COMT and type 2 diabetes mellitus: Subjects with IGT or T2D had a trend to increase the odds for the T-genotype for 5HT2C and GG-genotype for COMT 24938A/G by 53% (OR = 1.53, CI = 0.90–2.61, p = 0.12) and 48% (OR = 1.48, CI = 0.91–2.41, p = 0.12), respectively compared to glucose-tolerant subjects (Table 4).