SIR and 95% CIs for cancer among patients with a hospital-based diagnosis of a venous ulcer, Denmark, 1982-2012
| Follow-up time . | All cancers . | Hematological cancers . | Nonhematological cancers . |
|---|---|---|---|
| Overall | 1.11 (1.07-1.14) | 1.30 (1.15-1.47) | 1.09 (1.06-1.13) |
| <90 d | 2.07 (1.82-2.34) | 3.50 (2.26-5.16) | 1.98 (1.73-2.25) |
| 90 d to <1 y | 1.16 (1.05-1.28) | 1.24 (0.80-1.83) | 1.15 (1.04-1.27) |
| 1 to <4 y | 1.12 (1.06-1.19) | 1.32 (1.06-1.64) | 1.11 (1.05-1.18) |
| 4 to <7 y | 1.05 (0.97-1.12) | 1.22 (0.91-1.60) | 1.03 (0.96-1.11) |
| 7 to <10 y | 1.02 (0.93-1.12) | 1.03 (0.68-1.49) | 1.02 (0.93-1.12) |
| ≥10 y | 1.01 (0.94-1.09) | 1.18 (0.87-1.56) | 1.00 (0.93-1.08) |
| Follow-up time . | All cancers . | Hematological cancers . | Nonhematological cancers . |
|---|---|---|---|
| Overall | 1.11 (1.07-1.14) | 1.30 (1.15-1.47) | 1.09 (1.06-1.13) |
| <90 d | 2.07 (1.82-2.34) | 3.50 (2.26-5.16) | 1.98 (1.73-2.25) |
| 90 d to <1 y | 1.16 (1.05-1.28) | 1.24 (0.80-1.83) | 1.15 (1.04-1.27) |
| 1 to <4 y | 1.12 (1.06-1.19) | 1.32 (1.06-1.64) | 1.11 (1.05-1.18) |
| 4 to <7 y | 1.05 (0.97-1.12) | 1.22 (0.91-1.60) | 1.03 (0.96-1.11) |
| 7 to <10 y | 1.02 (0.93-1.12) | 1.03 (0.68-1.49) | 1.02 (0.93-1.12) |
| ≥10 y | 1.01 (0.94-1.09) | 1.18 (0.87-1.56) | 1.00 (0.93-1.08) |
SIRs computed according to Danish national cancer incidence rates according to 5-year age groups, sex, and 5-year intervals of year of diagnosis. CIs were derived using Byar approximation, assuming that the observed number of cases in a specific category follows a Poisson distribution. We used exact 95% CIs when the observed number of cancers was <10.