The purpose of this study is to verify the efficacy of a strategy to screen colorectal cancer(CCR) and adenomas using the faecal occult blood test(PSO) and a questionnaire (QSA)based in signs and symptoms of CCR. METHODS: A program of prevention was done, and the patients answered the QSA and did the PSO type imunocromatograph. RESULTS: 387 people adhered do the program, 93 were excluded. Three groups were formed: 1: 20 persons, with PSO positive, 2:38 persons with QSA positive, and 3, with 21 persons with PSO and QSA negatives. Group 1 presented a sensibility of 22%, specificity of 74%, Likelihood ratio + of 0,9, accuracy of 56,9, Positive predictive value(VPP) of 31,6 and negative(VPN) of 64. Group 2 presented sensibility of 71,4%, 45,6% of specificity, Likelihood ratio + 1.3, accuracy of 52,6, VPP de 32,6 e VPN de 81,3. The QSA plus PSO method, presented a sensibility of 95,2%, 63,2 of specificity, accuracy of 71,8 ,Likelihood ratio of 2,6, VPP de 48,8 e VPN 81,3. In conclusion the method of PSO and QSA are complementary and seem effective in screening for CCR in preventive programs.
Colon Neoplasias; Colonoscopy; Diagnostic; Anamnesis; Health Foster
