XRCC1 and familial pancreatic carcinoma: There was no significant association between XRCC1 gene c.1471G > A polymorphism and pancreatic cancer risk (allelic model, OR 0.914, 95% CI 0.467–1.789, P = 0.794; heterozygous model, OR 0.948, 95% CI 0.547–1.641, P = 0.848; homozygous model, OR 0.860, 95% CI 0.210–3.513, P = 0.833; dominant model, OR 0.915, 95% CI 0.444–1.886, P = 0.810; recessive model, OR 0.879, 95% CI 0.277–2.789, P = 0.827).