Development and validation of the Early Pediatric Groningen Defecation and Fecal Continence questionnaire.

• The Early Pediatric Groningen Defecation and Fecal Continence (EP-DeFeC) questionnaire is validated to assess bowel function in children from the age of 1 month to 7 years. • If used together with its pediatric and adult equivalents, longitudinal follow-up of bowel function from infancy to adulthood becomes possible.