Distance to a Drying Saline Lake and Lung Function Development in a Rural Border Cohort of Children

Area of Science:

• Environmental Health
• Pediatric Respiratory Medicine
• Epidemiology

Background:

• The Salton Sea is a significant source of wind-blown dust, posing potential risks to regional air quality.
• The long-term effects of this dust exposure on children's lung development are not well understood.

Purpose of the Study:

• To investigate the association between proximity to the Salton Sea and dust exposure with lung function growth trajectories in children.
• To assess the impact of environmental degradation on pediatric respiratory health in the Imperial Valley.

Main Methods:

• A longitudinal cohort study was conducted in Imperial Valley, California, involving elementary school children.
• Lung function was assessed using spirometry (FEV1 and FVC), with exposure defined by home proximity to the Salton Sea and monitored dust event hours.
• Community-engaged research methods were employed in partnership with local organizations.

Main Results:

• Living within 11 km of the Salton Sea was associated with significantly lower forced vital capacity (FVC) growth.
• Increased hours of exposure to dust events correlated with reduced FVC and forced expiratory volume in 1 second (FEV1) growth.
• A stronger negative association between dust events and FVC growth was observed in children residing closer to the Salton Sea.

Conclusions:

• Closer residential proximity to the Salton Sea is linked to diminished lung function growth in school-aged children.
• These findings emphasize the critical need for environmental remediation efforts to safeguard children's respiratory health in the affected region.