Table 1

Risk analysis of colorectal cancer (CRC) in first-degree relatives of patients with hyperplastic polyposis syndrome compared with population-based data from the Eindhoven Cancer Registry

GroupPerson-yearsObserved CRCsExpected CRCsRR (observed/expected)95% CI
Males4736152.36.53.9 to 10.8
Females6317122.64.62.6 to 8.0
Combined11053275.05.43.7 to 7.8