Table 1.
Baseline characteristics of tertiles of the DII score, Mean ± SD or N (%).
| Variables | Dietary Inflammatory Index | |||
|---|---|---|---|---|
| Tertile 1 | Tertile 2 | Tertile 3 | p a | |
| N | 566 | 567 | 579 | |
| DII scores | −0.91(0.74) | 0.62(0.30) | 1.63(0.38) | |
| Age | 53.8(15.7) | 51.5(17.6) | 46.2(18.0) | <0.001 * |
| BMI (kg/m2) | 24.0(3.6) | 23.8(3.4) | 23.6(3.6) | 0.157 |
| Gender | 0.047 * | |||
| Male | 173(30.6) | 192(33.9) | 217(37.5) | |
| Female | 393(69.4) | 375(66.1) | 362(62.5) | |
| Education | 0.218 | |||
| Never | 28(4.9) | 16(2.8) | 30(5.2) | |
| Secondary or under | 155(27.4) | 176(31.2) | 160(27.8) | |
| high or equal | 242(42.8) | 238(42.1) | 222(38.6) | |
| Bachelor | 118(20.8) | 108(19.1) | 136(23.7) | |
| Master or above | 23(4.1) | 27(4.8) | 27(4.7) | |
| Family monthly income (RMB: yuan) | 0.105 | |||
| ≤3000 | 113(20.1) | 114(20.2) | 134(23.3) | |
| 3000–4999 | 144(25.6) | 169(30.0) | 176(30.6) | |
| 5000–7999 | 138(24.5) | 106(18.8) | 122(21.2) | |
| 8000–9999 | 61(10.8) | 54(9.6) | 57 (9.9) | |
| 10,000–14,999 | 58 (10.3) | 66(11.7) | 48(8.3) | |
| ≥15,000 | 49(8.7) | 55(9.8) | 39(6.8) | |
| Family monthly expenditure on food (RMB: yuan) | <0.001 * | |||
| ≤500 | 30(5.3) | 36(6.4) | 52(9.0) | |
| 500–999 | 112(19.8) | 138(24.4) | 143(24.8) | |
| 1000–2999 | 288(50.9) | 288(50.9) | 302(52.3) | |
| 3000–4999 | 104(18.4) | 68(12.0) | 65(11.3) | |
| ≥5000 | 32(5.7) | 36(6.4) | 15(2.6) | |
| City | 0.002 * | |||
| Beijing | 120(21.2) | 105(18.5) | 101(17.4) | |
| Chengdu | 53(9.4) | 51(9.0) | 64(11.1) | |
| Chenzhou | 57(10.1) | 45(7.9) | 71(12.3) | |
| Jilin | 33(5.8) | 69(12.2) | 63(10.9) | |
| Guangzhou | 122(21.6) | 107(18.9) | 97(16.8) | |
| Lanzhou | 64(11.3) | 60(10.6) | 51(8.8) | |
| Wuhu | 59(10.4) | 58(10.2) | 79(13.6) | |
| Xuchang | 58(10.3) | 72(12.7) | 53(9.2) | |
| Geographic location | 0.029 * | |||
| South | 291(51.4) | 261(46.0) | 311(53.7) | |
| North | 275(48.6) | 306(54.0) | 268(46.3) | |
| Physical activity | 0.499 | |||
| Low | 109(20.3) | 100(19.3) | 119(21.5) | |
| Medium | 301(56.2) | 291(56.3) | 286(51.6) | |
| High | 126(23.5) | 126(24.4) | 149(26.9) | |
| Smoking status | 0.102 | |||
| Non-smoker | 436(77.7) | 431(76.6) | 431(74.7) | |
| Former smoker | 68(12.1) | 52(9.2) | 62(10.8) | |
| Smoker | 57(10.2) | 80(14.2) | 84(14.6) | |
DII: dietary inflammatory index, SD: standard deviation, BMI: body mass index, RMB: RenMinbi. a Age and BMI were continuous variables, and they were analyzed with one-way ANOVA test; Other variables were analyzed with chi-square analysis. * Significant p values that met the 5% level.