TABLE 3.
Dementia incidence by year.
| No. of person-years | No. of new all-cause dementia cases (crude) | All-cause dementia incidence ratea (95% CI) (per 1,000 person-years) | No. of new AD dementia cases (crude) | AD dementia incidence ratea (95% CI) (per 1,000 person-years) | |||||||||||
| Total | Male | Female | Total | Male | Female | Total | Male | Female | Total | Male | Female | Total | Male | Female | |
| 2006 | 786211.7 | 360728.7 | 425483 | 1150 | 345 | 805 | 1.56 (1.34–1.81) | 1.02 (0.77–1.34) | 2.03 (1.71–2.41) | 744 | 225 | 519 | 1.01 (0.84–1.20) | 0.67 (0.47–0.92) | 1.31 (1.05–1.61) |
| 2007 | 775327.3 | 355242.5 | 420084.9 | 1517 | 436 | 1081 | 1.99 (1.75–2.26) | 1.25 (0.97–1.59) | 2.65 (2.27–3.08) | 922 | 261 | 661 | 1.21 (1.02–1.42) | 0.75 (0.55–1.00) | 1.62 (1.33–1.96) |
| 2008 | 766358.5 | 350678.4 | 415680 | 2178 | 672 | 1506 | 2.78 (2.51–3.09) | 1.85 (1.52–2.25) | 3.61 (3.19–4.09) | 1335 | 376 | 959 | 1.70 (1.49–1.95) | 1.04 (0.74–1.29) | 2.3 (1.97–2.68) |
| 2009 | 752669 | 344015 | 408654 | 3342 | 988 | 2354 | 4.19 (3.84–4.57) | 2.66 (2.24–3.15) | 5.54 (5.02–6.13) | 2031 | 557 | 1474 | 2.55 (2.28–2.85) | 1.51 (1.20–1.88) | 3.47 (3.23–3.74) |
| 2010 | 740455.7 | 338153.1 | 402302.6 | 3710 | 1053 | 2657 | 4.56 (4.19–4.96) | 2.77 (2.34–3.27) | 6.16 (5.61–6.78) | 2223 | 595 | 1628 | 2.73 (2.46–3.03) | 1.56 (1.26–1.94) | 3.77 (3.36–4.24) |
| 2011 | 727637.3 | 332125.2 | 395512 | 4257 | 1206 | 3051 | 5.13 (4.76–5.52) | 3.06 (2.65–3.53) | 7.00 (6.42–7.62) | 2588 | 683 | 1905 | 3.13 (2.85–3.43) | 1.74 (1.43–2.10) | 4.38 (3.93–4.87) |
| 2012 | 715996.8 | 326566.8 | 389430 | 4845 | 1457 | 3388 | 5.75 (5.35–6.15) | 3.61 (3.16–4.11) | 7.66 (7.06–8.31) | 3139 | 896 | 2243 | 3.73 (3.42–4.06) | 2.22 (1.88–2.62) | 5.09 (4.61–5.62) |
| 2013 | 699879.7 | 318984.3 | 380895.4 | 5323 | 1598 | 3725 | 6.26 (5.83–6.65) | 3.87 (3.40–4.38) | 8.38 (7.76–9.04) | 3462 | 991 | 2471 | 4.07 (3.76–4.41) | 2.41 (2.05–2.81) | 5.59 (5.09–6.13) |
| 2014 | 684968.9 | 311745.3 | 373223.6 | 5445 | 1652 | 3793 | 6.27 (5.87–6.69) | 3.90 (3.43–4.42) | 8.45 (7.83–9.11) | 3627 | 1085 | 2542 | 4.19 (3.88–4.54) | 2.57 (2.20–2.98) | 5.69 (5.20–6.23) |
| 2015 | 668607.2 | 303636.9 | 364970.3 | 5757 | 1733 | 4024 | 6.58 (6.16–7.02) | 4.01 (3.54–4.55) | 8.94 (8.30–9.63) | 4000 | 1154 | 2846 | 4.58 (4.24–4.95) | 2.68 (2.30–3.12) | 6.33 (5.80–6.91) |
| 2016 | 649304.6 | 293385.7 | 355918.9 | 6167 | 1930 | 4237 | 6.88 (6.48–7.29) | 4.28 (3.83–4.77) | 9.30 (8.68–9.95) | 4465 | 1344 | 3121 | 4.99 (4.66–5.34) | 2.99 (2.61–3.40) | 6.85 (6.33–7.42) |
| 2017 | 569072.2 | 252403.8 | 316668.3 | 5833 | 1910 | 3923 | 6.94 (6.53–7.36) | 4.52 (4.04–5.05) | 9.20 (8.58–9.87) | 4413 | 1390 | 3023 | 5.27 (4.92–5.64) | 3.29 (2.89–3.74) | 7.12 (6.57–7.70) |
CI, confidence interval; AD, Alzheimer’s disease.
aAdjusted for age and sex.