A summary of family-based association analyses (FBAT; additive model and biallelic tests). Each column in the charts represents the -log FBAT P value for each marker located at a distance relative to one another. D5S1953 is positioned at 0 distance. Chart ALL shows analysis of 226 ankylosing spondylitis (AS) nuclear families with 894 persons. Chart Women shows analysis of 127 AS families with 184 affected women. Chart Men shows analysis of 168 AS families with 282 affected men.