Table 1 Baseline characteristics of the case-cohort study population
Variable | Sub-cohort (n = 77) | Case (n = 77) | Total (n = 154) | P value |
|---|---|---|---|---|
Demographic | Â | Â | Â | Â |
Age (years) | 57.7 (7.6) | 59.8 (6.4) | 58.7 (7.1) | 0.068 |
Female, n (%) | 29 (37.7) | 18 (23.4) | 47 (30.5) | 0.080 |
BMI (kg/m2) | 24.1 (2.9) | 23.5 (3.3) | 23.8 (3.1) | 0.228 |
Education, n (%) | Â | Â | Â | 0.380 |
 Lack of education | 10 (13.0) | 10 (13.0) | 20 (13.0) |  |
 Primary | 18 (23.4) | 27 (35.1) | 45 (29.2) |  |
 Junior | 41 (53.2) | 31 (40.3) | 72 (46.8) |  |
 Senior | 8 (10.4) | 8 (10.4) | 16 (10.4) |  |
 College or above | 0 (0.0) | 1 (1.3) | 1 (0.6) |  |
Married, n (%) | 75 (97.4) | 72 (93.5) | 147 (95.5) | 0.155 |
No. of family members, n (%) | Â | Â | Â | 0.701 |
 1 | 2 (2.6) | 4 (5.2) | 6 (3.9) |  |
 2 | 27 (35.1) | 27 (35.1) | 54 (35.1) |  |
 ≥ 3 | 48 (62.3) | 46 (59.7) | 94 (61.0) |  |
Family medical history, n (%) | 12 (15.6) | 14 (18.2) | 26 (16.9) | 0.827 |
Lifestyle | Â | Â | Â | Â |
Smokers, n (%) | 21 (27.3) | 27 (35.1) | 48 (31.2) | 0.380 |
Alcohol drinkers, n (%) | 23 (29.9) | 28 (36.4) | 51 (33.1) | 0.490 |
Tea drinkers, n (%) | 50 (64.9) | 50 (64.9) | 100 (64.9) | 1.000 |
Dairy intake, n (%) | Â | Â | Â | 0.779 |
 Never/rarely | 0 (0.0) | 0 (0.0) | 0 (0.0) |  |
 Sometimes | 8 (10.4) | 6 (7.8) | 14 (9.1) |  |
 Usually | 69 (89.6) | 71 (92.2) | 140 (90.9) |  |
Beans intake, n (%) | Â | Â | Â | 0.141 |
 Never/rarely | 0 (0.0) | 0 (0.0) | 0 (0.0) |  |
 Sometimes | 37 (48.1) | 27 (35.1) | 64 (41.6) |  |
 Usually | 40 (51.9) | 50 (64.9) | 90 (58.4) |  |
Salted food intake, n (%) | Â | Â | Â | 0.873 |
 Never/rarely | 2 (2.6) | 2 (2.6) | 4 (2.6) |  |
 Sometimes | 52 (67.5) | 49 (63.6) | 101 (65.6) |  |
 Usually | 23 (29.9) | 26 (33.8) | 49 (31.8) |  |
Fried food intake, n (%) | Â | Â | Â | 0.970 |
 Never/rarely | 1 (1.3) | 1 (1.3) | 2 (1.3) |  |
 Sometimes | 66 (85.7) | 67 (87.0) | 133 (86.4) |  |
 Usually | 10 (13.0) | 9 (11.7) | 19 (12.3) |  |
Hot food intake, n (%) | Â | Â | Â | 0.076 |
 Never/rarely | 44 (57.1) | 30 (39.0) | 74 (48.1) |  |
 Sometimes | 17 (22.1) | 23 (29.9) | 40 (26.0) |  |
 Usually | 16 (20.8) | 24 (31.2) | 40 (26.0) |  |