Table 2.
Baseline characteristic of the study population according to Mets-IR.
| Variables | Total (n = 4540) | Q1 (n = 1135) | Q2 (n = 1135) | Q3 (n = 1135) | Q4 (n = 1135) | P |
|---|---|---|---|---|---|---|
| Age | 57 (51, 64) | 55 (49, 61) | 57 (51, 62) | 57 (51, 63) | 61 (54, 68) | < 0.01 |
| Gender | < 0.01 | |||||
| Female | 2245 (49.45) | 564 (49.69) | 592 (52.16) | 590 (51.98) | 499 (43.96) | |
| Male | 2295 (50.55) | 571 (50.31) | 543 (47.84) | 545 (48.02) | 636 (56.04) | |
| Marital | < 0.01 | |||||
| Married | 4078 (89.82) | 1042 (91.81) | 1003 (88.37) | 1036 (91.28) | 997 (87.84) | |
| Non-Married | 462 (10.18) | 93 (8.19) | 132 (11.63) | 99 (8.72) | 138 (12.16) | |
| Education | 0.32 | |||||
| Elementary school and below | 3175 (69.93) | 767 (67.58) | 809 (71.28) | 795 (70.04) | 804 (70.84) | |
| High school | 926 (20.4) | 249 (21.94) | 211 (18.59) | 240 (21.15) | 226 (19.91) | |
| College and higher | 439 (9.67) | 119 (10.48) | 115 (10.13) | 100 (8.81) | 105 (9.25) | |
| Location | 0.39 | |||||
| Urban | 4288 (94.45) | 1081 (95.24) | 1075 (94.71) | 1063 (93.66) | 1069 (94.19) | |
| Rural | 252 (5.55) | 54 (4.76) | 60 (5.29) | 72 (6.34) | 66 (5.81) | |
| Smoking | < 0.01 | |||||
| Never | 2656 (58.5) | 630 (55.51) | 672 (59.21) | 693 (61.06) | 661 (58.24) | |
| Former smoker | 326 (7.18) | 65 (5.73) | 64 (5.64) | 81 (7.14) | 116 (10.22) | |
| Current smoker | 1558 (34.32) | 440 (38.77) | 399 (35.15) | 361 (31.81) | 358 (31.54) | |
| Drinking | 0.09 | |||||
| None of these | 2876 (63.35) | 714 (62.91) | 711 (62.64) | 719 (63.35) | 732 (64.49) | |
| Drink but less than once a month | 380 (8.37) | 108 (9.52) | 86 (7.58) | 110 (9.69) | 76 (6.7) | |
| Drink more than once a month | 1284 (28.28) | 313 (27.58) | 338 (29.78) | 306 (26.96) | 327 (28.81) | |
| Sleep time | 7 (5, 8) | 7 (5, 8) | 6 (5, 8) | 7 (5, 8) | 7 (5, 8) | 0.45 |
| Glucose (mg/dl) | 100.26 (93.06, 108.9) | 98.46 (91.26, 106.83) | 99.54 (92.7, 107.82) | 100.98 (93.78, 109.62) | 101.88(95.04,111.24) | < 0.01 |
| TG (mg/dl) | 89.39 (67.26, 118.59) | 79.65 (61.95, 111.51) | 88.5 (65.49, 122.13) | 92.93 (70.36, 123.01) | 95.58 (74.34, 115.93) | < 0.01 |
| HDL-C (mg/dl) | 53.35 (44.85, 63.02) | 56.44 (47.17, 67.27) | 55.28 (47.17, 65.34) | 52.19 (44.46, 62.24) | 48.71 (41.37, 57.99) | < 0.01 |
| LDL-C (mg/dl) | 113.66 (94.72, 134.54) | 110.18 (90.27, 129.7) | 112.11 (91.82, 132.22) | 114.82 (95.68, 136.86) | 118.3 (99.94, 138.79) | < 0.01 |
| Developed heart- disease | 0.01 | |||||
| No | 4218 (92.91) | 1077 (94.89) | 1053 (92.78) | 1050 (92.51) | 1038 (91.45) | |
| Yes | 322 (7.09) | 58 (5.11) | 82 (7.22) | 85 (7.49) | 97 (8.55) | |
| Developed stroke | < 0.01 | |||||
| No | 4337 (95.53) | 1108 (97.62) | 1091 (96.12) | 1080 (95.15) | 1058 (93.22) | |
| Yes | 203 (4.47) | 27 (2.38) | 44 (3.88) | 55 (4.85) | 77 (6.78) | |
| Developed CVD | < 0.01 | |||||
| No | 4046 (89.12) | 1052 (92.69) | 1013 (89.25) | 1005 (88.55) | 976 (85.99) | |
| Yes | 494 (10.88) | 83 (7.31) | 122 (10.75) | 130 (11.45) | 159 (14.01) | |
| Mets-IR | 31.89 (28.53, 35.78) | 27.85 (25.46, 30.19) | 30.52 (28.14, 33.23) | 33.2 (30.76, 35.95) | 37.1 (33.75, 40.53) | < 0.01 |
p-Values were calculated from chi-square tests (categorical variables) or rank-sum tests (continuous variables without normal distribution), or anova (continuous variables with normal distribution).
CVD, Cardiovascular disease; METS-IR, Metabolic Score for Insulin Resistance; TG, Triglyceride; HDL-C, High-density lipoprotein cholesterol; LDL-C, Low-density lipoprotein cholesterol.