Prevalence of Functional Gastrointestinal Disorders in Brazilian Infants Seen in Private Pediatric Practices and Their Associated Factors.

ABSTRACT

OBJECTIVES: To assess the prevalence of the most frequent functional gastrointestinal disorders (FGIDs) in Brazilian infants seen in private pediatric clinics and their relationship with cesarean delivery, breastfeeding, and history of prematurity. METHODS: This cross-sectional study enrolled 5080 infants under 12 months old with routine visits in private pediatric clinics in Brazil. The mothers answered questions about the type of delivery, type of feeding (breast milk, infant formula, cow milk, mixed feeding), history of prematurity, and gastrointestinal symptoms. Rome IV criteria were used to diagnose FGIDs. RESULTS: The prevalence of infant regurgitation was 10.7% (487/4560); infant colic, 6.1% (131/2162); infant dyschezia, 4.0% (157/3895); functional constipation, 7.6% (341/4506); and functional diarrhea, 0.09% (2/2186). Prematurity was associated ( P < 0.05) with infant regurgitation (odds ratio [OR] = 1.41; 95% confidence interval [CI] 1.05, 1.90), infant colic (OR = 1.97; 95% CI 1.19, 3.24), infant dyschezia (OR = 1.64, 95% CI 1.02, 2.64), and functional constipation (OR = 1.44; 95% CI 1.02, 2.02). Prematurity was associated ( P < 0.001) with two or more FGIDs between 21 days and 150 days of age (OR = 3.06; 95% CI 1.74, 5.37). CONCLUSION: FGIDs are common in infants seen in the private pediatric practice in Brazil. History of prematurity was associated with infant regurgitation, infant colic, functional dyschezia, and functional constipation.