CROSS-CULTURAL ADAPTATION AND VALIDATION OF THE CONSTIPATION SCORING SYSTEM FOR THE BRAZILIAN POPULATION

Area of Science:

• Gastroenterology
• Clinical Assessment Tools
• Psychometrics

Background:

• Functional constipation assessment beyond Rome IV criteria.
• The Constipation Scoring System (CSS) aids in measuring dysfunction and guiding treatment.
• CSS standardizes results in functional constipation research.

Purpose of the Study:

• Translate and cross-culturally adapt the CSS for Brazilian Portuguese speakers.
• Validate the adapted CSS for the Brazilian population.

Main Methods:

• Four-step adaptation process: translation, back translation, application, and adjustments.
• Validation through test-retest reliability analysis.
• Convergent validity assessed against Rome IV Criteria.

Main Results:

• High convergent validity between Brazilian CSS and Rome IV Criteria (Spearman's r² = 0.816, P<0.001).
• Excellent test-retest reliability with Cronbach's Alpha of 0.972.
• High internal consistency and adequate internal reliability for individual items.

Conclusions:

• The Portuguese version of the CSS is well-adapted and accepted by the Brazilian population.
• Demonstrates linguistic and psychometric validity for clinical use and research in Brazil.