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Table 1 Number of subjects and SMR1 of colon cancer and rectal cancer in 23 Prefectures, from northeastern to southwestern in order.

From: Dietary fiber showed no preventive effect against colon and rectal cancers in Japanese with low fat intake: an analysis from the results of nutrition surveys from 23 Japanese prefectures

Prefecture No. of Survey year Col SMR Rec SMR
  Subjects    
Hokkaido 950 1989 108.0 104.9
Aomori 1631 1991 118.9 119.7
Miyagi 162 1989 89.8 109.8
Akita 1254 1987 118.1 107.8
Yamagata 1698 1990 113.0 97.9
Fukushima 632 1990 96.4 107.0
Gunma 928 1990 88.9 87.2
Tokyo 1319 1991 116.1 109.9
Toyama 957 1990 101.4 84.9
Nagano 3057 1989 91.8 88.4
Yamanashi 1642 1989 72.8 100.2
Niigata 2290 1989 97.7 109.3
Fukui 212 1987 78.4 70.0
Ishikawa 849 1987 102. 79.8
Shizuoka 1367 1989 82.7 97.8
Aichi 484 1991 104.9 103.9
Mie 700 1988 81.6 89.1
Kyoto 1523 1987 107.8 95.2
Hyogo 500 1988 103.8 97.8
Yamaguchi 1579 1990 93.8 100.5
Kochi 1211 1990 78.0 106.2
Fukuoka 1532 1989 108.4 98.0
Saga 1624 1989 92.3 93.3
  1. 1: Standardized mortality rate Col SMR: Colon cancer SMR; Rec SMR: Rectal cancer SMR