BACKGROUND: We tried to find the possible "downstream" approach for the low-risk asymptomatic population surveillance for @entity14 by fecal occult blood test (FOBT) and @entity8364 ( @entity8364 ) with the factors of age and gender. @entity1 AND METHODS: Retrospectively, 2187 asymptomatic low-risk cases received complete FOBT and @entity8364 . These cases also received complete colonoscopy ( @entity1577 ) for definite diagnosis and were separated into two groups by age (age < or = 49 vs. age > or = 50 groups) and gender (male and female groups). RESULTS: The sensitivity and specificity to FOBT and @entity8364 were 44% and 98%, and 65% and 100% respectively for all cases. Significant positive FOBT, @entity8364 and @entity1577 results were noted in the age > or = 50 group (p=0.002, <0.001, <0.001, respectively). Positive @entity8364 and @entity1577 results were significantly noted in the male group (p=0.012, 0.009, respectively). After combination of age and gender factors, a positive FOBT result was significant in female cases with age > or = 50 years (p =0.006). Positive @entity8364 and @entity1577 results were significant in male cases with age > or = 50 (both p<0.001). CONCLUSION: In the surveillance of a low-risk asymptomatic population for @entity14 , repeated FOBT might be considered in @entity1 of age < or = 49 years regardless of gender. In female and age > or = 50 years, FOBT might be considered first and then @entity8364 could be performed in positive FOBT cases. In male and age > or = 50 cases, @entity8364 was considered first without FOBT for the surveillance.

Influence of age and gender on surveillance for XXXX in low-risk asymptomatic population.

@entity1 :: ('9606', 'Species') :: ['PATIENTS', 'people'] @entity8364 :: ('MESH:D002375', 'Disease') :: ['flexible sigmoidoscopy', 'FS'] @entity1577 :: ('MESH:D003550', 'Disease') :: ['CF'] @entity14 :: ('MESH:D015179', 'Disease') :: ['colorectal tumor', 'colorectal tumors']
@entity14 :: (MESH:D015179,Disease) :: ['colorectal tumors']
