Table 1.
Baseline characteristics of the study population grouped by IR.
| Factor | missing (%) | IR | Non-IR | P |
|---|---|---|---|---|
| N | 1908 | 5725 | ||
| Age, year | 51.00 (19.00) | 48.00 (22.00) | <0.01 | |
| Gender | <0.01 | |||
| Male | 981 (51.42%) | 2545 (44.45%) | ||
| Female | 927 (48.58%) | 3180 (55.55%) | ||
| Province | <0.01 | |||
| Liaoning | 232 (12.16%) | 472 (8.24%) | ||
| Heilongjiang | 198 (10.38%) | 605 (10.57%) | ||
| Jiangsu | 215 (11.27%) | 771 (13.47%) | ||
| Shandong | 173 (9.07%) | 609 (10.64%) | ||
| Henan | 198 (10.38%) | 654 (11.42%) | ||
| Hubei | 206 (10.80%) | 613 (10.71%) | ||
| Hunan | 324 (16.98%) | 664 (11.60%) | ||
| Guangxi | 183 (9.59%) | 818 (14.29%) | ||
| Guizhou | 179 (9.38%) | 519 (9.07%) | ||
| Educational level | 10(0.13%) | 0.25 | ||
| None | 418 (21.91%) | 1323 (23.15%) | ||
| Primary school | 374 (19.60%) | 1095 (19.16%) | ||
| Lower middle school | 617 (32.34%) | 1957 (34.24%) | ||
| Upper middle school | 244 (12.79%) | 665 (11.64%) | ||
| Technical or vocational school | 150 (7.86%) | 394 (6.89%) | ||
| University or college | 105 (5.50%) | 279 (4.88%) | ||
| Master or higher | 0 (0.00%) | 2 (0.03%) | ||
| Height, cm | 97(1.27%) | 161.80 (13.20) | 160.40 (12.00) | <0.01 |
| Weight, kg | 131(1.72%) | 64.50 (15.30) | 57.60 (13.70) | <0.01 |
| SBP, mmHg | 84(1.10%) | 124.00 (24.00) | 120.00 (20.00) | <0.01 |
| DBP, mmHg | 85(1.11%) | 80.00 (14.00) | 80.00 (16.00) | <0.01 |
| BMI, kg/m2 | 140(1.83%) | 24.60 (4.45) | 22.27 (4.19) | <0.01 |
| Total calorie intake, kcal | 2096.83 (820.51) | 2076.05 (836.01) | 0.72 | |
| Current smoker | 212(2.78%) | 593 (32.05%) | 1537 (27.59%) | <0.01 |
| Current drinker | 49(0.64%) | 467 (24.60%) | 1091 (19.19%) | <0.01 |
| Hypertension | 9(0.12%) | 327 (17.16%) | 512 (8.95%) | <0.01 |
| Stroke | 6(0.08%) | 30 (1.57%) | 57 (1.00%) | 0.04 |
| MI | 6(0.08%) | 22 (1.15%) | 39 (0.68%) | 0.05 |
| Urea, mmol/L | 5.38 (1.83) | 5.21 (1.96) | <0.01 | |
| Uric acid, mg/dL | 348.00 (129.00) | 274.00 (109.00) | <0.01 | |
| Apo A1, g/L | 1.07 (0.35) | 1.11 (0.34) | <0.01 | |
| Apo B, g/L | 1.02 (0.36) | 0.82 (0.31) | <0.01 | |
| Lp(a), mg/dL | 69.00 (111.00) | 83.00 (133.00) | <0.01 | |
| Creatinine, μmol/L | 87.00 (20.00) | 83.00 (20.00) | <0.01 | |
| HDL-c, mmol/L | 1.19 (0.40) | 1.46 (0.46) | <0.01 | |
| LDL-c, mmol/L | 1(0.01%) | 2.98 (1.33) | 2.85 (1.11) | <0.01 |
| Magnesium, mmol/L | 0.95 (0.11) | 0.93 (0.10) | <0.01 | |
| Ferritin, ng/mL | 5(0.07%) | 108.84 (138.14) | 67.75 (90.47) | <0.01 |
| Insulin, uIU/mL | 12(0.16%) | 12.92 (10.30) | 9.43 (6.24) | <0.01 |
| WBC, 10^9/L | 16(0.21%) | 6.30 (2.12) | 5.90 (2.06) | <0.01 |
| RBC, 10^12/L | 54(0.71%) | 4.73 (0.77) | 4.60 (0.77) | <0.01 |
| Platelet, 10^9/L | 21(0.28%) | 213.00 (84.00) | 211.00 (84.00) | 0.38 |
| Hemoglobin, g/L | 145.00 (25.00) | 139.00 (25.00) | <0.01 | |
| HbA1c, % | 5.50 (0.50) | 5.40 (0.50) | <0.01 | |
| TP, g/L | 77.30 (7.10) | 77.00 (6.60) | 0.01 | |
| Albumin, g/L | 48.00 (4.15) | 47.00 (4.20) | <0.01 | |
| Glucose, mmol/L | 5.39 (0.83) | 4.94 (0.72) | <0.01 | |
| Triglycerides, mmol/L | 2.59 (1.19) | 1.01 (0.58) | <0.01 | |
| TC, mmol/L | 5.17 (1.35) | 4.59 (1.20) | <0.01 | |
| ALT, U/L | 1(0.01%) | 23.00 (17.00) | 17.00 (11.00) | <0.01 |
| Transferrin, g/L | 5(0.07%) | 295.00 (69.00) | 277.00 (66.00) | <0.01 |
| TyG index | 4.99 (0.25) | 4.49 (0.31) | <0.01 | |
SBP, systolic pressure; DBP, diastolic pressure; BMI, body mass index; MI, myocardial infarction; Apo A1, apolipoprotein A1; Apo B, apolipoprotein B; Lp(a), lipoprotein (a); HDL-c, high-density lipoprotein cholesterol; LDL-c, low-density lipoprotein cholesterol; WBC, white blood cell; RBC, red blood cell; TC, total cholesterol; ALT, alanine aminotransferase.