|  |  | Sleep disturbance |  | |||
---|---|---|---|---|---|---|---|
 | N | % | No | (%) | Yes | (%) | p-value* |
Total | 7112 | 100.0 | 6876 | 96.7 | 236 | 3.3 | Â |
Gender | Â | Â | Â | Â | Â | Â | Â |
 Female | 2928 | 41.2 | 2833 | 96.8 | 95 | 3.2 | 0.771 |
 Male | 4184 | 58.8 | 4043 | 96.6 | 141 | 3.4 |  |
Age | Â | Â | Â | Â | Â | Â | Â |
 <30 | 1481 | 20.8 | 1442 | 97.4 | 39 | 2.6 | 0.524 |
 30-39 | 2057 | 28.9 | 1985 | 96.5 | 72 | 3.5 |  |
 40-49 | 1880 | 26.4 | 1812 | 96.4 | 68 | 3.6 |  |
 50-59 | 1155 | 16.2 | 1118 | 96.8 | 37 | 3.2 |  |
 ≥60 | 539 | 7.6 | 519 | 96.3 | 20 | 3.7 |  |
Educational status | Â | Â | Â | Â | Â | Â | Â |
 Middle school or below | 973 | 13.7 | 936 | 96.2 | 37 | 3.8 | 0.047 |
 High school | 2966 | 41.7 | 2886 | 97.3 | 80 | 2.7 |  |
 College or above | 3172 | 44.6 | 3053 | 96.2 | 119 | 3.8 |  |
Smoking | Â | Â | Â | Â | Â | Â | Â |
 Non-smoker | 3884 | 54.6 | 3751 | 96.6 | 133 | 3.4 | 0.847 |
 Ex-smoker | 697 | 9.8 | 674 | 96.7 | 23 | 3.3 |  |
 Smoker | 2531 | 35.6 | 2451 | 96.8 | 80 | 3.2 |  |
Drinking frequency | Â | Â | Â | Â | Â | Â | Â |
 None | 1938 | 27.3 | 1891 | 97.6 | 47 | 2.4 | 0.026 |
 ≤1 per week | 2965 | 41.7 | 2862 | 96.5 | 103 | 3.5 |  |
 ≥2 per week | 2208 | 31.1 | 2122 | 96.1 | 86 | 3.9 |  |
Employment status | Â | Â | Â | Â | Â | Â | Â |
 Regular | 4568 | 64.2 | 4430 | 97.0 | 135 | 3.0 | 0.061 |
 Temporary | 2544 | 35.8 | 2446 | 96.1 | 98 | 3.9 |  |
 Job type |  |  |  |  |  |  |  |
 White collar | 3081 | 43.3 | 2966 | 96.3 | 115 | 3.7 | 0.006 |
 Service | 1350 | 19.0 | 1324 | 98.1 | 26 | 1.9 |  |
 Blue collar | 2680 | 37.7 | 2586 | 96.5 | 94 | 3.5 |  |
Number of employees | Â | Â | Â | Â | Â | Â | Â |
 <5 | 1526 | 22.3 | 1474 | 96.6 | 52 | 3.4 | <0.001 |
 5-49 | 3295 | 48.4 | 3210 | 97.4 | 85 | 2.6 |  |
 50-299 | 1315 | 19.3 | 1246 | 94.8 | 69 | 5.2 |  |
 ≥300 | 689 | 10.0 | 667 | 96.8 | 22 | 3.2 |  |
Tenure (yr) | Â | Â | Â | Â | Â | Â | Â |
 <1 | 1477 | 20.8 | 1431 | 96.9 | 46 | 3.1 | 0.764 |
 1-9 | 4084 | 57.4 | 3943 | 96.5 | 141 | 3.5 |  |
 ≥10 | 1550 | 21.8 | 1501 | 96.8 | 49 | 3.2 |  |
Working time (hr/wk) | Â | Â | Â | Â | Â | Â | Â |
 <40 | 1105 | 15.5 | 1083 | 98.0 | 22 | 2.0 | <0.001 |
 40-48 | 3801 | 53.5 | 3697 | 97.3 | 104 | 2.7 |  |
 49-60 | 1624 | 22.8 | 1562 | 96.2 | 62 | 3.8 |  |
 ≥61 | 581 | 8.2 | 533 | 91.7 | 48 | 8.3 |  |
Shift work | Â | Â | Â | Â | Â | Â | Â |
 No | 6337 | 89.1 | 6153 | 97.1 | 184 | 2.9 | <0.001 |
 Yes | 774 | 10.9 | 722 | 93.3 | 52 | 6.7 |  |
Hypertension | Â | Â | Â | Â | Â | Â | Â |
 No | 6622 | 93.1 | 6412 | 96.8 | 210 | 3.2 | 0.011 |
 Yes | 490 | 6.9 | 464 | 94.7 | 26 | 5.3 |  |
Obesity | Â | Â | Â | Â | Â | Â | Â |
 No | 6885 | 96.8 | 6667 | 96.8 | 218 | 3.2 | <0.001 |
 Yes | 226 | 3.2 | 209 | 92.5 | 17 | 7.5 |  |
Depressive symptoms | Â | Â | Â | Â | Â | Â | Â |
 No | 6999 | 98.4 | 6811 | 97.3 | 188 | 2.7 | <0.001 |
 Yes | 113 | 1.6 | 65 | 57.5 | 48 | 42.5 |  |