Table 1. Clinical characteristics of the study subjects.
| Parameters | NFG | IFG | IGT | T2DM | P a |
| (n = 282) | (n = 287) | (n = 293) | (n = 302) | ||
| Gender | |||||
| Male | 136 (48.23) | 148 (51.57) | 153 (52.22) | 147 (48.68) | 0.703 |
| Female | 146 (51.77) | 139 (48.43) | 140 (47.78) | 155 (51.32) | |
| Age | 63±3.51 | 67±2.72 | 69±3.86 | 68±1.99 | 0.992 |
| Waist (m) | 0.51±0.01 | 0.55±0.01 | 0.61±0.01 | 0.63±0.01 | 0.000 |
| BMI (kg/m2) | 20.79±1.30 | 23.37±0.44 | 27.18±0.47 | 26.35±0.42 | 0.000 |
| SBP (mmHg) | 110.12±5.82 | 119.59±2.90 | 125.47±2.1 | 128.51±3.79 | 0.001 |
| DBP (mmHg) | 72.39±4.32 | 90.11±2.79 | 99.91±2.7 | 102.89±2.15 | 0.000 |
| FPG (mmol/L) | 4.63±0.83 | 6.45±0.29 | 6.51±0.23 | 7.60±0.65 | 0.001 |
| 2 h PG (mmol/L) | 5.09±1.37 | 6.49±0.65 | 8.76±1.23 | 12.08±0.59 | 0.000 |
Gender is expressed as n (%). All other parameters are expressed as mean ± S.D. BMI, body mass index; SBP, systolic blood pressure; DBP, diastolic blood pressure; FPG, fasting plasma glucose; 2 h PG, 2-hour plasma glucose in the OGTT. a Comparison of four groups via analysis of variance (continuous variables) or χ2-test (count variables).