Gender and Age Differences and the Trend in the Incidence and Prevalence of Dementia and Alzheimer’s Disease in Taiwan: A 7-Year National Population-Based Study
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
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. for linear trend test <0.05.
