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Related Experiment Video

Updated: Jul 7, 2026

Intraperitoneal Glucose Tolerance Test, Measurement of Lung Function, and Fixation of the Lung to Study the Impact of Obesity and Impaired Metabolism on Pulmonary Outcomes
08:30

Intraperitoneal Glucose Tolerance Test, Measurement of Lung Function, and Fixation of the Lung to Study the Impact of Obesity and Impaired Metabolism on Pulmonary Outcomes

Published on: March 15, 2018

Changes in obesity status and lung function decline in a general population sample.

Francesco Pistelli1, Matteo Bottai, Laura Carrozzi

  • 1Cardio-Thoracic Department, University Hospital of Pisa, Pisa, Italy. francesco.pistelli@ifc.cnr.it

Respiratory Medicine
|February 12, 2008
PubMed
Summary

Maintaining or developing obesity significantly accelerates lung function decline over eight years. Conversely, losing weight improves lung function. This study highlights the impact of weight changes on respiratory health in adults.

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Last Updated: Jul 7, 2026

Intraperitoneal Glucose Tolerance Test, Measurement of Lung Function, and Fixation of the Lung to Study the Impact of Obesity and Impaired Metabolism on Pulmonary Outcomes
08:30

Intraperitoneal Glucose Tolerance Test, Measurement of Lung Function, and Fixation of the Lung to Study the Impact of Obesity and Impaired Metabolism on Pulmonary Outcomes

Published on: March 15, 2018

Area of Science:

  • Pulmonary Medicine
  • Epidemiology
  • Obesity Research

Background:

  • Obesity is a growing public health concern linked to various health issues.
  • The impact of changing obesity status on long-term lung function decline is not fully understood.
  • Understanding these effects is crucial for public health interventions and clinical management.

Purpose of the Study:

  • To investigate the longitudinal effects of changes in obesity status on lung function decline over an 8-year period.
  • To compare lung function changes in individuals who remained obese, became obese, became non-obese, and remained non-obese.
  • To identify the association between obesity dynamics and key respiratory parameters like FEV1, FVC, and VC.

Main Methods:

  • Analysis of data from 1212 adults (aged >24 years) from two Po River Delta epidemiological surveys (PD1: 1980-1982, PD2: 1988-1991).
  • Participants were categorized into 'never obese', 'becoming obese', 'always obese', and 'becoming non-obese' based on Body Mass Index (BMI) at PD1 and PD2.
  • Linear regression models were used to assess changes in Forced Expiratory Volume in 1 second (FEV1), Forced Vital Capacity (FVC), and Vital Capacity (VC), controlling for gender, age, and smoking habits.

Main Results:

  • Individuals in the 'becoming obese' and 'always obese' groups exhibited a significantly greater decline in lung function compared to the 'never obese' group.
  • The 'always obese' group showed a decline in vital capacities but not specifically in FEV1.
  • Conversely, the 'becoming non-obese' group experienced an improvement in lung function at PD2 compared to PD1, with mean increases of 93 mL (FEV1), 180 mL (FVC), and 48 mL (VC) compared to the 'never obese' group.

Conclusions:

  • Sustained or increased obesity over an 8-year period is associated with an accelerated decline in lung function in the general adult population.
  • Weight loss, indicated by becoming non-obese, can lead to improvements in lung function.
  • These findings underscore the importance of weight management for maintaining respiratory health and preventing lung function deterioration.