Table 1 General characteristics of the study subjects
N | % | |
|---|---|---|
Sex | ||
Male | 17346 | 58.4 |
Female | 12365 | 41.6 |
Age (years) | ||
<30 | 4904 | 16.5 |
30-39 | 8919 | 30.0 |
40-49 | 8534 | 28.7 |
50-59 | 5019 | 16.9 |
≥60 | 2335 | 7.9 |
Level of education completed | ||
Middle school or below | 3320 | 11.2 |
High school | 11600 | 39.0 |
College or above | 14791 | 49.8 |
Monthly income (Korean won) | ||
<1,000,000 | 3780 | 12.7 |
1,000,000 – 2,000,000 | 11825 | 39.8 |
2,000,000 – 3,000,000 | 8058 | 27.1 |
≥3,000,000 | 6041 | 20.3 |
Smoking | ||
Non-smoker | 16318 | 54.9 |
Ex-smoker | 3266 | 11.0 |
Current smoker | 10127 | 34.1 |
Alcohol drinking frequency (drinks) | ||
None | 6924 | 23.3 |
≤1 per week | 7634 | 25.7 |
≥2 per week | 15153 | 51.0 |
Job type | ||
White collar | 12149 | 40.9 |
Service | 6827 | 23.0 |
Blue collar | 10735 | 36.1 |
Company size (no. of employees) | ||
<5 | 7591 | 26.3 |
5-49 | 14478 | 50.2 |
50-299 | 4724 | 16.4 |
≥300 | 2052 | 7.1 |
Years of service | ||
<1 | 4519 | 15.2 |
1-9 | 18091 | 60.9 |
≥10 | 7101 | 23.9 |
Shift work | ||
No | 26872 | 90.4 |
Yes | 2839 | 9.6 |
Working time (hours/week) | ||
<40 | 2970 | 10.0 |
40-48 | 15521 | 52.2 |
49-60 | 8571 | 28.9 |
≥61 | 2649 | 8.9 |
Hypertension | ||
No | 28248 | 95.1 |
Yes | 1463 | 4.9 |
Obesity | ||
No | 29158 | 98.1 |
Yes | 553 | 1.9 |
Cardiovascular diseases | ||
No | 29376 | 98.9 |
Yes | 335 | 1.1 |
Night work | ||
No | 25999 | 87.5 |
Yes (≥1 day/month) | 3712 | 12.5 |