FcγRIIa, FcγRIIIa, and FcγRIIIb gene polymorphisms and carriage rate of the Rare (R)-allele in case-control studies and association with susceptibility to chronic periodontitis.
nr = not reported. = association not found. = association found. Mainly Caucasian, actual % of subjects of non-Caucasian heritage is not provided. Cases diagnosed as adult periodontitis. Cases diagnosed as mixed periodontitis status N-allele is associated with periodontitis in smokers.