| 2–5 years old | 2–20 years old | ||||
---|---|---|---|---|---|---|
 | Cases | Controls |  | Cases | Controls |  |
Consumption of food | (n = 50) | (n = 118) | OR (95% CI)a | (n = 145) | (n = 370) | OR (95% CI)a |
Cured meat/fish | Â | Â | Â | Â | Â | Â |
   Rare or occasional | 34 | 90 | 1.00 | 94 | 282 | 1.00 |
   Frequent | 16 | 28 | 1.52 (0.75–3.09) | 51 | 88 | 1.74 (1.15–2.64) c |
Pickled vegetables | Â | Â | Â | Â | Â | Â |
   Rare or occasional | 44 | 103 | 1.00 | 124 | 322 | 1.00 |
   Frequent | 6 | 15 | 1.07 (0.41–2.79) | 20 | 48 | 1.10 (0.62–1.93) |
Bean-curd food | Â | Â | Â | Â | Â | Â |
   Rare or occasional | 17 | 21 | 1.00 | 34 | 53 | 1.00 |
   Frequent | 33 | 97 | 0.47 (0.22–0.99) b | 111 | 317 | 0.55 (0.34–0.89) b |
Vegetables | Â | Â | Â | Â | Â | Â |
   Rare or occasional | 27 | 39 | 1.00 | 57 | 97 | 1.00 |
   Frequent | 23 | 79 | 0.44 (0.22–0.85) b | 88 | 273 | 0.55 (0.37–0.83) c |
Fruits | Â | Â | Â | Â | Â | Â |
   Rare or occasional | 29 | 46 | 1.00 | 75 | 178 | 1.00 |
   Frequent | 21 | 72 | 0.53 (0.28–1.01) | 70 | 192 | 0.86 (0.58–1.26) |
Tea | Â | Â | Â | Â | Â | Â |
   No | 34 | 80 | 1.00 | 100 | 237 | 1.00 |
   Yes | 16 | 38 | 0.98 (0.49–1.95) | 45 | 133 | 0.80 (0.53–1.22) |