Coronary artery bypass grafting during 2001–2009
| Sex and age groups | Incident cases | Person years in 1000 | Crude incidence rate per 1000 person years (95% CI) | Expected number of cases* | SIR (95% CI)* |
| Men | |||||
| 25–39 | 3 | 3.2 | 0.9 (0.3 to 2.9) | 0.3 | 10.7 (3.5 to 33.3) |
| 40–49 | 16 | 2.2 | 7.2 (4.4 to 11.8) | 1.6 | 10.1 (6.2 to 16.6) |
| 50–59 | 12 | 1.6 | 7.7 (4.4 to 13.5) | 3.3 | 3.6 (2.0 to 6.3) |
| 60–69 | 11 | 0.9 | 12.8 (7.1 to 23.1) | 3.2 | 3.5 (1.9 to 6.3) |
| 70–79 | 5 | 0.3 | 17.2 (7.2 to 41.4) | 1.3 | 3.8 (1.6 to 0.2) |
| 80+ | 1 | 0.03 | 35.4 (5.0 to 251.4) | 0.1 | 12.9 (1.8 to 91.8) |
| Total | 48 | 8.1 | 5.9 (4.4 to 7.8) | 9.7 | 4.9 (3.7 to 6.5) |
| Women | |||||
| 25–39 | 1 | 3.5 | 0.3 (0.0 to 2.0) | 0.1 | 12.4 (1.7 to 88.1) |
| 40–49 | 3 | 2.4 | 1.3 (0.4 to 3.9) | 0.3 | 8.6 (2.8 to 26.6) |
| 50–59 | 5 | 2.0 | 2.5 (1.0 to 6.0) | 1.0 | 5.1 (2.1 to 12.3) |
| 60–69 | 5 | 1.2 | 4.3 (1.8 to 10.2) | 1.3 | 3.7 (1.5 to 8.9) |
| 70–79 | 9 | 0.5 | 19.5 (10.2 to 37.5) | 0.8 | 10.8 (5.6 to 20.7) |
| 80+ | 0 | 0.1 | 0 | 0.1 | – |
| Total | 23 | 9.7 | 2.4 (1.6 to 3.6) | 3.7 | 6.2 (4.1 to 9.3) |
Statistically significant results in bold.
*Age-standardised by indirect standardisation with reference rates for the total Norwegian population during 2001–2009 stratified by sex, calendar year and 1 year age groups.
SIR, standardised incidence ratio.