Variables | Categories | Number (%) | p value* | |
---|---|---|---|---|
 |  | Yes | No |  |
Household income per year (1 million KRW) | <5 | 13 (5.8) | 212 (94.2) | 0.1194 |
 | 5 - < 10 | 38 (6.5) | 548 (93.5) |  |
 | 10 - < 20 | 79 (4.4) | 1716 (95.6) |  |
 | 20 - < 50 | 257 (4.5) | 5454 (95.5) |  |
 | ≥50 | 117 (4.3) | 2595 (95.7) |  |
Home value | <50 | 24 (2.6) | 901 (97.4) | 0.065 |
(1 million KRW) | 50 - < 100 | 44 (3.0) | 1,450 (97.1) |  |
 | 100 - < 200 | 42 (2.0) | 2,078 (98.0) |  |
 | 200 - < 500 | 38 (1.8) | 2,046 (98.2) |  |
 | ≥500 | 13 (1.5) | 885 (98.6) |  |
Education | ≤Elementary | 41 (3.0) | 1,341 (97.0) | 0.0382 |
 | Middle | 25 (2.0) | 1,257 (98.1) |  |
 | High | 126 (2.5) | 4,998 (97.5) |  |
 | ≥University | 73 (1.8) | 3,968 (98.2) |  |
Occupation | Manager, professional, and administrators | 33 (1.8) | 1,767 (98.2) | 0.0006 |
 | Clerks | 21 (1.8) | 1,158 (98.2) |  |
 | Service and sales workers | 31 (1.6) | 1,855 (98.4) |  |
 | Skilled agricultural, forestry, and fishery workers | 17 (2.8) | 593 (97.2) |  |
 | Craft, equipment, machine operating, and assembling workers | 55 (3.9) | 1,358 (96.1) |  |
 | Elementary workers | 20 (2.1) | 930 (97.9) |  |
 | Unemployed | 73 (2.3) | 3,090 (97.7) |  |