Clinical characteristics of patients in four groups of FBG levels
| Variables | Total (n=7265) | FBG <100 mg/dL (n=4357) | FBG 100–109 mg/dL (n=1540) | FBG 110–125 mg/dL (n=551) | FBG ≥126 mg/dL or DM (n=817) | P value |
| Age (years) | 51±10 | 48±10 | 53±9 | 54±8 | 59±9 | <0.001 |
| Gender, men (%) | 5804 (79.9) | 3287 (75.4) | 1356 (88.1) | 492 (89.3) | 669 (81.9) | <0.001 |
| Body mass index (kg/m2) | 23.5±3.3 | 22.8±3.1 | 24.1±3.0 | 25.0±3.4 | 25.3±3.9 | <0.001 |
| Heart rate (beats/min) | 64±10 | 63±10 | 64±11 | 65±10 | 66±11 | <0.001 |
| Systolic blood pressure (mm Hg) | 127±16 | 124±16 | 130±16 | 132±16 | 134±17 | <0.001 |
| Diastolic blood pressure (mm Hg) | 80±12 | 78±12 | 82±11 | 83±12 | 81±11 | <0.001 |
| Total cholesterol (mg/dL) | 201±34 | 200±32 | 207±34 | 207±36 | 192±37 | <0.001 |
| Triglycerides (mg/dL) | 128±92 | 116±81 | 139±92 | 153±98 | 154±127 | <0.001 |
| HDL-C (mg/dL) | 59±16 | 61±16 | 58±15 | 56±15 | 53±15 | <0.001 |
| LDL-C (mg/dL) | 117±30 | 116±29 | 122±30 | 122±33 | 109±32 | <0.001 |
| Creatinine (mg/dL) | 0.82±0.17 | 0.81±0.16 | 0.84±0.17 | 0.83±0.16 | 0.82±0.21 | <0.001 |
| Uric acid (mg/dL) | 5.8±1.4 | 5.6±1.4 | 6.1±1.3 | 6.2±1.4 | 5.8±1.4 | <0.001 |
| FBG (mg/dL) | 101±20 | 91±6 | 104±3 | 115±4 | 139±36 | <0.001 |
| Hemoglobin A1c (%) | 5.7±0.7 | 5.4±0.3 | 5.6±0.3 | 5.8±0.3 | 6.9±1.0 | <0.001 |
| Medical history, n (%) | ||||||
| Hypertension | 3188 (43.9) | 1488 (34.2) | 763 (49.6) | 306 (55.6) | 631 (77.3) | <0.001 |
| Dyslipidemia | 3760 (51.8) | 1867 (42.9) | 912 (59.3) | 374 (68.0) | 607 (74.4) | <0.001 |
| DM | 685 (9.4) | 0 | 0 | 0 | 685 (83.8) | <0.001 |
| CVD, n (％) | 689 (9.5) | 214 (4.9) | 137 (8.9) | 71 (12.9) | 267 (32.7) | <0.001 |
| Current smoking, n (％) | 2189 (30.3) | 1355 (31.2) | 456 (29.7) | 161 (29.5) | 217 (27.2) | 0.12 |
| Medication, n (％) | ||||||
| Antihypertensive drugs | 2009 (27.7) | 829 (19.0) | 480 (31.2) | 200 (36.4) | 500 (61.3) | <0.001 |
| Lipid-lowering drugs | 1116 (15.4) | 402 (9.2) | 238 (15.5) | 106 (19.3) | 370 (45.3) | <0.001 |
| Antidiabetic drugs | 489 (6.7) | 0 (0) | 0 (0) | 0 (0) | 489 (60.0) | <0.001 |
CVD, cardiovascular disease; DM, diabetes mellitus; FBG, fasting blood glucose; HDL-C, high-density lipoprotein cholesterol; LDL-C, low-density lipoprotein cholesterol.