Table 1.
Incidence and relative risk of colorectal cancer by social demographic characteristics in a Taiwan community-based cancer screening cohort (1991-2001)
| Characteristic | Subject number | Personyr |
Colorectal cancer |
|||
| Case number | Rate1 | RR2 (95% CI3) | P | |||
| Age (yr) | ||||||
| < 50 | 12 902 | 129 055 | 18 | 13.9 | 1.00 | |
| 50-59 | 6 679 | 66 812 | 51 | 76.3 | 5.47(3.20-9.36) | < 0.01 |
| + 60 | 2 534 | 24 944 | 38 | 152.0 | 11.0 (6.30-19.4) | < 0.01 |
| Gender | ||||||
| Women | 11 192 | 112 007 | 39 | 34.8 | 1.00 | |
| Men | 10 923 | 108 805 | 68 | 62.5 | 1.81 (1.22-2.68) | < 0.01 |
| Education (yr) | ||||||
| None | 4 576 | 45 806 | 30 | 65.5 | 1.00 | |
| ≤ 6 | 9 126 | 91 009 | 56 | 61.5 | 0.94(0.61-1.47) | 0.79 |
| > 6 | 8 383 | 83 698 | 21 | 25.1 | 0.39(0.22-0.67) | < 0.01 |
| Unknown | 30 | 300 | 0 | — | — | |
| Ethnic group | ||||||
| Fukien | 14 938 | 149 709 | 73 | 48.8 | 1.01(0.67-1.52) | 0.96 |
| Others4 | 7 128 | 70 612 | 34 | 48.2 | 1.00 | |
| Unknown | 49 | 491 | 0 | — | — | |
| Residential area | ||||||
| Potzu | 3 362 | 33 680 | 23 | 68.3 | 1.51(0.95-2.39) | 0.08 |
| Other5 | 18 753 | 187 132 | 84 | 44.9 | 1.00 | |
| Married | ||||||
| Yes | 20 354 | 203 204 | 99 | 48.7 | 1.00 | |
| No | 1 671 | 16 699 | 8 | 47.9 | 0.98(0.48-2.02) | 0.97 |
| Unknown | 90 | 909 | 0 | — | — | |
| All | 22 115 | 22 0812 | 107 | 48.5 | ||
1
Rate in 105 persons/year;
2
Relative risk;
3
95% Confidence interval;
4
Including mainland Chinese, Hskka and aborigines;
5
Including Sanchi, Chutung, Kaoshu, Makung, Hushi and Paihsa.