Table 3.
Age- and sex-specific incidence density‡ of dementia and Alzheimer's disease (AD) and secular trend in Taiwan, 2004–2010.
| Sex and age | Calendar year | Change† (%) | Trend test β | p | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | ||||
| Dementia | ||||||||||
| Male | ||||||||||
| 65–69 | 4.3 | 4.1 | 4.0 | 3.8 | 3.9 | 3.8 | 3.6 | −16.2 | −0.0234∗ | <0.0001 |
| 70–74 | 8.2 | 8.0 | 7.9 | 8.0 | 7.7 | 7.4 | 7.2 | −12.2 | −0.0195∗ | <0.0001 |
| 75–79 | 13.1 | 13.3 | 13.4 | 13.7 | 13.5 | 13.3 | 12.5 | −4.6 | −0.0047 | 0.1622 |
| 80–84 | 18.9 | 19.6 | 20.1 | 20.4 | 20.2 | 21.1 | 20.0 | 5.8 | 0.0108∗ | 0.0016 |
| ≥85 | 26.7 | 24.7 | 27.0 | 27.0 | 26.9 | 29.6 | 29.6 | 10.9 | 0.0251∗ | <0.0001 |
| Total§ | 10.2 | 10.0 | 10.2 | 10.2 | 10.2 | 10.3 | 9.9 | −2.9 | −0.0013 | 0.9497 |
| Female | ||||||||||
| 65–69 | 4.2 | 4.1 | 4.3 | 4.2 | 4.2 | 4.0 | 3.9 | −7.1 | −0.0129∗ | 0.0077 |
| 70–74 | 8.8 | 8.5 | 8.5 | 8.7 | 8.2 | 8.0 | 8.3 | −5.7 | −0.0111∗ | 0.0029 |
| 75–79 | 15.4 | 15.5 | 15.7 | 15.9 | 15.4 | 15.4 | 14.7 | −4.5 | −0.0069∗ | 0.0325 |
| 80–84 | 23.8 | 23.4 | 24.0 | 25.0 | 24.5 | 24.7 | 23.6 | −0.8 | 0.0034 | 0.2975 |
| ≥85 | 32.1 | 31.3 | 33.5 | 33.3 | 33.1 | 33.8 | 34.2 | 6.5 | 0.0116∗ | 0.0008 |
| Total§ | 11.7 | 11.5 | 11.8 | 12.0 | 11.6 | 11.6 | 11.4 | −2.6 | −0.0020 | 0.9167 |
| Female/male ratio | 1.1 | 1.2 | 1.2 | 1.2 | 1.2 | 1.1 | 1.2 | |||
|
| ||||||||||
| AD | ||||||||||
| Male | ||||||||||
| 65–69 | 1.4 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | −7.1 | −0.0064 | 0.4724 |
| 70–74 | 3.0 | 2.7 | 2.9 | 3.0 | 2.8 | 2.8 | 2.7 | −10.0 | −0.0111 | 0.0877 |
| 75–79 | 5.4 | 5.1 | 5.1 | 5.3 | 5.2 | 5.0 | 4.6 | −14.8 | −0.0164∗ | 0.0020 |
| 80–84 | 8.0 | 8.1 | 8.1 | 8.5 | 8.3 | 8.3 | 7.9 | −1.3 | 0.0006 | 0.9142 |
| ≥85 | 12.9 | 11.8 | 13.0 | 12.0 | 11.6 | 12.4 | 12.6 | −2.3 | −0.0021 | 0.7168 |
| Total§ | 4.1 | 3.9 | 4.0 | 4.1 | 3.9 | 4.0 | 3.8 | −7.3 | −0.0074 | 0.8230 |
| Female | ||||||||||
| 65–69 | 2.0 | 1.9 | 1.9 | 1.9 | 1.8 | 1.9 | 1.9 | −5.0 | −0.0053 | 0.4546 |
| 70–74 | 3.9 | 3.7 | 4.0 | 3.9 | 3.9 | 3.8 | 4.0 | 2.6 | 0.0026 | 0.6254 |
| 75–79 | 7.3 | 7.1 | 7.4 | 7.4 | 7.2 | 7.1 | 6.7 | −8.2 | −0.0112∗ | 0.0162 |
| 80–84 | 11.9 | 11.1 | 11.6 | 11.7 | 11.4 | 11.1 | 10.9 | −8.4 | −0.0101∗ | 0.0300 |
| ≥85 | 17.9 | 16.4 | 16.8 | 16.5 | 15.9 | 15.9 | 16.1 | −10.1 | −0.0155∗ | 0.0010 |
| Total§ | 8.9 | 8.4 | 8.8 | 8.7 | 8.6 | 8.5 | 8.4 | −5.6 | −0.0064 | 0.7767 |
| Female/male ratio | 2.2 | 2.2 | 2.2 | 2.2 | 2.2 | 2.1 | 2.2 | |||
‡Per 1,000 person-years.§Adjusted for age. †Change (%): percentage of changes in the incidence rates of dementia or AD between 2004 and 2010. ∗p for linear trend test <0.05.