Table I.
Population characteristics in combined and individual Chinese population studies
| Linxian Nutrition Intervention Trial | Shanxi UGI Cancer Genetics Project | Combined population | ||||
|---|---|---|---|---|---|---|
| Abbreviation | NIT | Shanxi | ||||
| Location | Henan Province, People’s Republic of China | Shanxi Province, People’s Republic of China | ||||
| Matching | Sex and age (10 year groups) | Sex and age (±5 years) | ||||
| Controls (n = 410) | Cases (n = 480) | Controls (n = 1042) | Cases (n = 546) | Controls (n = 1452) | Cases (n = 1026) | |
| Age (years) | 63.6±7.6 | 64.3±7.0 | 58.3±8.7 | 57.4.3±8.2 | 59.7±8.7 | 60.6±8.4 |
| %Male | 45% | 45% | 72% | 63% | 64% | 55% |
| % Smoking, yes | 31% | 28% | 64% | 58% | 55% | 44% |
| % Alcohol, yes | 25% | 23% | 50% | 47% | 43% | 36% |
| % Family History, UGI Cancer, yes | 32% | 37% | 20% | 25% | 24% | 31% |