Table 2.
Baseline characteristics of the study population categorized by CMI quartiles.
| Total (n = 4944) | Q1 (n = 1236) | Q2 (n = 1236) | Q3 (n = 1236) | Q4 (n = 1236) | p | |
|---|---|---|---|---|---|---|
| Age (n (%)) | 0.01 | |||||
| 45–49 | 80 (1.6) | 19 (1.5) | 25 (2.0) | 21 (1.7) | 15 (1.2) | |
| 50–59 | 936 (18.9) | 231 (18.7) | 234 (18.9) | 225 (18.2) | 246 (19.9) | |
| 60–69 | 1790 (36.2) | 414 (33.5) | 446 (36.1) | 448 (36.2) | 482 (39.0) | |
| 70–79 | 1563 (31.6) | 394 (31.9) | 381 (30.8) | 406 (32.8) | 382 (30.9) | |
| ≥ 80 | 575 (11.6) | 178 (14.4) | 150 (12.1) | 136 (11.0) | 111 (9.0) | |
| Gender (n (%)) | < 0.001 | |||||
| Female | 2672 (54.0) | 561 (45.4) | 677 (54.8) | 701 (56.7) | 733 (59.3) | |
| Male | 2272 (46.0) | 675 (54.6) | 559 (45.2) | 535 (43.3) | 503 (40.7) | |
| Education (n (%)) | 0.772 | |||||
| Middle school and above | 1411 (28.5) | 341 (27.6) | 343 (27.8) | 363 (29.4) | 364 (29.4) | |
| Primary | 2104 (42.6) | 539 (43.6) | 534 (43.2) | 505 (40.9) | 526 (42.6) | |
| Illiterate | 1429 (28.9) | 356 (28.8) | 359 (29.0) | 368 (29.8) | 346 (28.0) | |
| Marital (n (%)) | 0.38 | |||||
| Married | 4408 (89.2) | 1095 (88.6) | 1103 (89.2) | 1097 (88.8) | 1113 (90.0) | |
| Divorced | 39 (0.8) | 12 (1.0) | 7 (0.6) | 8 (0.6) | 12 (1.0) | |
| Widowed | 467 (9.4) | 116 (9.4) | 121 (9.8) | 124 (10.0) | 106 (8.6) | |
| Unmarried | 30 (0.6) | 13 (1.1) | 5 (0.4) | 7 (0.6) | 5 (0.4) | |
| BMI (n (%)) | < 0.001 | |||||
| < 18.5 | 313 (6.3) | 163 (13.2) | 95 (7.7) | 35 (2.8) | 20 (1.6) | |
| 18.5–24 | 541 (10.9) | 25 (2.0) | 66 (5.3) | 160 (12.9) | 290 (23.5) | |
| 24–28 | 2670 (54.0) | 882 (71.4) | 751 (60.8) | 620 (50.2) | 417 (33.7) | |
| > 28 | 1420 (28.7) | 166 (13.4) | 324 (26.2) | 421 (34.1) | 509 (41.2) | |
| Smoking (n (%)) | < 0.001 | |||||
| Nonsmoker | 3018 (61.0) | 678 (54.9) | 755 (61.1) | 784 (63.4) | 801 (64.8) | |
| Ex-smoker | 413 (8.4) | 110 (8.9) | 98 (7.9) | 100 (8.1) | 105 (8.5) | |
| Smoker | 1513 (30.6) | 448 (36.2) | 383 (31.0) | 352 (28.5) | 330 (26.7) | |
| Drinking (n (%)) | < 0.001 | |||||
| Yes | 1621 (32.8) | 508 (41.1) | 401 (32.4) | 365 (29.5) | 347 (28.1) | |
| No | 3323 (67.2) | 728 (58.9) | 835 (67.6) | 871 (70.5) | 889 (71.9) | |
| TyG (median (IQR)) | 4.0 (3.7, 4.4) | 3.5 (3.3, 3.7) | 3.9 (3.7, 4.0) | 4.2 (4.0, 4.4) | 4.7 (4.5, 5.0) | < 0.001 |
| AIP (median (IQR)) | −0.1 (−0.6, 0.4) | −0.9 (−1.1, −0.7) | −0.3 (−0.5, −0.2) | 0.1 (0.0, 0.2) | 0.8 (0.5, 1.1) | < 0.001 |
| BUN (median (IQR)) | 15.1 (12.5, 18.1) | 16.0 (13.1, 19.2) | 15.0 (12.7, 18.2) | 14.7 (12.5, 17.6) | 14.5 (12.2, 17.2) | < 0.001 |
| Creatinine (median (IQR)) | 0.7 (0.6, 0.9) | 0.7 (0.6, 0.9) | 0.7 (0.6, 0.9) | 0.7 (0.6, 0.9) | 0.8 (0.7, 0.9) | 0.005 |
| HbA1c (median (IQR)) | 5.1 (4.9, 5.4) | 5.1 (4.8, 5.3) | 5.1 (4.9, 5.3) | 5.1 (4.8, 5.4) | 5.1 (4.9, 5.4) | < 0.001 |
| CRP (median (IQR)) | 1.0 (0.5, 2.0) | 0.8 (0.4, 1.6) | 0.8 (0.5, 1.8) | 1.0 (0.6, 2.0) | 1.3 (0.7, 2.5) | < 0.001 |
| Leucocytes (median (IQR)) | 5.9 (4.9, 7.2) | 5.6 (4.7, 6.7) | 5.8 (4.8, 7.1) | 6.0 (4.9, 7.2) | 6.3 (5.3, 7.6) | < 0.001 |
| Hypertension (n (%)) | < 0.001 | |||||
| Yes | 1917 (38.8) | 362 (29.3) | 410 (33.2) | 526 (42.6) | 619 (50.1) | |
| No | 3027 (61.2) | 874 (70.7) | 826 (66.8) | 710 (57.4) | 617 (49.9) | |
| Diabetes (n (%)) | < 0.001 | |||||
| Yes | 786 (15.9) | 136 (11.0) | 167 (13.5) | 199 (16.1) | 284 (23.0) | |
| No | 4158 (84.1) | 1100 (89.0) | 1069 (86.5) | 1037 (83.9) | 952 (77.0) | |
| Dyslipidemia (n (%)) | < 0.001 | |||||
| Yes | 1090 (22.0) | 109 (8.8) | 149 (12.1) | 190 (15.4) | 642 (51.9) | |
| No | 3854 (78.0) | 1127 (91.2) | 1087 (87.9) | 1046 (84.6) | 594 (48.1) | |
| CVD (n (%)) | < 0.001 | |||||
| Yes | 626 (12.7) | 133 (10.8) | 137 (11.1) | 161 (13.0) | 195 (15.8) | |
| No | 4318 (87.3) | 1103 (89.2) | 1099 (88.9) | 1075 (87.0) | 1041 (84.2) |