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. 2021 Feb 12;100(6):e24464. doi: 10.1097/MD.0000000000024464

Table 3.

Stratified meta-analyses of the correlation between UCP2 rs660339 polymorphism and risk of T2DM.

T vs. C (allele model) CT+CC vs. TT (dominant model) CC vs. TT+CT (recessive model) CC vs. TT (homozygous model) CT vs. TT (heterozygous model)
Characteristics No. of studies Sample size (case/control) OR (95%CI) P OR (95%CI) P OR (95%CI) P OR (95%CI) P OR (95%CI) P
Total 9 3042/2388 1.066 (0.887–1.282) .494 1.056 (0.827–1.349) .663 1.132 (0.851–1.506) .393 1.160 (0.803–1.676) .430 1.026 (0.825–1.276) .820
Ethnicity
 Asian 7 2016/1676 1.034 (0.825–1.296) .774 0.994 (0.760–1.300) .962 1.126 (0.767–1.653) .545 1.107 (0.695–1.762) .669 0.965 (0.776–1.199) .745
 Caucasian 2 1026/712 1.186 (0.777–1.808) .429 1.291 (0.612–2.725) .502 1.148 (0.882–1.494) .305 1.369 (0.655–2.863) .404 1.256 (0.592–2.668) .553
Source of control
 Hospital-based 2 1671/1330 1.078 (0.912–1.272) .379 1.083 (0.844–1.388) .532 1.145 (0.840–1.560) .391 1.176 (0.829–1.668) .363 1.054 (0.811–1.370) .692
 Population-based 4 553/591 1.182 (0.798–1.751) .404 1.217 (0.743–1.996) .435 1.286 (0.717–2.309) .399 1.431 (0.655–3.127) .369 1.155 (0.770–1.732) .486
 Unknown 3 818/467 0.920 (0.775–1.091) .337 0.852 (0.654–1.110) .235 0.963 (0.665–1.395) .843 0.865 (0.607–1.232) .421 0.844 (0.561–1.271) .418
Genotyping method
 Others 5 1989/1665 1.001 (0.799–1.254) .995 1.013 (0.737–1.392) .935 0.979 (0.734–1.306) .886 1.005 (0.656–1.542) .980 1.020 (0.765–1.359) .893
 PCR-RFLP 4 1053/723 1.164 (0.827–1.637) .383 1.120 (0.723–1.737) .612 1.397 (0.769–2.537) .272 1.422 (0.691–2.925) .339 1.035 (0.698–1.536) .863
Quality
 High 6 2162/1842 1.115 (0.856–1.452) .421 1.127 (0.809–1.570) .480 1.191 (0.798–1.776) .392 1.273 (0.749–2.162) .372 1.084 (0.825–1.425) .562
 Low 3 880/546 0.975 (0.831–1.144) .760 0.920 (0.682–1.241) .586 1.046 (0.714–1.532) .819 0.966 (0.695–1.343) .837 0.904 (0.600–1.362) .628

CI = confidence interval, OR = odds ratio, PCR-RFLP = polymerase chain reaction-restriction fragment length polymorphis, T2DM = type 2 diabetes mellitus, UCP2 = uncoupling protein-2.