Table 1. Characteristics of participating relatives by case or control status.

	Case-relatives (n =1,492)	Control-relatives (n = 936)	P value
Age, median (range)	51.2 (18.2, 94.0)	51.2 (18.0, 93.2)	0.9050
Female (%)	57	58	0.7657
Relationship
Mother, n (col %)	239 (16)	137 (15)	0.2755
Father, n (col %)	150 (10)	88 (9)	0.5455
Sister, n (col %)	371 (25)	264 (28)	0.0864
Brother, n (col %)	239 (16)	165 (18)	0.2972
Daughter, n (col %)	211 (14)	118 (13)	0.3068
Son, n (col %)	146 (10)	77 (8)	0.2355
Spouse, n (col %)	136 (9)	87 (9)	0.8523