Table 1 Descriptive Statistics of All Individual-level Variables
From: Community-level educational attainment and dementia: a 6-year longitudinal multilevel study in Japan
Urban | Non-urban | Total | ||||
|---|---|---|---|---|---|---|
Individual-level variables | n | % | n | % | n | % |
Total | 30,219 | 59.0% | 20,967 | 41.0% | 51,186 | 100.0% |
Dementia onset | ||||||
 No-dementia | 27,239 | 90.1% | 18,523 | 88.3% | 45,762 | 89.4% |
 Dementia | 2980 | 9.9% | 2444 | 11.7% | 5424 | 10.6% |
Educational attainment (year) | ||||||
 Less than 9 | 12,865 | 42.6% | 12,394 | 59.1% | 25,259 | 49.3% |
 10 or longer | 17,320 | 57.3% | 8545 | 40.8% | 25,865 | 50.5% |
 Other and data missing | 34 | 0.1% | 28 | 0.1% | 62 | 0.1% |
Sex | ||||||
 Male | 14,295 | 47.3% | 9490 | 45.3% | 23,785 | 46.5% |
 Female | 15,924 | 52.7% | 11,477 | 54.7% | 27,401 | 53.5% |
Age | ||||||
 65–74 | 17,943 | 59.4% | 11,642 | 55.5% | 29,585 | 57.8% |
 75–84 | 10,622 | 35.2% | 7814 | 37.3% | 18,436 | 36.0% |
 ≧85 | 1374 | 4.5% | 1791 | 8.5% | 3165 | 6.2% |
Equivalized income (yen) | ||||||
 Less than 1,999,999 | 14,065 | 46.5% | 11,815 | 56.3% | 25,880 | 50.6% |
 2,000,000–3,999,999 | 12,211 | 40.4% | 7078 | 33.8% | 19,290 | 37.7% |
 4,000,000 or higher | 3694 | 12.2% | 1869 | 8.9% | 5563 | 10.9% |
 Data missing | 248 | 0.8% | 205 | 1.0% | 453 | 0.9% |
Years of residence | ||||||
 Less than 5 | 373 | 1.2% | 477 | 2.3% | 850 | 1.7% |
 5–9 | 430 | 1.4% | 597 | 2.8% | 1028 | 2.0% |
 10–19 | 1074 | 3.6% | 1185 | 5.7% | 2259 | 4.4% |
 20–29 | 1463 | 4.8% | 1165 | 5.6% | 2629 | 5.1% |
 30–39 | 2797 | 9.3% | 1823 | 8.7% | 4620 | 9.0% |
 40–49 | 5745 | 19.0% | 2986 | 14.2% | 8731 | 17.1% |
 50 or longer | 18,315 | 60.6% | 12,712 | 60.6% | 31,027 | 60.6% |
 Data missing | 21 | 0.1% | 21 | 0.1% | 43 | 0.1% |
Social isolation | ||||||
 No | 29,317 | 97.0% | 20,503 | 97.8% | 49,820 | 97.3% |
 Yes | 852 | 2.8% | 429 | 2.0% | 1280 | 2.5% |
 Data missing | 50 | 0.2% | 35 | 0.2% | 85 | 0.2% |
Disease status in treatment | ||||||
 Stroke: Yes | 331 | 1.1% | 291 | 1.4% | 622 | 1.2% |
 Hypertension: Yes | 11,965 | 39.6% | 8553 | 40.8% | 20,518 | 40.1% |
 Diabetes: Yes | 5132 | 17.0% | 3364 | 16.0% | 8496 | 16.6% |
 Hearing loss: Yes | 1986 | 6.6% | 1679 | 8.0% | 3665 | 7.2% |
Frequency of drinking | ||||||
 Every day | 8824 | 29.2% | 5861 | 28.0% | 14,685 | 28.7% |
 3–6 days/week | 10,917 | 36.1% | 7605 | 36.3% | 18,522 | 36.2% |
 1–2 days/week | 5017 | 16.6% | 3547 | 16.9% | 8565 | 16.7% |
 1–3 days/month | 3039 | 10.1% | 2112 | 10.1% | 5151 | 10.1% |
 Less than 1 day/month | 1540 | 5.1% | 1188 | 5.7% | 2728 | 5.3% |
 Data missing | 881 | 2.9% | 654 | 3.1% | 1536 | 3.0% |
Smoking status | ||||||
 Non | 17,236 | 57.0% | 12,751 | 60.8% | 29,987 | 58.6% |
 Past | 9612 | 31.8% | 6003 | 28.6% | 15,615 | 30.5% |
 Current | 3235 | 10.7% | 2101 | 10.0% | 5336 | 10.4% |
 Data missing | 136 | 0.4% | 113 | 0.5% | 248 | 0.5% |