Constipation: Prevalence and Associated Factors in Adults Living in Londrina, Southern Brazil.

The aims of this study were to estimate the prevalence of constipation and identify associated factors among adults living in an urban area in Londrina, Brazil. This was a secondary analysis of an epidemiological, population-based study on bowel habit performed in 2008 with 2,162 individuals selected through cluster sampling. Interviews were administered using a sociodemographic questionnaire and the adapted and validated Brazilian version of the "Bowel Function in the Community" tool. Variables from the original database were used to determine the prevalence of constipation (according to the Rome Criteria III) and associated factors. The chi-square test and multivariate logistic regression were used for data analysis. The overall prevalence of constipation (14.6%; n = 315) was higher among women than among men (21.9% vs. 5.3%), increased with age among men, and was inversely related to family income. Overall, female gender, low socioeconomic status, history of anal fissure, anorectal surgery, stroke, nervous system disease, fistulae, and hemorrhoids were factors significantly associated with constipation. The variables low social economic status, stroke, anal fissure history, and anorectal surgery were statistically significant in all three tested statistical models.

Cross-cultural adaptation and validation of the Portuguese version of the Bowel Function in the Community instrument.

PURPOSE: We sought to translate the Bowel Function in the Community instrument into the Portuguese language and to culturally adapt it to Brazilian society. We also aimed to test the validity and reliability (content validity, and interrater and test-retest reliability) of this adapted version. INSTRUMENT: The original instrument comprised 70 items grouped into 6 principal areas: general bowel habits, fecal incontinence, lower urinary tract symptoms, anorectal diseases and surgical history, medical care utilization, and potential contributing medical disorders. METHODS: The instrument was translated into Portuguese, and assessed by a committee of specialists. Content validity of the translated version was verified by testing and via feedback from a focus group. The adapted version incorporated both semantic and idiomatic alterations. The instrument then underwent testing for interrater and test-retest reliability. RESULTS: Interrater reliability testing revealed a 94% level of agreement between interviewers and researchers. Test-retest reliability testing revealed a slightly higher than 60% level of agreement when the same subjects completed the instrument twice, during a baseline measurement and a second time following a 1-week interval. CONCLUSIONS: The adapted version of the Bowel Function in the Community instrument demonstrates adequate validity and reliability for use in research in the Brazilian population.