Table 4.

Normalized Sibship Statistics for Four Affected Siblings

	Normalized Coefficient for Statistic
IBD Configurationa	SApairs	SGHpairs	Sall	SX75	SX50
Four males:
(1 1 1 1)	2.45	2.45	2.62	2.45	2.45
(1 1 1 2)	.00	.00	−.24	.00	.00
(1 1 2 2)	−.82	−.82	−.56	−.82	−.82
Three males–one female:
(1 1 1 13)	2.45	2.32	2.57	2.42	2.32
(2 2 2 13)	.00	.77	.20	.35	.77
(1 1 2 13)	.00	−.26	−.33	−.12	−.26
(1 2 2 13)	−.82	−.77	−.59	−.81	−.77
Two males–two females:
(1 1 13 13)	2.45	2.26	2.51	2.41	2.33
(1 1 13 23)	.00	.52	.16	.27	.33
(1 2 13 13)	.00	−.52	−.48	−.27	−.33
(2 2 13 13)	−.82	−.52	−.48	−.80	−.33
(1 2 13 23)	−.82	−.87	−.69	−.80	−1.00
One male–three females:
(1 13 13 13)	2.45	2.32	2.50	2.40	2.45
(1 13 13 23)	.00	.26	.04	.16	.00
(2 13 13 13)	.00	−.77	−.66	−.48	.00
(2 13 13 23)	−.82	−.77	−.66	−.80	−.82
Four females:
(13 13 13 13)	2.45	2.45	2.55	2.45	2.45
(13 13 13 23)	.00	.00	−.11	.00	.00
(13 13 23 23)	−.82	−.82	−.70	−.82	−.82

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