Table 1.
Characteristics of the study participants by ABO blood type (column %).
| Characteristic | O | A | B | AB | Total |
|---|---|---|---|---|---|
| Sex | |||||
| Male | 67,190 (46.2) | 42,277 (46.5) | 38,711 (46.9) | 9358 (46.1) | 157,536 (46.4) |
| Female | 78,360 (53.8) | 48,695 (53.5) | 43,920 (53.1) | 10,921 (53.9) | 181,896 (53.6) |
| Age (years) | |||||
| <65 | 134,506 (92.4) | 83,652 (92.0) | 75,859 (91.8) | 18,636 (91.9) | 312,653 (92.1) |
| ≥65 | 11,044 (7.6) | 7320 (8.0) | 6772 (8.2) | 1643 (8.1) | 26,779 (7.9) |
| Education | |||||
| Middle school or lower | 44,421 (30.5) | 27,183 (29.9) | 24,572 (29.7) | 5908 (29.1) | 102,084 (30.1) |
| High school | 38,389 (26.4) | 23,996 (26.4) | 21,723 (26.3) | 5388 (26.6) | 89,496 (26.4) |
| Junior college | 28,565 (19.6) | 18,130 (19.9) | 16,469 (19.9) | 4096 (20.2) | 67,260 (19.8) |
| College or higher | 30,218 (20.8) | 19,251 (21.2) | 17,562 (21.2) | 4360 (21.5) | 71,391 (21.0) |
| Unknown | 3957 (2.7) | 2412 (2.6) | 2305 (2.8) | 527 (2.6) | 9201 (2.7) |
| BMI (kg/m2) | |||||
| ≤18.5 | 11,937 (8.2) | 7470 (8.2) | 6868 (8.3) | 1694 (8.4) | 27,969 (8.2) |
| <25 | 94,103 (64.7) | 58,636 (64.5) | 53,158 (64.3) | 13,111 (64.7) | 219,008 (64.6) |
| <30 | 34,019 (23.4) | 21,282 (23.4) | 19,415 (23.5) | 4665 (23.0) | 79,381 (23.4) |
| ≥30 | 5451 (3.7) | 3563 (3.9) | 3171 (3.9) | 800 (3.9) | 12,985 (3.8) |
| Unknown | 40 (0.0) | 21 (0.0) | 19 (0.0) | 9 (0.0) | 89 (0.0) |
| Smoking status | |||||
| Never-smoker | 95,653 (65.7) | 59,367 (65.2) | 53,779 (65.1) | 13,254 (65.4) | 222,053 (65.4) |
| Ex-smoker | 8445 (5.8) | 5534 (6.1) | 5011 (6.1) | 1197 (5.9) | 20,187 (5.9) |
| Smoker | 32,297 (22.2) | 20,366 (22.4) | 18,602 (22.5) | 4547 (22.4) | 75,812 (22.4) |
| Unknown | 9155 (6.3) | 5705 (6.3) | 5239 (6.3) | 1281 (6.3) | 21,380 (6.3) |
| Drinking status | |||||
| Never-drinker | 103,556 (71.1) | 64,487 (70.9) | 58,455 (70.7) | 14,358 (70.8) | 240,856 (71.0) |
| Ex-drinker | 4341 (3.0) | 2782 (3.0) | 2421 (2.9) | 594 (2.9) | 10,138 (3.0) |
| Regular drinker | 26,914 (18.5) | 17,095 (18.8) | 15,670 (19.0) | 3863 (19.1) | 63,542 (18.7) |
| Unknown | 10,739 (7.4) | 6608 (7.3) | 6085 (7.4) | 1464 (7.2) | 24,896 (7.3) |
| Physical activity | |||||
| Inactive | 74,051 (50.9) | 46,700 (51.3) | 42,606 (51.6) | 10,513 (51.8) | 173,870 (51.2) |
| Low | 42,853 (29.4) | 26,566 (29.2) | 23,933 (29.0) | 5886 (29.0) | 99,238 (29.3) |
| Middle | 16,324 (11.2) | 10,008 (11.0) | 9021 (10.9) | 2124 (10.5) | 37,477 (11.0) |
| High | 4306 (3.0) | 2740 (3.0) | 2492 (3.0) | 631 (3.1) | 10,169 (3.0) |
| Unknown | 8016 (5.5) | 4958 (5.5) | 4579 (5.5) | 1125 (5.6) | 18,678 (5.5) |
| Diabetes | |||||
| No | 141,449 (97.2) | 88,198 (97.0) | 80,200 (97.1) | 19,663 (97.0) | 329,510 (97.1) |
| Yes | 4100 (2.8) | 2774 (3.1) | 2431 (2.9) | 616 (3.0) | 9921 (2.9) |
| Unknown | 1 (0.00) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 1 (0.0) |
| Family history cancer | |||||
| No | 109,117 (75.0) | 67,523 (74.2) | 61,722 (74.7) | 15,230 (75.1) | 253,592 (74.7) |
| Yes | 36,433 (25.0) | 23,449 (25.8) | 20,909 (25.3) | 5049 (24.9) | 85,840 (25.3) |
| Unknown | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
| HBV | |||||
| No | 103,242 (70.9) | 64,192 (70.6) | 58,761 (71.1) | 14,592 (72.0) | 240,787 (70.9) |
| Yes | 24,906 (17.1) | 16,022 (17.6) | 14,007 (17.0) | 3337 (16.4) | 58,272 (17.2) |
| Unknown | 17,402 (12.0) | 10,758 (11.8) | 9863 (11.9) | 2350 (11.6) | 40,373 (11.9) |