Rawl's questionnaire spanish validation for colorectal cancer screening with faecal occult blood testing

Abstract

Introduction: Colorectal cancer 5-years-survival is 57%, partway due to a low rate of participation in screening programmes. Instruments analyzing causes of low adherence are needed.

Objective: To evaluate the validity and internal consistency of the Spanish version of Rawl's Questionnaire for the screening of colorectal cancer by faecal occult blood testing.

Type of study: Questionnaire validation methodology.

Location: Three Primary Care Centres in Valencia.

Variables: Age, sex, civil status, educational level, social class, smoking, alcohol consumption, body mass index, personal and family history of cancer.

Results: We analyzed 408 individuals (237 cases and 171 controls). Mean age was 59.45 years (SD 5.17). Internal consistency of all variables reached a Cronbach's alfa of 0.796. The Cronbach's alfa benefit dimension of the screening was 0.871 and for the barrier dimension of the screening it was 0.817. Intraclass correlation coefficients of the test-retest for the benefit dimension of the screening was 0.809 (CI 95% 0.606-0.913) and 0.499 (CI 95% 0.126-0.750) for the barrier dimension.

Conclusion: The Spanish version of Rawl's Questionnaire is valid, reliable and reproducible, so we have this validated instrument with which to identify barriers and benefits in a colorectal screening programme in Spain.

Keywords: Atención primaria; Colorectal cancer screening; Cribado cáncer colorrectal; Health Belief Model; Modelo de creencias en salud; Primary Care; Questionnaire; Validación de cuestionarios; Validation.