Table 4 Odds ratio of dementia in relation to individual characteristics and environmental exposure in the residential township of the study subjects (Environmental exposure according to tertile classification)
Variables | Model 1 | Model 2 | Model 3 | Model 4 | Model 5 |
|---|---|---|---|---|---|
Intercept (SD)a | 0.05 (0.03) | −0.16* (0.05) | −0.06 (0.06) | −0.30* (0.06) | −0.34* (0.08) |
Physical environments | |||||
 Parks, greeneries, and square area (ref: Low)b | |||||
  Medium | 0.98 (0.92–1.04) | 0.98 (0.91–1.04) | 0.97 (0.91–1.04) | 0.97 (0.91–1.04) | |
  High | 1.02 (0.95–1.09) | 1.02 (0.95–1.09) | 1.01 (0.94–1.09) | 1.00 (0.93–1.08) | |
 Playgrounds and sport venues (ref: Low)b | |||||
  Medium | 0.98 (0.92–1.05) | 0.98 (0.92–1.04) | 0.98 (0.92–1.05) | 0.97 (0.90–1.04) | |
  High | 0.88* (0.82–0.95) | 0.88* (0.81–0.95) | 0.88* (0.82–0.96) | 0.88* (0.81–0.95) | |
 Community center (ref: Low)b | |||||
  Medium | 0.92*(0.87–0.99) | 0.92*(0.86–0.99) | 0.94 (0.87–1.00) | 0.95 (0.88–1.02) | |
  High | 0.94 (0.86–1.02) | 0.94 (0.86–1.04) | 0.95 (0.86–1.05) | 0.98 (0.88–1.08) | |
Social environments | |||||
 Median annual family income (ref: Low)b | |||||
  Medium | 1.13* (1.04–1.23) | 1.12* (1.03–1.22) | 1.11* (1.01–1.21) | 1.09 (0.99–1.19) | |
  High | 1.14*(1.04–1.25) | 1.08 (0.98–1.19) | 1.04 (0.94–1.15) | 1.01 (0.91–1.12) | |
 Illiterate people aged≧65 (ref: Low)b | |||||
  Medium | 1.04 (0.97–1.13) | 1.04 (0.97–1.12) | 1.05 (0.98–1.12) | 1.04 (0.97–1.12) | |
  High | 1.02 (0.94–1.11) | 1.03 (0.95–1.12) | 1.05 (0.96–1.15) | 1.06 (0.97–1.15) | |
 Elderly living alone (ref: Low)b | |||||
  Medium | 1.00 (0.93–1.06) | 1.01 (0.95–1.07) | 1.01 (0.94–1.07) | 1.01 (0.95–1.08) | |
  High | 1.05 (0.97–1.14) | 1.06 (0.98–1.15) | 1.07 (0.99–1.16) | 1.08 (0.99–1.18) | |