Early Antibiotic Exposure and Risk of Childhood Obesity in Latinos

Area of Science:

• Pediatric Health
• Nutritional Science
• Epidemiology

Background:

• Early life exposures can influence long-term health outcomes.
• Antibiotic use in infancy is common but potential long-term effects require further investigation.
• Obesity is a growing public health concern, particularly in high-risk populations.

Purpose of the Study:

• To examine the association between early antibiotic exposure (before 6 months) and the risk of obesity at 2 years of age.
• To investigate the relationship in a high-risk, low-income, urban Latino cohort.
• To provide evidence for antibiotic stewardship in pediatric care.

Main Methods:

• Prospective cohort study with 97 participants.
• Data collection included maternal reports of infant dietary intake and food frequency questionnaires.
• Antibiotic use, infant weight gain, and obesity at age 2 were assessed. Cord blood leptin and insulin levels were measured at birth.
• Statistical analyses included Chi-squared tests, Student's t-tests, and multivariable logistic regression.

Main Results:

• Early antibiotic exposure before 6 months was independently associated with increased risk for rapid infant weight gain (OR 6.42, 95% CI 1.17-35.06).
• Early antibiotic exposure before 6 months was also independently associated with an increased risk for obesity at age 2 (OR 6.15, 95% CI 1.03-36.70).
• Findings highlight a significant link between early antibiotic use and later obesity risk.

Conclusions:

• Early antibiotic exposure in the first 6 months of life is a significant risk factor for rapid infant weight gain and obesity by age 2.
• These results underscore the importance of antibiotic stewardship to minimize infant exposure.
• Further research is warranted to explore the mechanisms underlying this association.