Socioeconomic status and lung function among primary school children in Canada

Area of Science:

• Pediatric pulmonology
• Environmental health
• Sociology

Background:

• Socioeconomic status (SES) is a known determinant of health outcomes.
• Lung function development in children can be influenced by various environmental and social factors.
• Previous research has explored links between SES and health, but specific impacts on pediatric lung function require further investigation.

Purpose of the Study:

• To investigate the association between socioeconomic status (SES) and lung function parameters in primary school children.
• To determine if SES is an independent risk factor for reduced lung function in boys and girls.
• To adjust for potential confounding factors including home environment and demographics.

Main Methods:

• Cross-sectional study of 989 primary school children from 18 Montreal schools (1990-1992).
• Data collection via questionnaires on health, demographics, home exposures (tobacco smoke, pets, fuel), and parental occupation for SES.
• Spirometry used to measure lung function (FEV1 and FVC).

Main Results:

• A significant positive trend was observed between higher SES categories and larger FEV1 and FVC in boys (p < 0.001).
• No significant association was found between SES and lung function in girls.
• Boys from the lowest SES group had significantly lower FEV1 (8.2%) and FVC (8.1%) compared to the most advantaged group, even after adjusting for confounders.

Conclusions:

• Socioeconomic status is an independent risk factor for diminished lung function (FEV1 and FVC) in school-aged boys.
• These findings highlight the importance of considering SES in pediatric respiratory health, separate from common indoor environmental exposures.
• Targeted interventions addressing socioeconomic disparities may be crucial for improving lung health in vulnerable male populations.