Table 1.
Baseline characteristics of patients with gastric cancer (NCGC and CGC) and subcohort participants
| NCGC (n=499) | CGC (n=436) | Subcohort (n=500) | ||
|---|---|---|---|---|
| Demographic factors | ||||
| Age (years) | 59·0 (9·5) | 61·2 (8·6) | 59·1 (9·9) | |
| Sex | ||||
| Men | 327 (66%) | 325 (75%) | 347 (69%) | |
| Women | 172 (34%) | 111 (25%) | 153 (31%) | |
| Urban residents | 351 (70%) | 159 (36%) | 252 (50%) | |
| ≥6 years of education | 225 (45%) | 141 (32%) | 217 (43%) | |
| Household income (>¥20 000 per year) | 231 (46%) | 132 (30%) | 210 (42%) | |
| Lifestyle factors | ||||
| Current regular smoking | ||||
| Men | 230 (70%) | 186 (57%) | 202 (58%) | |
| Women | 5 (3%) | 0 | 6 (4%) | |
| Current regular alcohol drinking | ||||
| Men | 134 (41%) | 89 (27%) | 111 (32%) | |
| Women | 2 (1%) | 0 | 7 (5%) | |
| Physical activity (MET-h per day) | 19·5 (15·2) | 18·1 (15·5) | 17·9 (14·0) | |
| Medical history and health status | ||||
| Poor self-rated health at baseline | 46 (9%) | 53 (12%) | 55 (11%) | |
| Diabetes (self-reported or screen detected) | 32 (6%) | 25 (6%) | 44 (9%) | |
| A history of peptic ulcer | 31 (6%) | 23 (5%) | 27 (5%) | |
| A history of cirrhosis or chronic hepatitis | 3 (1%) | 3 (1%) | 6 (1%) | |
| A history of CHD, stroke, or TIA | 28 (6%) | 31 (7%) | 52 (10%) | |
| A history of emphysema or bronchitis | 12 (2%) | 18 (4%) | 21 (4%) | |
| Anthropometry and blood pressure | ||||
| Body mass index (kg/m2) | 23·6 (3·4) | 24·0 (3·5) | 23·7 (3·5) | |
| Underweight (<18·5 kg/m2) | 25 (5%) | 14 (3%) | 26 (5%) | |
| Normal (18·5–24·9 kg/m2) | 314 (63%) | 266 (61%) | 301 (60%) | |
| Overweight (25·0–29·9 kg/m2) | 136 (27%) | 135 (31%) | 150 (30%) | |
| Obese (≥30 kg/m2) | 24 (5%) | 21 (5%) | 23 (5%) | |
| Waist circumference (cm) | 81·1 (10·1) | 82·3 (10·2) | 81·4 (10·3) | |
| SBP (mm Hg) | 135·3 (22·8) | 138·0 (23·1) | 135·8 (22·5) | |
| Daily dietary consumption | ||||
| Rice | 337 (68%) | 183 (42%) | 358 (72%) | |
| Wheat | 221 (44%) | 271 (62%) | 188 (38%) | |
| Meat | 174 (35%) | 69 (16%) | 150 (30%) | |
| Poultry | 6 (1%) | 0 | 2 (0%) | |
| Dairy | 86 (17%) | 41 (9.4) | 64 (12.8) | |
| Fresh vegetables | 474 (95%) | 424 (97%) | 481 (96%) | |
| Soybean | 24 (5%) | 14 (3%) | 18 (4%) | |
| Preserved vegetables | 160 (32%) | 105 (24%) | 86 (17%) | |
| Fresh fruit | 125 (25%) | 32 (7%) | 97 (19%) | |
| Spicy food | 86 (17%) | 41 (9%) | 122 (24%) | |
Data are mean (SD) or number (%). CGC=cardia gastric cancer. CHD=coronary heart disease. MET-h=metabolic equivalent of task-hours. NCGC=non-cardia gastric cancer. SBP=systolic blood pressure. TIA=transient ischaemic attack.