CONSTIPATION SCORING SYSTEM VALIDATED FOR THE PORTUGUESE LANGUAGE (ÍNDICE DE GRAVIDADE DA CONSTIPAÇÃO INTESTINAL): IS IT RELIABLE IN ASSESSING THE SEVERITY OF INTESTINAL CHRONIC CONSTIPATION IN OUR POPULATION?

O INSTRUMENTO CONSTIPATION SCORING SYSTEM VALIDADO PARA A LÍNGUA PORTUGUESA (ÍNDICE DE GRAVIDADE DA CONSTIPAÇÃO INTESTINAL): É CONFIÁVEL NA AVALIAÇÃO DA GRAVIDADE DA CONSTIPAÇÃO INTESTINAL CRÔNICA EM NOSSA POPULAÇÃO?

ABSTRACT

BACKGROUND:

There is a lack of valid and specific tools to measure chronic constipation severity in Brazil.

AIMS:

To validate the Constipation Scoring System for Brazilian spoken Portuguese.

METHODS:

Translation, cultural adaptation, and validation itself (reliability and convergent and divergent validation). Translation: definitive version from the original version’s translation and evaluation by specialists. Cultural adaptation: score content analysis of the definitive version, as an interview to patients. Interobserver reliability: application by two researchers on the same day. Intraobserver reliability: same researcher at different times, in a 7-day interval. Divergent validation: non-constipated volunteers. Convergent validation: two groups, good response to clinical treatment and refractory to treatment.

RESULTS:

Cultural adaptation: 81 patients, 89% female, with mean age of 55 and seven years of schooling, and overall content validity index was 96.5%. Inter and intraobserver reliability analysis: 60 patients, 86.7% female, mean age of 56 and six years of schooling, and the respective intraclass correlation coefficients were 0.991 and 0.987, p<0.001. Divergent validation: 40 volunteers, 25 male, mean age of 49 years, and the mean global score was 2. Convergent validation of patients with good response to clinical treatment: 47 patients, 39 female, mean age of 60 and six years of schooling, and the pre- and post-treatment scores were 19 and 8, respectively (p<0.001). Convergent validation of refractory to clinical treatment patients: 75 patients, 70 female, mean age of 53 and seven years of schooling, and the global average score was 22.

CONCLUSIONS:

The Constipation Scoring System (Índice de Gravidade da Constipação Intestinal) validated for the Brazilian population is a reliable instrument for measuring the severity of intestinal chronic constipation.

HEADINGS:
Constipation; Validation Study; Indicators of Quality of Life; Severity of Illness Index