Table 1 Demographic characteristics of study participants
|  | Control (n = 233) | Case (n = 233) | χ2 | p-value |
|---|---|---|---|---|
Gender | Â | Â | 0.000 | 1.00 |
 Female | 63 | 63 |  |  |
 Male | 170 | 170 |  |  |
Age | Â | Â | 0.424 | 0.515 |
 ≤65y | 123 | 130 |  |  |
 >65y | 110 | 103 |  |  |
Smoking status | Â | Â | 0.009 | 0.926 |
 No | 109 | 108 |  |  |
 Yes | 124 | 125 |  |  |
Alcohol consumption | Â | Â | 1.378 | 0.240 |
 No | 194 | 203 |  |  |
 Yes | 39 | 30 |  |  |
Pickled vegetable intake | Â | Â | 17.003 | <0.001 |
 No | 66 | 30 |  |  |
 Yes | 167 | 203 |  |  |
H. pylori infection | Â | Â | 0.567 | 0.451 |
 No | 141 | 133 |  |  |
 Yes | 92 | 100 |  |  |