Table 1.
Prevalence of dementia according to demographic characteristics and lifestyle factors.
| Characteristic | Male | P-value† | Female | P-value† | |||
|---|---|---|---|---|---|---|---|
| Dementia | Normal | Dementia | Normal | ||||
| All | 22,189 (4.0) | 529,802 (96.0) | 35,088 (6.4) | 515,399 (93.6) | |||
| Age, years | 65–70 | 5,268 (1.8) | 287,735 (98.2) | <0.001 | 7,548 (2.7) | 276,151 (97.3) | <0.001 |
| 71–75 | 4,835 (3.9) | 117,811 (96.1) | 7,208 (6.0) | 112,702 (94.0) | |||
| 76–80 | 7,487 (7.2) | 96,612 (92.8) | 12,543 (11.4) | 97,858 (88.6) | |||
| ≥81 | 4,599 (14.3) | 27,644 (85.7) | 7,789 (21.4) | 28,688 (78.7) | |||
| Household incomea | Low | 2,912 (3.2) | 87,076 (96.8) | <0.001 | 5,512 (5.6) | 93,628 (94.4) | <0.001 |
| Lower-middle | 2,601 (2.8) | 90,796 (97.2) | 3,706 (6.3) | 55,625 (93.8) | |||
| Middle | 2,723 (2.8) | 70,803 (96.3) | 4,290 (6.4) | 62,543 (93.6) | |||
| Upper-middle | 4,638 (4.1) | 108,313 (95.9) | 6,850 (6.1) | 106,445 (94.0) | |||
| High | 9,315 (5.1) | 172,814 (94.9) | 14,730 (7.0) | 197,158 (93.1) | |||
| Residence | Urban | 17,666 (3.8) | 451,638 (96.2) | <0.001 | 27,202 (5.9) | 436,738 (94.1) | <0.001 |
| Rural | 4,523 (5.5) | 78,164 (94.5) | 7,886 (9.1) | 78,661 (90.9) | |||
| Smoking | Yes | 2,464 (2.9) | 83,512 (97.1) | <0.001 | 348 (5.8) | 5,629 (94.2) | 0.079 |
| No | 19,725 (4.2) | 446,290 (95.8) | 34,740 (6.4) | 509,770 (93.6) | |||
| Alcohol consumption | Yes | 3,434 (2.2) | 149,583 (97.8) | <0.001 | 610 (3.4) | 17,138 (96.6) | <0.001 |
| No | 18,755 (4.7) | 380,219 (95.3) | 34,478 (6.5) | 498,261 (93.5) | |||
| Diabetes mellitus | Yes | 9,665 (5.3) | 172,648 (94.7) | <0.001 | 14,304 (8.4) | 156,517 (91.6) | <0.001 |
| No | 12,524 (3.4) | 357,154 (96.6) | 20,784 (5.5) | 358,882 (94.5) | |||
| Hypertension | Yes | 15,027 (4.7) | 308,332 (95.4) | <0.001 | 24,799 (7.5) | 305,876 (92.5) | <0.001 |
| No | 7,162 (3.1) | 221,470 (96.9) | 10,289 (4.7) | 209,523 (95.3) | |||
| Periodontitis | Yes | 1,157 (2.6) | 43,012 (97.4) | <0.001 | 1,793 (4.2) | 41,069 (95.8) | <0.001 |
| No | 21,032 (4.1) | 486,790 (95.9) | 33,295 (6.6) | 474,330 (93.4) | |||
| Denture wear | Yes | 5,498 (6.6) | 78,332 (93.4) | <0.001 | 9,092 (10.4) | 78,383 (89.6) | <0.001 |
| No | 16,691 (3.6) | 451,470 (96.4) | 25,996 (5.6) | 437,016 (94.4) | |||
†P-value calculated by chi-squared test. aQuintiles based on the insurance fee imposed on each household.
The data are presented as n(%).