Factors Responsible for Persistence of Childhood Constipation

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Abstract
Summary In this study 56% of children with chronic constipation and encopresis were unable to defecate rectal balloons. Most of them had an abnormal contraction of the external anal sphincter during defecation trials. Eighty-six percent were still unable to defecate balloons 1 year later after having complied with a conventional treatment program. Only 14% of patients unable to defecate balloons had recovered by 1 year, whereas 64% of patients able to had recovered (p - 0.02). Only 13% of patients unable to relax the external sphincter had recovered by 1 year, whereas 70% of those able to do so had recovered (p - 0.01). In addition, none of the patients with an abdominal fecal mass present during the initial examination independent of ability or inability to defecate balloons had recovered (p - 0.001). This study shows that abnormal defecation dynamics and the severity of constipation are predictors for persistence of chronic constipation and encopresis.

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