Table 3.
Results of univariate analysis for rectal cancer (cases n = 112, controls n = 560)
factors | OR | 95%CI | χ2 | P | |
drining mixed water source (y = 1, n = 0) | 2.021 | 1.170 | 3.491 | 6.363 | 0.011 |
mucious blood history (y = 1, n = 0) | 2.138 | 1.122 | 4.072 | 5.335 | 0.021 |
defaecation drug using (y = 1, n = 0) | 2.280 | 0.711 | 7.312 | 1.923 | 0.166 |
cholecyst excision history (y = 1, n = 0) | 2.294 | 0.715 | 7.352 | 1.195 | 0.163 |
In Table 2, it was showed that four variables, well water drinking, mixed water source drinking, chronic diarrhea history and intestinal polyp history, were significantly associated with colon cancer (P < 0.05). The factor of appendicitis history showed an OR value close to significant level (P = 0.066). For rectal cancer in Table 3, there were two variables reached the significant level of P = 0.05, which were mixed water source drinking (OR = 2.02) and mucous blood stool history (OR = 2.14).