title: Psoriasis: case rate--HL-A antigen frequency correlations.
abstract: HL-A antigen B17, associated with a high familial frequency of psoriasis, is significantly correlated (r=0.8242) with psoriasis case rates in several countries but HL-A antigen B13 alone, associated with 'early age onset' cases of psoriasis, is not significantly correlated (r=0.4299) with case rate. A sum of the B13 and B17 antigen frequencies, since either antigen has been associated to psoriasis, is correlated with case rate in the populations surveyed (r=0.7405) and is statistically significant.
mesh_terms: D000367:Age Factors; D005787:Gene Frequency; D006680:HLA Antigens / Q000032:analysis; D006649:Histocompatibility Antigens / Q000032:analysis; D006801:Humans; D011565:Psoriasis / Q000453:epidemiology* / Q000235:genetics; D044469:Racial Groups
chemical_list: D006680:HLA Antigens; D006649:Histocompatibility Antigens