Table 1 General characteristics of the study population
variables | Case (%) n = 409 | Control (%) n = 1275 | χ2 | P |
|---|---|---|---|---|
Sex |  |  | 36.067 | < 0.001 |
Male | 292(71.39) | 696(54.59) | Â | Â |
Female | 117(28.61) | 579(45.41) | Â | Â |
Age |  |  | 888.442 | < 0.001 |
≤ 45 | 22(5.38) | 788(61.80) |  |  |
46–59 | 92(22.49) | 428(33.57) |  |  |
≥ 60 | 295(72.13) | 59(4.63) |  |  |
Marital status |  |  | 108.483 | < 0.001 |
Unmarried | 4(0.98) | 220(17.25) | Â | Â |
Married | 379(92.67) | 1044(81.88) | Â | Â |
Other | 26(6.36) | 11(0.86) | Â | Â |
Education level |  |  | 607.532 | < 0.001 |
Primary and below | 220(53.79) | 76(5.96) | Â | Â |
Junior/Senior High School | 159(38.88) | 385(30.20) | Â | Â |
College and above | 30(7.33) | 814(63.84) | Â | Â |
Income |  |  | 139.641 | < 0.001 |
< 5000 | 92(22.49) | 71(5.57) |  |  |
5000–10,000 | 156(38.14) | 358(28.08) |  |  |
> 10,000 | 161(39.36) | 846(66.35) |  |  |
BMI(kg/m2) |  |  | 16.151 | < 0.001 |
< 18.5 | 43(10.51) | 77(6.04) |  |  |
18.5–23.9 | 255(62.35) | 744(58.35) |  |  |
≥ 24 | 111(27.14) | 454(35.61) |  |  |
Smoke |  |  | 52.429 | < 0.001 |
Yes | 199(48.66) | 372(29.18) | Â | Â |
No | 210(51.34) | 903(70.82) | Â | Â |
Drink |  |  | 32.516 | < 0.001 |
Yes | 112(27.38) | 551(43.22) | Â | Â |
No | 297(72.62) | 724(56.78) | Â | Â |
Drinking tea |  |  | 77.620 | < 0.001 |
Yes | 143(34.96) | 764(59.92) | Â | Â |
No | 266(65.04) | 511(40.08) | Â | Â |
Taste |  |  | 62.009 | < 0.001 |
Insipid | 60(14.67) | 430(33.73) | Â | Â |
Normal | 187(45.72) | 521(40.86) | Â | Â |
Salty | 162(39.61) | 324(25.41) | Â | Â |
mealtime | Â | Â | 3.694 | 0.158 |
Quick | 153(37.41) | 447(35.06) | Â | Â |
Normal | 219(53.55) | 741(58.12) | Â | Â |
Slow | 37(9.05) | 87(6.82) | Â | Â |
History of diabetes |  |  | 108.495 | < 0.001 |
Yes | 64(15.65) | 28(2.20) | Â | Â |
No | 345(84.35) | 1247(97.80) | Â | Â |
History of hypertension |  |  | 149.416 | < 0.001 |
Yes | 113(27.63) | 74(5.80) | Â | Â |
No | 296(72.37) | 1201(94.20) | Â | Â |