Table 1. Baseline characteristics of study participants stratified by quartiles of CTI.
| Characteristic |
Q1 (n =
1989) |
Q2 (n =
1989) |
Q3 (n =
1987) |
Q4 (n =
1989) |
p-value |
| Age,
years |
56.69 ±
8.98 |
57.93 ±
8.89 |
58.27 ±
8.86 |
58.42 ±
8.64 |
<0.0001 |
| Sex,
n (%) |
Male |
891 (44.8%) |
888 (44.6%) |
861 (43.3%) |
856 (43.0%) |
|
| Female |
1098
(55.2%) |
1101
(55.4%) |
1126
(56.7%) |
1133
(57.0%) |
|
| Residence,
n (%) |
Rural |
1452 (73.0%) |
1374 (69.1%) |
1322 (66.5%) |
1238 (62.2%) |
|
| Urban |
537
(27.0%) |
615
(30.9%) |
665
(33.5%) |
751
(37.8%) |
|
| Marital
status, n (%) |
Married |
1817 (91.4%) |
1801 (90.5%) |
1796 (90.4%) |
1789 (89.9%) |
|
| Other |
172
(8.6%) |
188
(9.5%) |
191
(9.6%) |
200
(10.1%) |
|
| Education
level, n (%) |
Below primary |
929 (46.7%) |
962 (48.4%) |
942 (47.4%) |
923 (46.4%) |
|
| Primary |
456
(22.9%) |
436
(21.9%) |
428
(21.5%) |
440
(22.1%) |
|
| Middle
school |
415 (20.9%) |
383 (19.3%) |
440 (22.1%) |
399 (20.1%) |
|
| High
school+ |
189
(9.5%) |
208
(10.5%) |
177
(8.9%) |
227
(11.4%) |
|
| Smoking
status, n (%) |
No |
1272 (64.0%) |
1253 (63.0%) |
1246 (62.7%) |
1272 (64.0%) |
|
| Yes |
717
(36.0%) |
736
(37.0%) |
741
(37.3%) |
717
(36.0%) |
|
| Drinking
status, n (%) |
No |
1236 (62.1%) |
1234 (62.0%) |
1251 (63.0%) |
1255 (63.1%) |
|
| Yes |
753
(37.9%) |
755
(38.0%) |
736
(37.0%) |
734
(36.9%) |
|
| Chronic
disease, n (%) |
No |
741 (37.3%) |
661 (33.2%) |
588 (29.6%) |
488 (24.5%) |
|
| Yes |
1248
(62.7%) |
1328
(66.8%) |
1399
(70.4%) |
1501
(75.5%) |
|
| Arthritis,
n (%) |
No |
1363 (68.5%) |
1280 (64.4%) |
1273 (64.1%) |
1268 (63.8%) |
|
| Yes |
626
(31.5%) |
709
(35.6%) |
714
(35.9%) |
721
(36.2%) |
|
| Liver
disease, n (%) |
No |
1909 (96.0%) |
1928 (96.9%) |
1927 (97.0%) |
1921 (96.6%) |
|
| Yes |
80
(4.0%) |
61
(3.1%) |
60
(3.0%) |
68
(3.4%) |
|
| Asthma,
n (%) |
No |
1954 (98.2%) |
1959 (98.5%) |
1956 (98.4%) |
1954 (98.2%) |
|
| Yes |
35
(1.8%) |
30
(1.5%) |
31
(1.6%) |
35
(1.8%) |
|
| Kidney
disease, n (%) |
No |
1912 (96.1%) |
1899 (95.5%) |
1897 (95.5%) |
1903 (95.7%) |
|
| Yes |
77
(3.9%) |
90
(4.5%) |
90
(4.5%) |
86
(4.3%) |
|
| Stomach
disease, n (%) |
No |
1851 (93.1%) |
1831 (92.0%) |
1816 (91.4%) |
1811 (91.0%) |
|
| Yes |
138
(6.9%) |
158
(8.0%) |
171
(8.6%) |
178
(9.0%) |
|
| Anti-diabetic
medication, n (%) |
No |
1788 (89.9%) |
1770 (89.0%) |
1760 (88.6%) |
1742 (87.6%) |
|
| Yes |
201(10.1%) |
219
(11.0%) |
227
(11.4%) |
247
(12.4%) |
|
| Anti-hypertensive
medication, n (%) |
No |
1611 (81.0%) |
1592 (80.0%) |
1572 (79.1%) |
1563 (78.6%) |
|
| Yes |
378
(19.0%) |
397
(20.0%) |
415
(20.9%) |
426
(21.4%) |
|
| Lipid-lowering
medication, n (%) |
No |
1711 (86.0%) |
1690 (85.0%) |
1679 (84.5%) |
1654 (83.2%) |
|
| Yes |
278
(14.0%) |
299
(15.0%) |
308
(15.5%) |
335
(16.8%) |
|
Continuous variables are shown as mean ± standard deviation (SD), and categorical variables as counts with percentages. P values were determined using analysis of variance (ANOVA) or the χ
2 test, as appropriate. CTI: C-reactive protein - triglyceride - glucose index.
