For the study 1000 families were interviewed during 1996 in the city of Den
izli, which is situated in Western Anatolia and has a population of 79 211
families. The overall rate of consanguinity was 11.7%, with a mean inbreedi
ng coefficient of 0.00873. The principal type of consanguineous marriage re
corded was between first cousins, which accounted for 49.6% of all unions.
For both sexes, a significant negative association was observed between con
sanguinity and mean age at marriage and level of education.