From: A functional PTPN22polymorphism associated with several autoimmune diseases is not associated with IgA deficiency in the Spanish population
IgAD patients (%)
Controls (%)
Genotype
CC
225 (86.9)
402 (89.4)
CT
32 (12.3)
50 (11.0)
TT
2 (0.8)
3 (0.6)
Allele
C
482 (93.0)
854 (93.9)
T
36 (7.0)
56 (6.1)