Table 3.
Association between receipt of screening endoscopy and colorectal adenocarcinoma death risk; excluding persons who had undergone faecal occult blood or sigmoidoscopy screening
| Screening colonoscopy status according to colon location | Estimated relative risks (95% CI) |
|||
|---|---|---|---|---|
| Case patients, n=836 | Matched control patients, n=1453 | Bivariate model | Multivariate model* | |
| All locations in the colon/rectum | ||||
| No screening endoscopy | 822 | 1453 | 1.00 | 1.00 |
| Screening colonoscopy | 14 | 66 | 0.39 (0.18 to 0.84) | 0.37 (0.16 to 0.84) |
| Right colon | ||||
| No screening endoscopy | 370 | 647 | 1.00 | 1.00 |
| Screening colonoscopy | 6 | 34 | 0.42 (0.15 to 1.17) | 0.36 (0.11 to 1.17) |
| Left colon/rectum | ||||
| No screening endoscopy | 423 | 655 | 1.00 | 1.00 |
| Screening colonoscopy | 7 | 28 | 0.29 (0.08 to 1.04) | 0.26 (0.06 to 1.02) |
*Multivariate conditional logistic regression models were adjusted for race/ethnicity, family history, percentage of people 25+ years in the census tract with at least a high-school diploma, Charlson score and number of primary care visits. Analysis excluded all people exposure to screening with faecal occult blood test or sigmoidoscopy.