Demographic data of responders
| Number (%) of individuals | |
|---|---|
| Female | 2179 (56) |
| H pylori positive | 1048 (27) |
| Married | 3621 (93) |
| Smokers | 843 (22) |
| Alcohol drinkers | 3536 (91) |
| Coffee drinkers | 3336 (86) |
| Caucasian | 3757 (97) |
| Social class | |
| I and II | 1500 (39) |
| III | 1640 (42) |
| IV and V | 391 (10) |
| Body mass index | |
| Normal | 1547 (40) |
| Overweight | 1448 (37) |
| Obese | 776 (20) |