Table 2.

Repeat length frequency by race

	Whites			Blacks
Repeat length‡	Case n (%)	Control n (%)	p-value	Case n (%)	Control n (%)	p-value
A. All VTE
S/S	47 (11.3)	58 (11.4)	p=0.49	26 (5.9)	14 (3.2)	p=0.02
S/M	170 (40.9)	212 (41.5)		72 (16.4)	86 (19.4)
S/L	9 (2.2)	21 (4.1)		49 (11.1)	43 (9.7)
M/M	161 (38.7)	191 (37.4)		91 (20.7)	112 (25.3)
M/L	29 (7.0)	28 (5.5)		131 (29.8)	143 (32.3)
L/L	0	1 (0.2)		71 (16.1)	45 (10.2)
B. Idiopathic VTE
S/S	17 (10.7)	58 (11.4)	p=0.40	7 (3.8)	14 (3.2)	p=0.78
S/M	71 (44.7)	212 (41.5)		34 (18.3)	86 (19.4)
S/L	1 (0.6)	21 (4.1)		20 (31.8)	43 (9.7)
M/M	61 (38.4)	191 (37.4)		43 (23.1)	112 (25.3)
M/L	9 (24.3)	28 (5.5)		56 (30.1)	143 (32.3)
L/L	0	1 (0.2)		26 (14.0)	45 (10.2)
C. Provoked VTE
S/S	30 (11.7)	58 (11.4)	p=0.72	19 (7.5)	14 (3.2)	p=0.002
S/M	99 (38.5)	212 (41.5)		38 (15.0)	86 (19.4)
S/L	8 (3.1)	21 (4.1)		29 (11.4)	43 (9.7)
M/M	100 (38.9)	191 (37.4)		48 (18.9)	112 (25.3)
M/L	20 (7.8)	28 (5.5)		75 (29.5)	143 (32.3)
L/L	0	1 (0.2)		45 (17.7)	45 (10.2)
D. First event
S/S	36 (11.4)	58 (11.4)	p=0.59	23 (6.5)	14 (3.2)	p=0.09
S/M	134 (42.5)	212 (41.5)		58 (16.4)	86 (19.4)
S/L	6 (22.2)	21 (4.1)		42 (11.9)	43 (9.7)
M/M	120 (38.1)	191 (37.4)		78 (22.1)	112 (25.3)
M/L	19 (6.0)	28 (5.5)		105 (29.8)	143 (32.3)
L/L	0	1 (0.2)		47 (13.3)	45 (10.2)
E. Recurrent VTE
S/S	11 (10.9)	58 (11.4)	p=0.54	3 (3.5)	14 (3.2)	p=0.0008
S/M	36 (35.6)	212 (41.5)		14 (16.1)	86 (19.4)
S/L	3 (3.0)	21 (4.1)		7 (8.1)	43 (9.7)
M/M	41 (40.6)	191 (37.4)		13 (14.9)	112 (25.3)
M/L	10 (9.9)	28 (5.5)		26 (29.9)	143 (32.3)
L/L	0	1 (0.2)		24 (27.6)	45 (10.2)

^‡‘S’ is ≤25, ‘M’ is 26–33, and ‘L’ is ≥34.