Table 3.
Dementia incidence by race/ethnicity and sex, 2000-2013.
| Female | ||||||
|---|---|---|---|---|---|---|
| Race/ethnicity | Events | Person-years | Age-adjusted incidence rate per 1,000 person-years (95% CI) | Hazard ratio (95% CI) | ||
| Model 1 | Model 2 | Model 3 | ||||
| African American | 2,921 | 89,670 | 26.29 (25.29, 27.28) | 1.60 (1.51, 1.69) | 1.60 (1.51, 1.69) | 1.50 (1.42, 1.58) |
| American Indian and Alaska Native | 711 | 22,920 | 22.17 (20.42, 23.92) | 1.35 (1.24, 1.46) | 1.34 (1.23, 1.45) | 1.24 (1.14, 1.35) |
| Latino | 2,497 | 106,277 | 20.14 (19.32, 20.97) | 1.26 (1.19, 1.33) | 1.25 (1.18, 1.32) | 1.19 (1.12, 1.26) |
| Pacific Islander | 29 | 1,798 | 17.67 (10.74, 24.59) | 1.03 (0.72, 1.49) | 1.04 (0.72, 1.51) | 0.98 (0.68, 1.42) |
| White | 27,070 | 984,055 | 19.71 (19.46, 19.97) | 1.20 (1.15, 1.25) | 1.19 (1.14, 1.25) | 1.16 (1.11, 1.21) |
| Asian American | 2,219 | 122,844 | 16.03 (15.33, 16.73) | 1.00 ( ref) | 1.00 ( ref) | 1.00 ( ref) |
| Male | ||||||
| Race/ethnicity | Events | Person-years | Age-adjusted incidence rate per 1,000 person-years (95% CI) | Hazard ratio (95% CI) | ||
| Model 1 | Model 2 | Model 3 | ||||
| African American | 2,021 | 67,448 | 27.05 (25.82, 28.28) | 1.93 (1.81, 2.06) | 1.93 (1.81, 2.06) | 1.88 (1.76, 2.01) |
| American Indian and Alaska Native | 513 | 18,261 | 21.98 (19.93, 24.03) | 1.54 (1.40, 1.71) | 1.53 (1.39, 1.69) | 1.45 (1.31, 1.60) |
| Latino | 1,874 | 89,409 | 18.87 (17.96, 19.78) | 1.34 (1.25, 1.43) | 1.34 (1.25, 1.43) | 1.31 (1.23, 1.40) |
| Pacific Islander | 32 | 1,447 | 23.08 (14.95, 31.22) | 1.58 (1.12, 2.25) | 1.63 (1.15, 2.31) | 1.58 (1.12, 2.25) |
| White | 18,040 | 766,197 | 18.76 (18.47, 19.05) | 1.33 (1.26, 1.40) | 1.32 (1.25, 1.39) | 1.29 (1.23, 1.36) |
| Asian American | 1,628 | 101,276 | 14.29 (13.56, 15.02) | 1.00 ( ref) | 1.00 ( ref) | 1.00 ( ref) |
Age-adjusted dementia incidence rates use 2000 US Census as standard. Hazard ratios for dementia are from sex-specific Cox proportional hazards models. Model 1: adjusted for age (as timescale); Model 2: Model 1 + healthcare utilization (≥1 heathcare visit per year); Model 3: Model 2 + depression, diabetes, hypertension, stroke, and cardiovascular disease. P-values for multiplicative interaction terms between race/ethnicity and sex from a pooled-sex model adjusted for age (as timescale) to test whether racial inequalities in dementia incidence differ by sex: African American vs. Asian American p<0.001; American Indian Alaska Native vs. Asian American p=0.043; Latino vs. Asian American p=0.141; Pacific Islander vs. Asian American p= 0.097; White vs. Asian American p=0.003.