68”
From A systematic review of psychological, physical health factors, and quality of life in adult asthma (2019) · cites this paper as [68]
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- Authors
- Pakhale, S., Baron, J., Dent, R., Vandemheen, K., & Aaron, S. D.
- Affiliations
- University of Ottawa (CA)
- Ottawa Hospital Research Institute (CA)
- Corresponding author
- Pakhale, Smita
- Venue
- Chest
- Publisher
- Elsevier BV
- Published
- 2015-06
- Volume
- 147
- Issue
- 6
- Pages
- 1582-1590
- ISSN
- 0012-3692 (ISSN-L)
- OpenAlex
- W2051616150
- Cited by
- 84
- References
- 31
- Citations by year
- 2026: 2 · 2025: 9 · 2024: 4 · 2023: 12 · 2022: 10 · 2021: 3 · 2020: 3 · 2019: 11 · 2018: 11 · 2017: 5 · 2016: 13 · 2015: 1
- FWCI
- 7.36
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- CHEST Journal (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Physiology › Asthma and respiratory diseases
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Chronic Obstructive Pulmonary Disease (COPD) Research
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Occupational exposure and asthma
- Keywords
- weight loss, obesity, asthma, airway hyperresponsiveness, methacholine challenge, asthma control, lung function, quality of life, physical activity
- MeSH terms
- Adult, Asthma, Bronchial Provocation Tests, Female, Forced Expiratory Volume, Humans, Male, Middle Aged, Obesity, Prospective Studies, Quality of Life, Respiratory Hypersensitivity, Severity of Illness Index, Vital Capacity, Weight Loss, Comorbidity, Body Mass Index, Methacholine Chloride, Treatment Outcome
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