IL1A and diabetes mellitus: None association between IL-1A (−889C/T) SNP or a so-called “double genotype” (IL-1A (−889C/T)/IL-1B (+3953C/T)) and CP and/or DM was found, but the IL-1B∗T allele (+3953C/T) was less frequent in CP patients than in healthy controls (21.4% vs. 28.0%, P < 0.05, OR = 0.70, 95%CI = 0.52–0.94).