{{Rsnum
|rsid=2227981
|Gene=PDCD1
|Chromosome=2
|position=241851121
|Orientation=minus
|ReferenceAllele=T
|GMAF=0.3806
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
|Gene_s=PDCD1
}}{{PMID Auto
|PMID=19468750
|Title=Programmed death-1 (PD-1) gene polymorphisms lodged in the genetic predispositions of Kawasaki Disease
}}{{PMID|18045485|OA=1
}} The candidate genes TAF5L, TCF7, PDCD1, IL6 and ICAM1 cannot be excluded from having effects in type 1 diabetes.

{{PMID|19234630|OA=1
}} PDCD1 genes may protect against extraocular manifestations in Chinese Han patients with Vogt-Koyanagi-Harada syndrome.

{{PMID|21269571}} Association of polymorphisms in the programmed cell death 1 (PD-1) and PD-1 ligand genes with ankylosing spondylitis in a Chinese population.

{{PMID|21487727}} PD-1 polymorphisms are associated with sporadic breast cancer in Chinese Han population of Northeast China.
{{PMID Auto
|PMID=24804191
|Title=A Promoter Region Polymorphism in PDCD-1 Gene Is Associated with Risk of Rheumatoid Arthritis in the Han Chinese Population of Southeastern China
|OA=1
}}
{{PMID Auto
|PMID=24834269
|Title=Programmed death-1 gene polymorphism (PD-1.5 C/T) is associated with gastric cancer
|OA=1
}}