Screening for linkage and association in nuclear families

We applied linkage analysis with a sib‐pair method, which also takes into account information on unaffected siblings, and family‐based methods of association analysis to determine the disease affecting loci in Problem 1. Whereas the first two disease loci were correctly identified by association analysis, the sib‐pair linkage method failed to detect the disease loci 3 and 4. We therefore determined the data structure and sample size necessary for demonstrating linkage to these loci. ©1995 Wiley‐Liss, Inc.