Outcome | CQI, HR (95% CI) | Continuous (per SD increment) | ||||
---|---|---|---|---|---|---|
Quartile 1 (lowest) | Quartile 2 | Quartile 3 | Quartile 4 (highest) | P for trenda | ||
Mean (SD) value of CQI | 8.4 (1.6) | 11.5 (0.5) | 13.5 (0.5) | 16.1 (1.2) | ||
Person-years | 284,550 | 208,129 | 200,002 | 203,361 | ||
Overallb | ||||||
Cases, n | 373 | 249 | 238 | 225 | ||
Incidence rate (95% CI)c | 1.31 (1.18, 1.45) | 1.20 (1.06, 1.35) | 1.19 (1.05, 1.35) | 1.11 (0.97, 1.26) | ||
Model 1d | 1.00 (reference) | 0.87 (0.74, 1.02) | 0.85 (0.72, 1.00) | 0.76 (0.65, 0.90) | 0.001 | 0.91 (0.86, 0.97) |
Model 2e | 1.00 (reference) | 0.89 (0.76, 1.05) | 0.88 (0.75, 1.04) | 0.81 (0.68, 0.96) | 0.016 | 0.93 (0.87, 0.99) |
Model 3f | 1.00 (reference) | 0.89 (0.76, 1.05) | 0.88 (0.74, 1.04) | 0.80 (0.67, 0.96) | 0.012 | 0.93 (0.87, 0.99) |
Proximal colon | ||||||
Cases, n | 208 | 143 | 141 | 148 | ||
Incidence rate (95% CI)c | 0.73 (0.64, 0.84) | 0.69 (0.58, 0.81) | 0.70 (0.60, 0.83) | 0.73 (0.62, 0.85) | ||
Model 1d | 1.00 (reference) | 0.88 (0.71, 1.09) | 0.88 (0.71, 1.09) | 0.87 (0.70, 1.08) | 0.181 | 0.95 (0.87, 1.02) |
Model 2e | 1.00 (reference) | 0.91 (0.74, 1.13) | 0.94 (0.75, 1.17) | 0.96 (0.76, 1.20) | 0.664 | 0.98 (0.90, 1.07) |
Model 3f | 1.00 (reference) | 0.91 (0.73, 1.13) | 0.93 (0.74, 1.16) | 0.94 (0.75, 1.18) | 0.559 | 0.98 (0.90, 1.06) |
Distal colon | ||||||
Cases, n | 88 | 54 | 43 | 39 | ||
Incidence rate (95% CI)c | 0.31 (0.25, 0.38) | 0.26 (0.20, 0.34) | 0.21 (0.16, 0.29) | 0.19 (0.14, 0.26) | ||
Model 1d | 1.00 (reference) | 0.83 (0.59, 1.16) | 0.68 (0.47, 0.98) | 0.60 (0.41, 0.88) | 0.004 | 0.81 (0.71, 0.93) |
Model 2e | 1.00 (reference) | 0.86 (0.61, 1.22) | 0.72 (0.49, 1.05) | 0.65 (0.43, 0.97) | 0.023 | 0.84 (0.73, 0.97) |
Model 3f | 1.00 (reference) | 0.86 (0.61, 1.22) | 0.72 (0.49, 1.05) | 0.65 (0.43, 0.97) | 0.024 | 0.84 (0.73, 0.97) |
Rectum | ||||||
Cases, n | 71 | 47 | 49 | 32 | ||
Incidence rate (95% CI)c | 0.25 (0.2, 0.31) | 0.23 (0.17, 0.30) | 0.24 (0.19, 0.32) | 0.16 (0.11, 0.22) | ||
Model 1d | 1.00 (reference) | 0.88 (0.61, 1.28) | 0.95 (0.66, 1.37) | 0.60 (0.40, 0.92) | 0.030 | 0.89 (0.77, 1.02) |
Model 2e | 1.00 (reference) | 0.88 (0.61, 1.28) | 0.94 (0.64, 1.36) | 0.59 (0.38, 0.91) | 0.027 | 0.88 (0.76, 1.02) |
Model 3f | 1.00 (reference) | 0.88 (0.61, 1.28) | 0.93 (0.64, 1.36) | 0.58 (0.38, 0.91) | 0.027 | 0.88 (0.76, 1.02) |