Table 1.
General characteristics of the study participants at baseline according to shift work in 2005.
| Shift Work, n (%) | p-Value * | ||
|---|---|---|---|
| No | Yes | ||
| No. of participants | 3624 (89.6) | 422 (10.4) | |
| Age (years) | 0.0002 | ||
| 15–20 | 36 (76.6) | 11 (23.4) | |
| 21–40 | 2078 (91.1) | 204 (8.9) | |
| 41–60 | 1355 (89.2) | 164 (10.8) | |
| >60 | 155 (78.3) | 43 (21.7) | |
| Sex | <0.0001 | ||
| Male | 2164 (87.7) | 304 (12.3) | |
| Female | 1460 (92.5) | 118 (7.5) | |
| Education level | <0.0001 | ||
| Middle school | 713 (88.9) | 89 (11.1) | |
| High School | 1205 (85.2) | 209 (14.8) | |
| College or higher | 1706 (93.2) | 124 (6.8) | |
| Occupational classification | <0.0001 | ||
| White-collar | 1743 (95.9) | 74 (4.1) | |
| Pink-collar | 478 (86.4) | 75 (13.6) | |
| Green-collar | 10 (100.0) | 0 (0.0) | |
| Blue-collar | 1393 (83.6) | 273 (16.4) | |
| Monthly wage income ($, USD) | 0.0911 | ||
| <1500 | 929 (87.8) | 129 (12.2) | |
| 1500–2000 | 899 (91.2) | 98 (9.8) | |
| 2000–2500 | 668 (91.4) | 63 (8.6) | |
| >2500 | 1128 (89.5) | 132 (10.5) | |
| Self-rated health status | 0.6508 | ||
| Good | 2174 (89.4) | 258 (10.6) | |
| Moderate | 1204 (90.1) | 132 (9.9) | |
| Bad | 246 (88.5) | 32 (11.5) | |
| Smoking status | 0.4557 | ||
| Never or past | 2321 (89.8) | 263 (10.2) | |
| Current | 1303 (89.1) | 159 (10.9) | |
| Drinking status | 0.0696 | ||
| Never or social | 2310 (90.2) | 250 (9.8) | |
| Binge | 1314 (88.4) | 172 (11.6) | |
* Comparison using chi-square test.