Table 8. Association of DRB1 SNP-Strings with MS (US particcipants)^*.

DRB1
	SNP-Strings
	a1	a2	a3	a4	a7	a8	a9
Cases
0-copies	405	250	332	357	361	417	453
1-copy	64	188	125	106	105	53	19
2-copies	3	34	15	9	6	2	0
Controls
0-copies	319	329	272	323	278	353	393
1-copy	93	81	125	87	123	60	22
2-copies	3	5	18	5	14	2	0
OR 1 allele	0.54	3.05	0.82	1.10	0.66	0.75	0.75
OR 2 alleles	0.79	8.95	0.68	1.63	0.33	0.85	na**
X2 (1 df) 1 allele	11.9	52.5	1.8	0.4	7.4	2.1	0.8
X2 (1 df) 2 allele	0.1	28.2	1.1	0.8	5.5	0	na**

*Data is taken from the “complete” analysis (see text). Only selected SNP-strings are displayed.

**na  =  not available (has a zero divisor).