Pediatric asthma and altitude: a complex interplay between different environmental factors

Area of Science:

• Environmental Health
• Pediatric Pulmonology
• Epidemiology

Background:

• Asthma is a common non-communicable disease influenced by genetics, infections, and environmental factors.
• Environmental exposures significantly impact asthma prevalence and severity at individual and population levels.
• Understanding environmental influences, like altitude, is crucial for managing pediatric asthma.

Purpose of the Study:

• To compare pediatric asthma prevalence and characteristics in high-altitude versus low-altitude populations.
• To identify environmental factors contributing to asthma differences based on altitude.
• To review observational studies on pediatric asthma at varying altitudes.

Main Methods:

• Literature review of observational studies.
• Assessment of pediatric asthma prevalence.
• Analysis of spirometric, laboratory parameters, and aeroallergen sensitization.
• Comparison between high-altitude and low-altitude pediatric populations.

Main Results:

• Higher altitude may be associated with lower pediatric asthma prevalence and better airway inflammation profiles.
• Children at higher altitudes showed a potential increased risk of asthma hospitalization.
• Altitude correlated with specific aeroallergen sensitization: pollens at higher altitudes and house dust mites at lower altitudes, though results were heterogeneous.

Conclusions:

• Residing at higher altitudes may offer some benefits for pediatric asthma but carries a higher hospitalization risk.
• Altitude-associated allergen sensitization patterns (pollen vs. dust mites) were observed but require further investigation.
• More extensive international research is needed to clarify the complex relationship between altitude, environment, and pediatric asthma pathogenesis, especially concerning climate change.