Table 2. Incidence rate ratios and cumulative incidences (by 40th birthday) for attempted suicide and violent criminal offending in the study cohort born 1971–2002: immigrant subgroups versus native Danes.
| Outcome by immigrant status | Events (n) | Incidence / 10k person yrs. | Incidence rate ratio a (95% CI) | Cumulative incidence (95% CI) | ||
|---|---|---|---|---|---|---|
| Attempted suicide | ||||||
| Males: | ||||||
| Native Danes | 16,901 | 12.3 | 1.00 | (ref.) | 3.50% | (3.44–3.56) |
| 1st generation | 411 | 17.4 | 1.33 | (1.19–1.47) | 4.09% | (3.59–4.64) |
| 2nd generation by one parent | 1311 | 15.4 | 1.27 | (1.20–1.35) | 4.12% | (3.87–4.39) |
| 2nd generation by both parents | 473 | 11.9 | 1.03 | (0.94–1.13) | 3.80% | (3.30–4.36) |
| Foreign-born adoptees | 208 | 23.1 | 1.86 | (1.61–2.13) | 6.10% | (5.21–7.09) |
| Females: | ||||||
| Native Danes | 22,857 | 17.9 | 1.00 | (ref.) | 4.26% | (4.20–4.32) |
| 1st generation | 867 | 41.8 | 1.95 | (1.82–2.10) | 7.60% | (7.06–8.18) |
| 2nd generation by one parent | 2132 | 27.1 | 1.42 | (1.35–1.48) | 5.91% | (5.62–6.22) |
| 2nd generation by both parents | 1335 | 35.9 | 1.67 | (1.58–1.71) | 7.86% | (7.07–8.70) |
| Foreign-born adoptees | 448 | 30.3 | 1.71 | (1.55–1.87) | 7.19% | (6.48–7.95) |
| Violent offending | ||||||
| Males: | ||||||
| Native Danes | 36,737 | 41.8 | 1.00 | (ref.) | 7.28% | (7.20–7.37) |
| 1st generation | 2583 | 212.4 | 4.25 | (4.08–4.43) | 23.36% | (22.35–24.38) |
| 2nd generation by one parent | 3258 | 65.5 | 1.46 | (1.41–1.52) | 10.03% | (9.63–10.44) |
| 2nd generation by both parents | 3307 | 184.8 | 3.57 | (3.44–3.70) | 21.39% | (20.20–22.61) |
| Foreign-born adoptees | 359 | 65.6 | 1.47 | (1.33–1.63) | 11.50% | (9.85–13.29) |
| Females: | ||||||
| Native Danes | 4179 | 5.0 | 1.00 | (ref.) | 0.90% | (0.86–0.93) |
| 1st generation | 146 | 11.8 | 1.78 | (1.50–2.10) | 1.73% | (1.29–2.27) |
| 2nd generation by one parent | 481 | 10.0 | 1.82 | (1.65–2.00) | 1.63% | (1.43–1.86) |
| 2nd generation by both parents | 238 | 12.7 | 1.80 | (1.57–2.05) | 1.46% | (1.17–1.81) |
| Foreign-born adoptees | 56 | 5.6 | 1.15 | (0.87–1.48) | 1.15% | (0.79–1.63) |
a Incidence rate ratio adjusted for age and calendar year period. Further adjustment for secondary care treated parental mental illness had only a minor impact on the observed strengths of association.