RESUMEN
OBJECTIVES: To evaluate the clinical validity and applicability of the Paris Consensus on Childhood Constipation Terminology (PACCT) versus the Rome II criteria for pediatric functional defecation disorders (FDDs). STUDY DESIGN: Children from infancy to 17 years who had been referred to a tertiary center for chronic constipation were recruited for the study. A prospective longitudinal design was used. The Questionnaire on Pediatric Gastrointestinal Symptoms (QPGS) for parents of children age 0 to 4 and 4 to 17 years and for children age 10 to 17 years was used for diagnosis of FDDs. RESULTS: Children (n = 128; mean age, 67.2 months; 62 males) were screened consecutively. FDDs were diagnosed significantly more often by PACCT than by the Rome II criteria (112 [88.9%] vs 60 [47.6%]; P = .001). The agreement Cohen's kappa test showed kappa = .173. A statistically significant difference was reported between Rome II and PACCT in the 4- to 17-year-old group (P = .001). Scybalous, pebble-like stools and defecation with straining were the main symptoms reported (80%), followed by painful defecation (66%). CONCLUSIONS: The PACCT criteria show greater applicability than the Rome II criteria for FDDs. The poor agreement implies that they do not identify the same types of patients. Because such a high percentage of constipated children reported the symptoms of defecation with straining, scybalous pebble-like stools, and painful defecation, including these symptoms in any revised criteria should be taken into consideration.