Adjusted incidence rate ratios for overall study population (n = 45 163 419 person-years) and for immigrants (n = 8 408 633 person-years) in the cohort only, adjusted for variables listed in the table
| Variable | Adjusted rate ratio (95% CI) | |
|---|---|---|
| Overall study cohort | Immigrants in the study cohort | |
| Region of origin | ||
| Caribbean | 1.91 (1.78–2.04) | 2.06 (1.72–2.45) |
| East Africa | 0.76 (0.66–0.88) | 0.85 (0.68–1.06) |
| East Asia and Pacific | 0.55 (0.52–0.58) | 0.60 (0.50–0.71) |
| Eastern Europe and Central Asia | 0.84 (0.79–0.89) | 0.94 (0.79–1.12) |
| Latin America | 0.95 (0.87–1.02) | 1.04 (0.87–1.25) |
| Middle East and North Africa | 0.72 (0.66–0.78) | 0.80 (0.66–0.95) |
| Middle-Southern Africa | 1.14 (0.91–1.41) | 1.27 (0.97–1.67) |
| South Asia | 0.47 (0.45–0.50) | 0.52 (0.44–0.62) |
| Western Africa | 2.71 (2.41–3.05) | 3.01 (2.46–3.68) |
| Western Europe | 0.95 (0.87–1.04) | 0.95 (0.87–1.04) |
| US, Australia and New Zealand | 0.91 (0.78–1.07) | 1 (Ref.) |
| Long-term residents | 1 (Ref.) | – |
| Income quintile | ||
| 1 (lowest) | 1 (Ref.) | 1 (Ref.) |
| 2 | 1.08 (1.06–1.11) | 1.03 (0.96–1.10) |
| 3 | 1.13 (1.10–1.16) | 1.06 (0.99–1.14) |
| 4 | 1.17 (1.14–1.19) | 1.13 (1.05–1.21) |
| 5 (highest) | 1.22 (1.20–1.25) | 1.11 (1.02–1.20) |
| Age group, yr | ||
| < 50 | 0.01 (0.01–0.01) | 0.01 (0.01–0.01) |
| 50–59 | 0.31 (0.30–0.32) | 0.30 (0.28–0.31) |
| 60–69 | 1 (Ref.) | 1 (Ref.) |
| 70–79 | 1.37 (1.35–1.39) | 1.43 (1.34–1.52) |
| ≥ 80 | 1.04 (1.02–1.07) | 0.96 (0.87–1.06) |
| Immigrant admission category | ||
| Economic class | – | 1 (Ref.) |
| Family class | – | 1.01 (0.95–1.07) |
| Refugee | – | 0.94 (0.87–1.01) |
| Other | – | 0.93 (0.77–1.12) |
| Time since landing, yr | ||
| 0–5 | – | 1 (Ref.) |
| 6–10 | – | 0.77 (0.70–0.84) |
| 11–15 | – | 0.78 (0.71–0.85) |
| 16–20 | – | 0.92 (0.84–1.00) |
| ≥ 21 | – | 0.88 (0.81–0.95) |
Note: CI = confidence interval, Ref. = reference category.