Table 1.
Number of Patients with Inflammatory Bowel Disease and Dietary Intake in Japan.
| 1965 | 1970 | 1975 | 1980 | 1985 | 1990 | 1995 | 2000 | |
|---|---|---|---|---|---|---|---|---|
| Number of new cases | ||||||||
| Ulcerative colitis | 79 | 256 | 965 | 432 | 2490 | 2387 | 4264 | 6083 |
| Crohn’s disease | 3 | 12 | 82 | 122 | 656 | 894 | 1308 | 1615 |
| Number of patients | ||||||||
| Ulcerative colitis | 965 | 4405 | 11602 | 23200 | 41243 | 66714 | ||
| Crohn’s disease | 128* | 672 | 2831 | 6694 | 12645 | 19651 | ||
| Total population by census (million) | 98.3 | 103.7 | 111.9 | 117.1 | 121.0 | 123.6 | 125.6 | 127.0 |
| Estimated incidence per 100,000 | ||||||||
| Ulcerative colitis | 0.08 | 0.25 | 0.9 | 0.4 | 2.1 | 1.9 | 3.4 | 4.8 |
| Crohn’s disease | 0.003 | 0.01 | 0.07 | 0.1 | 0.5 | 0.7 | 1.0 | 1.3 |
| Food groups intake per capita/day | ||||||||
| Rice (g) | 350 | 306 | 248 | 226 | 216 | 198 | 168 | 160 |
| Wheat (g) | 60.4 | 64.8 | 90.2 | 91.8 | 91.3 | 84.8 | 93.7 | 94.3 |
| Potatoes (g) | 41.9 | 37.8 | 60.9 | 63.4 | 63.2 | 65.3 | 68.9 | 64.7 |
| Sugars (g) | 17.9 | 19.7 | 14.6 | 12.0 | 11.2 | 10.6 | 9.9 | 9.3 |
| Confectioneries (g) | 31.6 | 36.7 | 29.0 | 25.0 | 22.8 | 20.3 | 26.8 | 22.2 |
| Fats & oils (g) | 10.2 | 15.6 | 15.8 | 16.9 | 17.7 | 17.6 | 17.3 | 16.4 |
| Beans (g) | 69.6 | 71.2 | 70.0 | 65.4 | 66.6 | 68.5 | 70.0 | 70.2 |
| Fruits (g) | 58.8 | 81.0 | 193.5 | 155.2 | 140.6 | 124.8 | 133.0 | 117.4 |
| Vegetables & mushrooms (g) | 219.4 | 249.3 | 246.7 | 251.4 | 261.7 | 250.3 | 290.2 | 276.0 |
| Seaweeds (g) | 6.1 | 6.9 | 4.9 | 5.1 | 5.6 | 6.1 | 5.3 | 5.5 |
| Beverages (g) | 119.4 | 163.4 | 148.4 | 134.7 | 136.1 | 137.4 | 190.2 | 182.3 |
| Fishes & shellfishes (g) | 76.3 | 87.4 | 94.0 | 92.5 | 90.0 | 95.3 | 96.9 | 92.0 |
| Meats (g) | 29.5 | 42.5 | 64.2 | 67.9 | 71.7 | 71.2 | 82.3 | 78.2 |
| Eggs (g) | 35.2 | 41.2 | 41.5 | 37.7 | 40.3 | 42.3 | 42.1 | 39.7 |
| Milk & dairy products (g) | 57.4 | 78.8 | 103.5 | 115.2 | 116.7 | 130.1 | 144.4 | 127.6 |
| Energy (kcal) | 2184 | 2210 | 2188 | 2084 | 2088 | 2026 | 2042 | 1948 |
| Nutrient intake per capita/day | ||||||||
| Carbohydrate (g) | 384 | 368 | 337 | 313 | 298 | 287 | 280 | 266 |
| Protein (g) | 71.3 | 77.6 | 81.0 | 78.7 | 79.0 | 78.7 | 81.5 | 77.7 |
| Fat (g) | 36.0 | 46.5 | 52.0 | 52.4 | 56.9 | 56.9 | 59.9 | 57.4 |
| Dietary fiber (g) | 15.7 | 16.3 | 16.5 | 15.7 | 15.8 | 15.2 | 15.9 | 15.7 |
| Animal protein (g) | 28.5 | 34.2 | 38.9 | 39.2 | 40.1 | 41.0 | 43.9 | 41.7 |
| Animal fat (g) | 14.3 | 20.9 | 26.9 | 26.9 | 27.6 | 27.5 | 29.8 | 28.8 |
*The registration of Crohn’s disease started in 1976. The figure in 1976 is presented.