Table 5.
Multivariate Poisson regression model on incidence and prevalence rates of Alzheimer's disease (AD) in Taiwan from 2004–2010.
| Variables | Incidence rates | Prevalence rates | ||||||
|---|---|---|---|---|---|---|---|---|
| Crude IRR† | 95% CI† | Adjusted IRR† | 95% CI† | Crude PRR† | 95% CI† | Adjusted PRR† | 95% CI† | |
| Year (ref. = 2004)† | ||||||||
| 2005 | 0.96∗ | 0.93–0.98 | 0.94∗ | 0.92–0.97 | 1.13∗ | 1.11–1.14 | 1.11∗ | 1.09–1.12 |
| 2006 | 1.01 | 0.98–1.03 | 0.98 | 0.95–1.00 | 1.26∗ | 1.25–1.28 | 1.21∗ | 1.19–1.22 |
| 2007 | 1.02 | 1.00–1.05 | 0.98 | 0.95–1.00 | 1.39∗ | 1.38–1.41 | 1.30∗ | 1.29–1.32 |
| 2008 | 1.01 | 0.98–1.03 | 0.95 | 0.93–1.00 | 1.52∗ | 1.50–1.53 | 1.39∗ | 1.38–1.41 |
| 2009 | 1.02 | 0.99–1.05 | 0.95∗ | 0.92–0.97 | 1.63∗ | 1.62–1.65 | 1.47∗ | 1.46–1.49 |
| 2010 | 1.03∗ | 1.01–1.05 | 0.94∗ | 0.91–0.96 | 1.76∗ | 1.74–1.78 | 1.54∗ | 1.52–1.55 |
| Trend test | β = 0.0076, p < 0.0001 | β = −0.0069, p=0.7480 | β = 0.0920, p < 0.0001 | β = 0.0696, p < 0.0001 | ||||
|
| ||||||||
| Age (ref. = 65–69)† | ||||||||
| 70–74 | 2.09∗ | 2.03–2.15 | 2.09∗ | 2.04–2.15 | 2.18∗ | 2.15–2.20 | 2.17∗ | 2.15–2.20 |
| 75–79 | 3.74∗ | 3.65–3.84 | 3.80∗ | 3.70–3.90 | 4.34∗ | 4.29–4.39 | 4.39∗ | 4.34–4.44 |
| 80–84 | 5.96∗ | 5.81–6.11 | 6.07∗ | 5.92–6.23 | 7.72∗ | 7.63–7.80 | 7.73∗ | 7.65–7.82 |
| ≥85 | 8.90∗ | 8.68–9.14 | 8.91∗ | 8.69–9.15 | 15.38∗ | 15.21–15.54 | 15.04∗ | 14.88–15.20 |
| Trend test | β = 0.5242, p < 0.0001 | β = 0.5255, p < 0.0001 | β = 0.6621, p < 0.0001 | β = 0.6553, p < 0.0001 | ||||
|
| ||||||||
| Sex (ref. = male)† | ||||||||
| Female | 1.34∗ | 1.32–1.36 | 1.38∗ | 1.36–1.40 | 1.32∗ | 1.31–1.33 | 1.33∗ | 1.32–1.34 |
†IRR, incidence rate ratio; PRR, prevalence rate ratio; CI, confidence interval; Ref., reference. ∗p < 0.05.