Table 2.
Complete case analysis
| Model | Ethnicity | Men (n=536,920)
|
Women (n=607,275)
|
||
|---|---|---|---|---|---|
| IRR | 95% CI | IRR | 95% CI | ||
| M0 | White | 1 | 1 | ||
| Asian | 1.01 | 0.88–1.15 | 0.96 | 0.84–1.09 | |
| Black | 1.31 | 1.10–1.56 | 1.38 | 1.19–1.60 | |
| Mixed/other | 0.87 | 0.69–1.11 | 0.91 | 0.75–1.11 | |
|
| |||||
| M1 | White | 1 | 1 | ||
| Asian | 0.96 | 0.84–1.10 | 0.92 | 0.81–1.05 | |
| Black | 1.20 | 1.01–1.43 | 1.29 | 1.11–1.49 | |
| Mixed/other | 0.85 | 0.67–1.07 | 0.90 | 0.73–1.10 | |
|
| |||||
| M2 | White | 1 | 1 | ||
| Asian | 0.90 | 0.79–1.03 | 0.91 | 0.80–1.04 | |
| Black | 1.20 | 1.00–1.42 | 1.30 | 1.12–1.51 | |
| Mixed/other | 0.86 | 0.68–1.09 | 0.91 | 0.75–1.11 | |
|
| |||||
| M3 | White | 1 | 1 | ||
| Asian | 0.87 | 0.76–0.99 | 0.88 | 0.77–0.99 | |
| Black | 1.15 | 0.97–1.37 | 1.24 | 1.07–1.44 | |
| Mixed/other | 0.85 | 0.67–1.08 | 0.90 | 0.74–1.10 | |
Notes: IRRs of dementia diagnosis for Asian, black, and mixed/other ethnic groups (compared with the white ethnic group) from multivariable Poisson regression models adjusted for age (in 10-year age groups) and calendar year (2007–2015, M0); Townsend deprivation score (in quintiles, M1); prescribing index (M2); and binary indicator of diabetes (M3), stratified by sex; n=1,144,195. Models M1–M3 incrementally added a given variable to all the variables previously included in M0.
Abbreviation: IRR, incidence rate ratio.