Clinical characteristics of patients in six groups of FBG levels
| Variables | Total (n=7265) | FBG <90 mg/dL (n=1630) | FBG 90–94 mg/dL (n=1419) | FBG 95–99 mg/dL (n=1308) | 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 | 46±11 | 49±10 | 50±10 | 53±9 | 54±8 | 59±9 | <0.001 |
| Gender, men (%) | 5804 79.9) | 1105 (67.8) | 1092 (77.0) | 1090 (83.3) | 1356 (88.1) | 492 (89.3) | 669 (81.9) | <0.001 |
| Body mass index (kg/m2) | 23.5±3.3 | 22.2±3.1 | 22.9±3.1 | 23.6±3.0 | 24.1±3.0 | 25.0±3.4 | 25.3±3.9 | <0.001 |
| Heart rate (beats/min) | 64±10 | 62±9 | 63±10 | 63±10 | 64±11 | 65±10 | 66±11 | <0.001 |
| Systolic blood pressure (mm Hg) | 127±16 | 122±16 | 125±15 | 127±15 | 130±16 | 132±16 | 134±17 | <0.001 |
| Diastolic blood pressure (mm Hg) | 80±12 | 77±12 | 79±12 | 80±11 | 82±11 | 83±12 | 81±11 | <0.001 |
| Total cholesterol (mg/dL) | 201±34 | 197±33 | 201±32 | 202±32 | 207±34 | 207±36 | 192±37 | <0.001 |
| Triglycerides (mg/dL) | 128±92 | 107±81 | 118±83 | 126±77 | 139±92 | 153±98 | 154±127 | <0.001 |
| HDL-C (mg/dL) | 59±16 | 62±16 | 61±16 | 59±15 | 58±15 | 56±15 | 53±15 | <0.001 |
| LDL-C (mg/dL) | 117±30 | 114±29 | 118±28 | 123±30 | 122±30 | 122±33 | 109±32 | <0.001 |
| Creatinine (mg/dL) | 0.82±0.17 | 0.79±0.16 | 0.81±0.16 | 0.83±0.16 | 0.84±0.17 | 0.83±0.16 | 0.82±0.21 | <0.001 |
| Uric acid (mg/dL) | 5.8±1.4 | 5.4±1.4 | 5.7±1.4 | 5.9±1.3 | 6.1±1.3 | 6.2±1.4 | 5.8±1.4 | <0.001 |
| FBG (mg/dL) | 101±20 | 85±4 | 92±1 | 97±1 | 104±3 | 115±4 | 139±36 | <0.001 |
| Hemoglobin A1c (%) | 5.7±0.7 | 5.4±0.3 | 5.4±0.3 | 5.5±0.3 | 5.6±0.3 | 5.8±0.3 | 6.9±1.0 | <0.001 |
| Medical history, n (%) | ||||||||
| Hypertension | 3188 (43.9) | 434 (26.6) | 501 (35.3) | 553 (42.3) | 763 (49.6) | 306 (55.6) | 631 (77.3) | <0.001 |
| Dyslipidemia | 3760 (51.8) | 585 (35.9) | 624 (44.0) | 658 (50.3) | 912 (59.3) | 374 (68.0) | 607 (74.4) | <0.001 |
| DM | 685 (9.4) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 685 (83.8) | <0.001 |
| CVD, n (％) | 689 (9.5) | 62 (3.8) | 68 (4.8) | 84 (6.4) | 137 (8.9) | 71 (12.9) | 267 (32.7) | <0.001 |
| Current smoking, n (％) | 2189 (30.3) | 523 (32.1) | 431 (30.5) | 401 (30.8) | 456 (29.7) | 161 (29.5) | 217 (27.2) | 0.22 |
| Medication, n (％) | ||||||||
| Antihypertensive drugs | 2009 (27.7) | 217 (13.3) | 294 (20.7) | 318 (24.3) | 480 (31.2) | 200 (36.4) | 500 (61.3) | <0.001 |
| Lipid-lowering drugs | 1116 (15.4) | 110 (6.8) | 134 (9.5) | 158 (12.1) | 238 (15.5) | 106 (19.3) | 370 (45.3) | <0.001 |
| Antidiabetic drugs | 489 (6.7) | 0 (0) | 0 (0) | 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.