Table 2

Family network composition for study participants in five HNPCC-carrier families, 1999–2000

Family AFamily BFamily C1Family C2Family D
No. of respondents97578
Mean no. in each participant’s network (SD)19.9 (4.4)18.6 (5.2)25.0 (11.3)21.7 (4.5)24.6 (5.6)
Biological or marital family, mean % (SD)79.6 (10.0)81.2 (12.0)80.4 (13.0)79.2 (7.4)84.0 (9.6)
Biological family, mean % (SD)50.4 (23.2)68.6 (14.2)49.2 (14.0)62.1 (22.0)45.4 (14.9)
Family members at risk for carrying the HNPCCmutation, mean % (SD)51.1 (13.4)60.3 (15.3)45.7 (14.1)52.3 (9.8)48.7 (11.3)
Female, mean % (SD)59.0 (8.9)50.7 (7.4)57.9 (5.8)36.3 (6.5)52.5 (8.5)