Table 1. Trends in age-standardized incidence rates of colon and rectal cancer during 1959-1997 in Miyagi Prefecture, Japan.
| Year of diagnosis | |||||||||
| 1959-61 | 1962-64 | 1965-67 | 1968-72 | 1973-77 | 1978-82 | 1983-87 | 1988-92 | 1993-97 | |
| Males | |||||||||
| Population* | 848,579 | 846,000 | 858,000 | 889,036 | 960,245 | 1025,903 | 1,071,741 | 1,105,103 | 1,144,739 |
| Colon Cancer | |||||||||
| Cases† | 71 | 88 | 110 | 226 | 400 | 619 | 1,118 | 1,904 | 3,108 |
| ASR(J)‡ | 5.1 | 5.7 | 6.3 | 7.8 | 11.9 | 15.8 | 24.3 | 34.4 | 47.9 |
| ASR(W)§ | 3.9 | 4.1 | 4.7 | 5.5 | 8.3 | 11.0 | 17.1 | 24.8 | 34.6 |
| Rectal Cancer | |||||||||
| Cases | 103 | 102 | 152 | 279 | 437 | 603 | 830 | 1,276 | 1,815 |
| ASR(J) | 7.2 | 6.7 | 9.4 | 9.7 | 13.4 | 15.2 | 17.7 | 23.0 | 28.1 |
| ASR(W) | 5.3 | 4.8 | 7.0 | 6.9 | 9.2 | 10.9 | 12.8 | 16.6 | 20.5 |
| Females | |||||||||
| Population | 894,616 | 894,000 | 902,000 | 930,187 | 995,022 | 1,056,417 | 1,104,554 | 1,143,455 | 1,184,000 |
| Colon Cancer | |||||||||
| Cases | 92 | 102 | 134 | 279 | 440 | 705 | 1,101 | 1,574 | 2,273 |
| ASR(J) | 5.8 | 5.7 | 6.8 | 7.9 | 10.4 | 14.0 | 18.5 | 22.2 | 27.5 |
| ASR(W) | 4.1 | 4.0 | 4.9 | 5.6 | 7.3 | 10.0 | 13.2 | 15.7 | 19.6 |
| Rectal Cancer | |||||||||
| Cases | 118 | 126 | 135 | 269 | 388 | 557 | 699 | 862 | 1,075 |
| ASR(J) | 7.0 | 7.0 | 6.8 | 7.4 | 9.1 | 11.0 | 11.9 | 12.5 | 13.4 |
| ASR(W) | 4.9 | 5.0 | 5.0 | 5.3 | 6.5 | 8.1 | 8.6 | 9.0 | 9.7 |
* : Mid-year population. The populations in 1963 and 1966 were estimated by linear interpolation using the censuses.
† : Total incidence counts during each period.
‡ : ASR(J): Age-standardized incidence rate per 100,000 (direct age-standardization to the Japanese 1985 model population).
§ : ASR(W): Age-standardized incidence rate per 100,000 (direct age-standardization to the world population).