Diet, Lung Function, and Asthma Exacerbations in Puerto Rican Children

Area of Science:

• Pediatric Allergy and Immunology
• Nutritional Epidemiology
• Respiratory Medicine

Background:

• Dietary patterns are increasingly implicated in the rise of asthma in industrialized nations.
• Understanding the interplay between diet, lung function, and asthma exacerbations is crucial for public health interventions.

Purpose of the Study:

• To investigate the association between dietary patterns and lung function in Puerto Rican children.
• To examine the relationship between dietary patterns and asthma exacerbations in this population.

Main Methods:

• A case-control study involving 678 Puerto Rican children (ages 6-14) in San Juan.
• Participants completed respiratory health and food frequency questionnaires, with food items categorized into seven groups.
• A dietary score was developed, and logistic regression models assessed associations with lung function (FEV1, FVC) and asthma exacerbations, adjusting for covariates.

Main Results:

• A healthier dietary pattern was significantly associated with higher lung function (%predicted FEV1 and FVC) in control subjects.
• Dietary pattern alone did not correlate with asthma exacerbations.
• Children with an unhealthy diet and vitamin D insufficiency showed significantly higher odds of severe asthma exacerbations and hospitalizations.

Conclusions:

• A healthy diet, characterized by high intake of vegetables and grains and low intake of dairy and sweets, is linked to improved lung function in children.
• Vitamin D insufficiency in conjunction with an unhealthy diet poses a significant risk for increased asthma exacerbations and hospitalizations in children.