Table 1 Baseline characteristics of the study subjects according to initial serum fasting glucose level
Variables | Normal | IFG | DM | p-value* |
|---|---|---|---|---|
n = 633 (84.5 %) | n = 98 (13.1 %) | n = 18 (2.4 %) | ||
Demographic variables | ||||
 Sexa |  |  |  | 0.005 |
  Male | 561 (83.1) | 97 (14.4) | 17 (2.5) |  |
  Female | 72 (97.3) | 1 (1.4) | 1 (1.4) |  |
 Age (year)b | 38.9 ± 7.95 | 45.4 ± 7.79 | 47.0 ± 8.68 | 0.000 |
 Work duration (year)b | 9.2 ± 7.67 | 15.1 ± 8.43 | 15.8 ± 6.41 | 0.000 |
 Occupationa |  |  |  | 0.056 |
  Office work | 110 (79.1) | 21 (15.1) | 8 (5.8) |  |
  Production work | 442 (85.8) | 65 (12.6) | 8 (1.6) |  |
  Research work | 81 (85.3) | 12 (12.6) | 2 (2.1) |  |
 Job positiona |  |  |  | 0.000 |
  Executive | 159 (70.4) | 56 (24.8) | 11 (4.9) |  |
  General | 474 (90.6) | 42 (8.0) | 7 (1.3) |  |
Health related behaviorsa | Â | Â | Â | Â |
 Alcohol drinking |  |  |  | 0.989 |
  Healthy drinking | 393 (84.8) | 60 (12.8) | 11 (2.4) |  |
  Unhealthy drinking | 235 (84.5) | 36 (12.9) | 7 (2.5) |  |
 Smoking |  |  |  | 0.647 |
  Non-smoker | 308 (84.8) | 49 (13.5) | 6 (1.7) |  |
  Ex-smoker | 81 (81.8) | 14 (14.1) | 4 (4.0) |  |
  Current smoker | 240 (84.8) | 35 (12.4) | 8 (2.8) |  |
 Exercise per week |  |  |  | 0.118 |
  0 | 233 (86.9) | 25 (9.3) | 10 (3.7) |  |
  1-2 | 265 (82.8) | 49 (15.3) | 6 (1.9) |  |
   > 3 | 125 (85.6) | 19 (13.0) | 2 (1.4) |  |
Laboratory test resultsb | ||||
 BMI (kg/m2) | 23.5 ± 2.95 | 24.6 ± 2.72 | 25.3 ± 2.98 | 0.000 |
 Systolic BP (mmHg) | 115.6 ± 11.15 | 123.4 ± 14.68 | 125.6 ± 11.74 | 0.000 |
 Diastolic BP (mmHg) | 70.8 ± 7.65 | 77.1 ± 11.39 | 76.3 ± 8.77 | 0.000 |
 Hemoglobin (g/dL) | 14.3 ± 1.37 | 14.6 ± 1.13 | 14.8 ± 1.23 | 0.032 |
 AST (IU/L) | 24.3 ± 8.81 | 25.9 ± 18.90 | 31.7 ± 28.47 | 0.015 |
 ALT (IU/L) | 26.7 ± 17.91 | 32.8 ± 30.00 | 46.4 ± 40.64 | 0.000 |
 γ-GTP (IU/L) | 36.2 ± 28.29 | 53.6 ± 45.80 | 67.4 ± 66.67 | 0.000 |
 Total cholesterol (mg/dL) | 188.9 ± 33.32 | 197.5 ± 36.59 | 221.7 ± 45.49 | 0.000 |
 Triglyceride (mg/dL) | 135.2 ± 98.86 | 162.3 ± 80.80 | 175.3 ± 107.62 | 0.018 |
 HDL-C (mg/dL) | 55.6 ± 12.37 | 52.0 ± 11.86 | 57.5 ± 15.67 | 0.032 |