Table 4 Extended Cox Regression Model: first post-operative colonoscopy variables associated with time period of diagnosis
Month 1 – 12 | Month 13 – 60 | |
|---|---|---|
HR (95% CI) | HR (95% CI) | |
Sex (M vs F) | ||
1983 – 1989 | 0.88 (0.69 – 1.11) | 1.24 (1.01 – 1.53) |
1990 – 1995 | 0.92 (0.76 – 1.11) | 0.87 (0.73 – 1.05) |
Pre-operative colonoscopy (yes vs no) | ||
1983 – 1989 | 1.52 (1.20 – 1.91) | 1.57 (1.29 – 1.93) |
1990 – 1995 | 0.88 (0.73 – 1.06) | 1.46 (1.22 – 1.75) |
Site of surgery (vs. edmonton) | ||
1983 – 1989 | ||
Calgary | 0.56 (0.43 – 0.74) | 0.61 (0.48 – 0.78) |
Other major city | 0.71 (0.50 – 1.02) | 0.69 (0.50 – 0.95) |
Other | 0.74 (0.46 – 1.20) | 0.66 (0.46 – 0.96) |
1990 – 1995 | ||
Calgary | 0.54 (0.43 – 0.68) | 1.08 (0.87 – 1.33) |
Other major city | 1.06 (0.82 – 1.37) | 1.34 (1.04 – 1.73) |
Other | 0.78 (0.53 – 1.15) | 0.97 (0.66 – 1.42) |