Table 1

Baseline characteristics of subjects according to the quartiles of FPG variability (FPG-CV)

Q1 (n = 32,935)Q2 (n = 32,937)Q3 (n = 32,936)Q4 (n = 32,936)P
Age (years), mean (SD)55.9 (8.8)55.0 (8.4)55.1 (8.5)56.1 (9.0)<0.0001
Sex (male)16,493 (50.1)18,555 (56.3)19,481 (59.1)19,947 (60.6)<0.0001
BMI (kg/m2), mean (SD)23.8 (2.8)23.8 (2.8)23.8 (2.8)23.9 (2.9)0.9244
FPG (mg/dL), mean (SD)92.0 (8.9)91.2 (8.6)90.9 (8.0)90.9 (7.1)<0.0001
FPG variability, mean (SD)
 CV (%)4.19 (1.43)7.75 (0.88)10.99 (1.04)16.69 (3.37)<0.0001
 SD (mg/dL)3.85 (1.37)7.07 (1.03)9.99 (1.29)15.17 (3.19)<0.0001
 VIM (%)3.84 (1.32)7.07 (0.87)10.00 (1.05)15.19 (3.07)<0.0001
Family history of diabetes3,663 (11.1)3,817 (11.6)3,591 (10.9)3,307 (10.0)<0.0001
Hypertension17,572 (53.4)18,316 (55.6)18,914 (57.4)20,004 (60.7)<0.0001
Dyslipidemia10,265 (31.2)10,510 (31.9)10,726 (32.6)11,068 (33.6)<0.0001
Current smoker5,087 (15.4)6,016 (18.3)6,697 (20.3)7,284 (22.1)<0.0001
Alcohol consumption12,731 (38.7)14,028 (42.6)14,442 (43.8)14,202 (43.1)<0.0001
Regular exercise3,574 (10.9)3,211 (9.7)3,064 (9.3)3,192 (9.7)<0.0001
Income (lower 10%)2,171 (6.6)2,411 (7.3)2,572 (7.8)2,917 (8.9)<0.0001
  • Data are number of participants (%) unless otherwise specified. Q, quartile.