Table 1
Frequency of the P1A
2
allele in SLE, RA, SSc and HBD cohorts
P1A
2
frequency
SLE
(n=109)
RA
(n=161)
SSc
(n=54)
HBD
(n=128)
A
1
69.7
75.2
81.5
75.8
A
1
/A
2
28.4
21.7
18.5
23.4
A
2
1.8
3.1
–
0.8