After the adjustment for possible covariates, the A allele of rs1800849 in UCP3 was significantly associated with prediabetes (aOR<sub>AA vs GG</sub> = 1.68, 95% CI: 1.02-2.78), and the association was also significant under the recessive model (aOR <sub>AA vs GA + GG</sub> = 1.64, 95% CI: 1.02-2.66).