Definitions and Epidemiology of Constipation

Abstract

The epidemiology of constipation demonstrates a consistent pattern with several key points. No true population-based incidence or natural history studies have been published to date. The prevalence of constipation ranges from 3% to 27%, averaging approximately 15%, the variance resulting from differing case definitions of constipation and the effects of varying ascertainment methods. Constipation increases progressively with age, and this increase is particularly marked after the age of 65 years. It is twice as common in females than males and is also more common in nonwhites than whites, although the distribution by race is less consistent than the distributions by age or gender. Constipation is also more common among those with lower socioeconomic status and education levels.