Factors associated with all-cause dementia prevalence.
Coefficient ( value)
95% confidence interval
Age group
65–69 (reference)
0
70–79
1.24 (<0.0001)
1.14–1.34
80–89
2.62 (<0.0001)
2.52–2.71
90 and +
3.51 (<0.0001)
3.41–3.62
Sex
Women (reference)
0
Men
−0.01 (0.50)
−0.06–0.03
Study name (year)
Hisayama 1985
0.16 (0.25)
−0.11–0.43
Hisayama 1992
−0.02 (0.85)
−0.26–0.21
Okinawa 1992 (reference)
0
Hiroshima 1996
0.30 (0.0002)
0.14–0.46
Hisayama 1998
0.08 (0.39)
−0.11–0.28
Tajiri 1998
0.37 (<0.0001)
0.19–0.55
Hisayama 2005
0.49 (<0.0001)
0.35–0.64
Ama-cho 2008
0.27 (0.007)
0.07–0.47
Results are based on a Poisson regression model where all study data are included in one model, with the Okinawa study being a reference.
**Significant at .
