{{Rsnum
|rsid=3757472
|Gene=DDC
|Chromosome=7
|position=50470285
|Orientation=minus
|GMAF=0.3696
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(G;G)
|geno2=(G;T)
|geno3=(T;T)
|Gene_s=DDC
}}per OMIM, Ma et al. (2005) {{PMID|15879433}} found two different DDC haplotypes associated with [[nicotine dependence]] in African Americans and European Americans (with measures of [[smoking]] quantity [SQ], heaviness of smoking index [HSI], and the Fagerstrom test for ND [FTND])
*in African Americans, [[rs921451]](T), [[rs3735273]](G), [[rs1451371]](T), [[rs2060762]](G), all three measures sig. associated after correction for multiple testing
*in European Americans, [[rs921451]](T), [[rs3735273]](G), [[rs1451371]](T), [[rs3757472]](G), which showed a sig. assoc. w/ the SQ and FTND score

[[Addiction]]
{{omim
|desc=TOBACCO [[Addiction]], SUSCEPTIBILITY TO
|id=188890
|rsnum=3757472
}}

{{omim
|desc=DOPA DECARBOXYLASE; DDC
|id=107930
|rsnum=3757472
}}

{{on chip | 23andMe v1}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}