CCND1 and nasopharyngeal carcinoma: Subgroup analyses by ethnicity further showed that there was also no significant association between CCND1 G870A polymorphism and NPC risk in Asians (for the allele model A vs. G: OR = 0.89, 95% CI 0.56–1.41, p = 0.61; for the co-dominant model AA vs. GG: OR = 0.85, 95% CI 0.30–2.43, p = 0.77; for the dominant model AA/AG vs. GG: OR = 0.94, 95% CI 0.42–2.13, p = 0.89; for the recessive model AA vs. AG/GG: OR = 0.83, 95% CI 0.45–1.55, p = 0.56) (Table 4).