Table 2 Comparison of initial variables according to the blood glucose level change over 7-years interval
Variables | Staying normal | IFG or DM | p-value* |
|---|---|---|---|
(n = 508, 87.9 %) | (n = 70, 12.1 %) | ||
Demographic variables | |||
 Sexa |  |  | 0.534 |
  Male | 452 (87.6) | 64 (12.4) |  |
  Female | 56 (90.3) | 6 (9.7) |  |
 Age (year)b | 38.3 ± 7.89 | 39.5 ± 6.63 | 0.155 |
 Work duration (year)b | 8.7 ± 7.67 | 9.8 ± 6.97 | 0.252 |
 Occupationa |  |  | 0.343 |
  Office work | 87 (83.7) | 17 (16.3) |  |
  Production work | 350 (88.8) | 44 (11.2) |  |
  Research work | 71 (88.8) | 9 (11.3) |  |
 Job positiona |  |  | 0.925 |
  Executive | 126 (88.1) | 17 (11.9) |  |
  General | 382 (87.8) | 53 (12.2) |  |
Health related behaviorsa | |||
 Alcohol drinking |  |  | 0.311 |
  Healthy drinking | 322 (89.0) | 40 (11.0) |  |
  Unhealthy drinking | 186 (86.1) | 30 (13.9) |  |
 Smoking |  |  | 0.304 |
  Non-smoker | 258 (89.9) | 29 (10.1) |  |
  Ex-smoker | 63 (87.5) | 9 (12.5) |  |
  Current smoker | 187 (85.4) | 32 (14.6) |  |
 Exercise per week |  |  | 0.995 |
  0 | 185 (87.7) | 26 (12.3) |  |
  1-2 | 214 (87.7) | 30 (12.3) |  |
   ≥ 3 | 103 (88.0) | 14 (12.0) |  |
Laboratory test resultsb | |||
 BMI (kg/m2) | 23.3 ± 2.83 | 24.9 ± 3.34 | 0.000 |
 Systolic BP (mmHg) | 115.0 ± 11.07 | 120.2 ± 11.87 | 0.000 |
 Diastolic BP (mmHg) | 70.6 ± 7.74 | 73.6 ± 7.12 | 0.002 |
 Hemoglobin (g/dL) | 14.3 ± 1.33 | 14.5 ± 1.24 | 0.118 |
 AST (IU/L) | 24.0 ± 8.44 | 26.2 ± 11.77 | 0.125 |
 ALT (IU/L) | 26.0 ± 17.86 | 32.0 ± 19.29 | 0.009 |
 γ-GTP (IU/L) | 34.8 ± 27.06 | 44.3 ± 28.78 | 0.006 |
 Total cholesterol (mg/dL) | 188.2 ± 33.82 | 194.0 ± 32.52 | 0.189 |
 Triglyceride (mg/dL) | 130.0 ± 90.60 | 156.8 ± 137.36 | 0.038 |
 HDL-cholesterol (mg/dL) | 56.1 ± 12.58 | 52.1 ± 10.47 | 0.015 |