A formal kinship analysis of asthma in a large Hutterite kindred indicates
that cases are significantly more related to one another than are age match
ed controls. The higher kinship coefficient is shown to be due to an increa
sed probability of the condensed identity state Delta (8) which, in turn, i
s shown to be due to an increased probability of detailed identity state de
lta (10). ((C)) 2001 Wiley-Liss, Inc.