Table 1 Characteristics of the participants (n = 71,227).
Characteristics | All participants (n = 71,227) | Experienced pneumonia within last one-year (n = 1,666) | Not experienced pneumonia within last one-year (n = 69,561) | |||
|---|---|---|---|---|---|---|
n | % | n | % | n | % | |
Frequency of denture cleaning | ||||||
Daily | 67,208 | 94.4 | 1,547 | 92.9 | 65,661 | 94.4 |
Non-daily | 3,293 | 4.6 | 100 | 6.0 | 3,193 | 4.6 |
Missing | 726 | 1.0 | 19 | 1.1 | 707 | 1.0 |
Age | ||||||
65–69 years | 16,770 | 23.5 | 248 | 14.9 | 16,522 | 23.8 |
70–74 years | 18,579 | 26.1 | 365 | 21.9 | 18,214 | 26.2 |
75–79 years | 17,347 | 24.4 | 425 | 25.5 | 16,922 | 24.3 |
80–84 years | 11,858 | 16.6 | 369 | 22.2 | 11,489 | 16.5 |
≥85 years | 6,673 | 9.4 | 259 | 15.6 | 6,414 | 9.2 |
Sex | ||||||
Male | 34,393 | 48.3 | 984 | 59.1 | 33,409 | 48.0 |
Female | 36,825 | 51.7 | 682 | 40.9 | 36,143 | 52.0 |
Missing | 9 | 0.0 | 0 | 0.0 | 9 | 0.0 |
Education | ||||||
≤9 years | 25,133 | 35.3 | 706 | 42.4 | 24,427 | 35.1 |
10–12 years | 28,513 | 40.0 | 596 | 35.8 | 27,917 | 40.1 |
≥13 years | 16,611 | 23.3 | 331 | 19.9 | 16,280 | 23.4 |
Missing | 970 | 1.4 | 33 | 2.0 | 937 | 1.4 |
Equivalent income (100 JPY ≈ 1 USD) | ||||||
<1,000,000 JPY | 7,568 | 10.6 | 230 | 13.8 | 7,338 | 10.6 |
1,000,0000–1,999,999 JPY | 21,017 | 29.5 | 455 | 27.3 | 20,562 | 29.6 |
2,000,0000–2,999,999 JPY | 13,401 | 18.8 | 274 | 16.5 | 13,127 | 18.9 |
3,000,0000–3,999,999 JPY | 8,055 | 11.3 | 124 | 7.4 | 7,931 | 11.4 |
≥4,000,000 JPY | 5,701 | 8.0 | 117 | 7.0 | 5,584 | 8.0 |
Missing | 15,485 | 21.8 | 466 | 28.0 | 15,019 | 21.6 |
Smoking status | ||||||
Never | 39,027 | 54.8 | 702 | 42.2 | 38,325 | 55.1 |
Quite | 22,368 | 31.4 | 772 | 46.3 | 21,596 | 31.1 |
Current | 8,726 | 12.3 | 145 | 8.7 | 8,581 | 12.3 |
Missing | 1,106 | 1.5 | 47 | 2.8 | 1,059 | 1.5 |
Dementia | ||||||
Yes | 484 | 0.7 | 16 | 1.0 | 468 | 0.7 |
No | 68,468 | 96.1 | 1,620 | 97.2 | 66,848 | 96.1 |
Missing | 2,275 | 3.2 | 30 | 1.8 | 2,245 | 3.2 |
Stroke | ||||||
Yes | 2,197 | 3.1 | 76 | 4.6 | 2,121 | 3.1 |
No | 66,755 | 93.7 | 1,560 | 93.6 | 65,195 | 93.7 |
Missing | 2,275 | 3.2 | 30 | 1.8 | 2,245 | 3.2 |
Activities of daily living | ||||||
No need for personal assistance | 63,052 | 88.5 | 1,300 | 78.0 | 61,752 | 88.8 |
Require some personal assistance | 4,787 | 6.7 | 255 | 15.3 | 4,532 | 6.5 |
Missing | 3,388 | 4.8 | 111 | 6.7 | 3,277 | 4.7 |
Number of teeth | ||||||
0 | 10,620 | 14.9 | 337 | 20.2 | 10,283 | 14.8 |
1–4 | 7,577 | 10.6 | 217 | 13.0 | 7,360 | 10.6 |
5–9 | 11,707 | 16.4 | 299 | 18.0 | 11,408 | 16.4 |
10–19 | 20,687 | 29.1 | 437 | 26.2 | 20,250 | 29.1 |
≥20 | 19,096 | 26.8 | 320 | 19.2 | 18,776 | 27.0 |
Missing | 1,540 | 2.2 | 56 | 3.4 | 1,484 | 2.1 |
Experience of pneumococcal vaccination within last five-year | ||||||
Yes | 30,174 | 42.4 | 1,016 | 61.0 | 29,158 | 41.9 |
No | 39,349 | 55.2 | 565 | 33.9 | 38,784 | 55.8 |
Missing | 1,704 | 2.4 | 85 | 5.1 | 1,619 | 2.3 |
