Numbers of observed cancers, relative risks (95% confidence intervals (CI)) of solid cancer in the Swedish Inpatient Register RA cohort, stratified by time since the start of follow up
| Cancer site (ICD) | 1–4 years | 5–9 years | 10+ years | |||
|---|---|---|---|---|---|---|
| No | SIR (95% CI) | No | SIR (95% CI) | No | SIR (95% CI) | |
| Study period from 1990 (or entry into cohort, if later) until 31 December 2003. Relative risk compared with the general Swedish population adjusting for age, sex, and calendar period. | ||||||
| All solid | 1131 | 1.04 (0.98 to 1.10) | 899 | 1.08 (1.01 to 1.15) | 1349 | 1.04 (0.98 to 1.09) |
| Colorectal | 135 | 0.87 (0.73 to 1.03) | 87 | 0.73 (0.59 to 0.90) | 120 | 0.64 (0.53 to 0.77) |
| Hepatobiliary | 41 | 1.36 (0.98 to 1.85) | 29 | 1.27 (0.85 to 1.82) | 33 | 0.91 (0.62 to 1.27) |
| Lung | 104 | 1.39 (1.14 to 1.69) | 106 | 1.85 (1.51 to 2.23) | 120 | 1.32 (1.10 to 1.58) |
| Breast | 137 | 0.77 (0.65 to 0.92) | 120 | 0.82 (0.68 to 0.98) | 214 | 0.88 (0.76 to 1.00) |
| Prostate | 137 | 0.90 (0.75 to 1.06) | 103 | 0.98 (0.80 to 1.19) | 150 | 1.08 (0.91 to 1.26) |
| Melanoma | 31 | 0.91 (0.62 to 1.29) | 32 | 1.22 (0.83 to 1.72) | 57 | 1.42 (1.07 to 1.83) |
| Non-melanoma skin | 112 | 1.39 (1.15 to 1.68) | 88 | 1.49 (1.20 to 1.84) | 174 | 2.04 (1.74 to 2.36) |