Table 3.

Normalized Sibship Statistics for Three Affected Siblings

	Normalized Coefficient for Statistic
IBD Configurationa	SApairs	SGHpairs	Sall	SX75	SX50
Three males:
(1 1 1)	1.73	1.73	1.73	1.73	1.73
(1 1 2)	−.58	−.58	−.58	−.58	−.58
Two males–one female:
(1 1 13)	1.73	1.63	1.70	1.71	1.63
(2 2 13)	−.58	.00	−.24	−.34	.00
(1 2 13)	−.58	−.82	−.73	−.69	−.82
One male–two females:
(1 13 13)	1.73	1.67	1.71	1.71	1.73
(1 13 23)	−.58	−.33	−.43	−.43	−.58
(2 13 13)	−.58	−1.00	−.85	−.85	−.58
Three females:
(13 13 13)	1.73	1.73	1.73	1.73	1.73
(13 13 23)	−.58	−.58	−.58	−.58	−.58

^aThe mother's allele labels are 1/2, and the father's allele label is 3.