Type 2 diabetes IFG/IGT NGT
Genotype n (%) OR (95% CI)a n (%) OR (95% CI)a n (%)
CYP1A2*1C          
GG 101 (56.7) 1.00 (referent) 313 (56.2) 1.00 (referent) 862 (57.1)
GA 70 (39.3) 1.04 (0.75-1.45) 210 (37.7) 1.02 (0.83-1.26) 555 (36.8)
AA 7 ( 3.9) 0.61 (0.27-1.37) 34 (6.1) 0.98 (0.64-1.50) 92 (6.1)
GA + AA 77 (43.3) 0.98 (0.71-1.35) 244 (43.8) 1.02 (0.83-1.24) 647 (42.9)
CYP1A2*1F          
AA 71 (39.7) 1.00 (referent) 253 (45.3) 1.00 (referent) 654 (43.3)
 CA 81 (45.3) 1.15 (0.82-1.63) 242 (43.3) 0.96 (0.78-1.19) 661 (43.7)
 CC 27 (15.1) 1.33 (0.82-2.16) 64 (11.4) 0.86 (0.62-1.19) 197 (13.0)
CA + CC 108 (60.3) 1.19 (0.86-1.65) 306 (54.7) 0.94 (0.77-1.15) 858 (56.7)
IFG, impaired fasting glycemia; IGT impaired glucose tolerance; NGT, normal glucose tolerance; OR, odds ratio; CI, confidence interval.
aAdjusted for age, hospital, rank in the Self-Defense Forces, cigarette smoking, leisure-time physical activity, body mass index, current use of alcoholic beverages (sake, shochu, beer, whisky and wine), past alcohol use and green tea intake.
Table 2: Relationship between CYP1A2*1C and CYP1A2*1F polymorphisms and impaired glucose metabolism.
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