Table 2.

Estimates of RR in first-, second-, and third-degree relatives for the same type of sarcoma

Group	Relationship	Number of Relatives	Cases Observed	Cases Expected	Relative Risk	1 T 95% CI
Balanced translocation
	first-degree	1454	0	0.22	N/A	N/A
	second-degree	4235	0	0.45	N/A	N/A
	third-degree	10982	0	0.94	N/A	N/A
Complex genotype/karyotype
	first-degree	10,201	12	8.95	1.34	0.77, 2.17
	second-degree	33,483	22	20.22	1.09	0.74, 1.55
	third-degree	88,900	51	53.14	0.96	0.75, 1.21