Table 2.

Frequencies of the Susceptibility Allele among Transmitted and Nontransmitted Haplotype Groups in Sib Samples and Random Samples

	Mean Frequency of Susceptibility Allelea
Sample Type	Transmitted Haplotypes	Nontransmitted Haplotypes	Mean Difference of Allele Frequency
Sib	.54	.26	.28
Random	.42	.20	.22

^aMean values were calculated on the basis of all 2,500 replicates.