Relationship Between Adiposity and Pulmonary Function in School-Aged Canadian Children

Area of Science:

• Pediatric Pulmonology
• Childhood Obesity Research
• Public Health & Epidemiology

Background:

• Excess adiposity is linked to reduced lung function in adults.
• The relationship between childhood adiposity and lung function requires further clarification.

Purpose of the Study:

• To investigate associations between anthropometric measures, skinfold thickness, and lung function in children.
• To explore sex-specific differences in the impact of adiposity on pediatric lung function.

Main Methods:

• Analysis of data from 1,583 children (<18 years) from the Canadian Health Measures Survey (CHMS).
• Examination of correlations between body mass index (BMI), waist circumference (WC), waist-to-hip ratio, skinfold measures, and pulmonary function parameters (FVC, FEV0.75, FEV1).

Main Results:

• In normal weight boys, BMI positively correlated with lung function; however, overweight/obese boys showed inverse correlations between WC, waist-to-hip ratio, and lung function.
• Triceps skinfold was the strongest predictor of reduced lung function in boys, particularly those who were overweight or obese.
• No significant inverse associations between adiposity indicators and lung function were observed in girls, regardless of weight status.

Conclusions:

• Adiposity affects pediatric respiratory function differently based on sex and BMI category, with the most pronounced negative impact seen in overweight or obese boys.
• Triceps skinfold thickness is a key indicator of adiposity impacting lung function in boys with BMI <30 kg/m².
• Childhood adiposity does not appear to be associated with diminished lung function in girls.