Table 1 Baseline characteristics of participants stratified by quartiles of TyG index
Characteristics | Overall | Quartiles of TyG index | ||||
|---|---|---|---|---|---|---|
|  |  | Q1 (≤ 8.22) | Q2 (> 8.22 to 8.59) | Q3 (> 8.59 to 9.03) | Q4 (> 9.03) | P value |
n | 7970 | 1992 | 1993 | 1993 | 1992 | Â |
TyG index | 8.67 ± 0.66 | 7.94 ± 0.25 | 8.41 ± 0.10 | 8.79 ± 0.13 | 9.55 ± 0.51 | < 0.001 |
Age, years | 58.29 ± 8.76 | 58.31 ± 9.11 | 58.23 ± 8.76 | 58.70 ± 8.66 | 57.90 ± 8.47 | 0.037 |
Female, n (%) | 4331 (54.3) | 921 (46.2) | 1079 (54.1) | 1168 (58.6) | 1163 (58.4) | < 0.001 |
SBP&, mmHg | 128.53 ± 20.92 | 124.79 ± 20.66 | 127.26 ± 20.43 | 130.01 ± 21.29 | 132.17 ± 20.57 | < 0.001 |
DBP&, mmHg | 75.00 ± 12.07 | 72.79 ± 11.96 | 74.34 ± 11.86 | 75.68 ± 12.11 | 77.26 ± 11.90 | < 0.001 |
Heart rate&, rpm | 71.94 ± 10.30 | 70.42 ± 10.06 | 71.49 ± 10.08 | 72.41 ± 10.37 | 73.50 ± 10.45 | < 0.001 |
BMI&, kg/m2 | 23.46 ± 3.58 | 22.08 ± 3.10 | 22.93 ± 3.40 | 23.87 ± 3.61 | 25.01 ± 3.52 | < 0.001 |
Rural residence, n (%) | 5355 (67.2) | 1421 (71.3) | 1392 (69.8) | 1308 (65.6) | 1234 (61.9) | < 0.001 |
Region*, n (%) | Â | Â | Â | Â | Â | 0.019 |
North | 3658 (45.9) | 862 (43.3) | 912 (45.8) | 924 (46.4) | 960 (48.2) | Â |
South | 4312 (54.1) | 1130 (56.7) | 1081 (54.2) | 1069 (53.6) | 1032 (51.8) | Â |
Education, n (%) | Â | Â | Â | Â | Â | 0.926 |
Junior high school and below | 7232 (90.7) | 1811 (90.9) | 1817 (91.2) | 1805 (90.6) | 1799 (90.3) | Â |
Senior high school | 670 (8.4) | 165 (8.3) | 161 (8.1) | 172 (8.6) | 172 (8.6) | Â |
Tertiary | 68 (0.9) | 16 (0.8) | 15 (0.8) | 16 (0.8) | 21 (1.1) | Â |
Marital status, n (%) | Â | Â | Â | Â | Â | 0.101 |
Married and living with spouse | 6767 (84.9) | 1671 (83.9) | 1682 (84.4) | 1690 (84.8) | 1724 (86.5) | Â |
Others | 1203 (15.1) | 321 (16.1) | 311 (15.6) | 303 (15.2) | 268 (13.5) | Â |
Alcohol consumption, n (%) |  |  |  |  |  | < 0.001 |
Never | 4689 (58.8) | 1090 (54.7) | 1148 (57.6) | 1242 (62.3) | 1209 (60.7) | Â |
Former | 630 (7.9) | 136 (6.8) | 186 (9.3) | 168 (8.4) | 140 (7.0) | Â |
Current | 2651 (33.3) | 766 (38.5) | 659 (33.1) | 583 (29.3) | 643 (32.3) | Â |
Smoking status, n (%) |  |  |  |  |  | < 0.001 |
Never | 5049 (63.4) | 1157 (58.1) | 1261 (63.3) | 1311 (65.8) | 1320 (66.3) | Â |
Former | 623 (7.8) | 159 (8.0) | 142 (7.1) | 161 (8.1) | 161 (8.1) | Â |
Current | 2298 (28.8) | 676 (33.9) | 590 (29.6) | 521 (26.1) | 511 (25.7) | Â |
Hemoglobin, g/dL | 14.41 ± 2.21 | 14.23 ± 2.28 | 14.36 ± 2.22 | 14.37 ± 2.13 | 14.68 ± 2.18 | < 0.001 |
FBG, mg/dL | 108.42 ± 33.42 | 95.15 ± 14.17 | 100.94 ± 13.95 | 105.87 ± 17.20 | 131.71 ± 54.74 | < 0.001 |
HbA1c&, % | 5.24 ± 0.76 | 5.07 ± 0.44 | 5.13 ± 0.49 | 5.18 ± 0.53 | 5.57 ± 1.21 | < 0.001 |
TC, mg/dL | 193.55 ± 38.66 | 179.46 ± 33.35 | 190.52 ± 33.86 | 196.02 ± 36.83 | 208.19 ± 44.01 | < 0.001 |
TG, mg/dL | 132.88 ± 108.03 | 61.11 ± 13.82 | 90.69 ± 14.61 | 127.92 ± 22.04 | 251.84 ± 157.17 | < 0.001 |
HDL, mg/dL | 51.32 ± 15.43 | 60.55 ± 15.11 | 54.78 ± 14.16 | 49.00 ± 13.13 | 40.93 ± 11.86 | < 0.001 |
LDL&, mg/dL | 116.65 ± 34.75 | 108.96 ± 29.14 | 119.86 ± 31.14 | 123.24 ± 33.88 | 114.51 ± 41.85 | < 0.001 |
BUN&, mg/dL | 15.74 ± 4.47 | 16.38 ± 4.76 | 15.67 ± 4.39 | 15.37 ± 4.24 | 15.52 ± 4.39 | < 0.001 |
UA, mg/dL | 4.40 ± 1.21 | 4.22 ± 1.12 | 4.27 ± 1.16 | 4.45 ± 1.19 | 4.69 ± 1.30 | < 0.001 |
Serum creatinine&, mg/dL | 0.77 ± 0.18 | 0.77 ± 0.18 | 0.76 ± 0.17 | 0.78 ± 0.18 | 0.79 ± 0.19 | < 0.001 |
Hypertension, n (%) | 3738 (46.9) | 750 (37.7) | 867 (43.5) | 982 (49.3) | 1139 (57.18) | < 0.001 |
Kidney disease&, n (%) | 445 (5.6) | 120 (6.0) | 124 (6.2) | 105 (5.3) | 96 (4.8) | 0.181 |
Stroke, n (%) | 110 (1.4) | 27 (1.4) | 33 (1.7) | 28 (1.4) | 22 (1.1) | 0.524 |
Heart disease, n (%) | 752 (9.4) | 165 (8.3) | 178 (8.9) | 207 (10.4) | 202 (10.1) | 0.073 |
DM, n (%) | 364 (4.6) | 32 (1.6) | 50 (2.5) | 75 (3.8) | 207 (10.4) | < 0.001 |