Table 1.
Baseline characteristics of the study subjects according to work schedule in the JACC Study
| Daytime work | Permanent nighttime work | Rotating shift work | |
|---|---|---|---|
| (N = 18781) | (N = 1083) | (N = 2360) | |
| Age (Yr) | 52.2 ± 7.4 | 52.0 ± 7.2 | 50.4 ± 7.2 |
| Body mass index (kg/m2) | 22.9 ± 3.7 | 23.2 ± 2.8 | 23.1 ± 2.7 |
| History of diabetes (%) | 4.9 | 3.5 | 4.3 |
| History of cholelithiasis (%) | 3.2 | 2.9 | 3.3 |
| Current smokers (%) | 54.6 | 54.5 | 57.5 |
| Current drinkers (%) | 77.7 | 72.4 | 75.4 |
| High perceived stress in daily life (%) | 23.2 | 23.8 | 30.4 |
| Job type (%) | |||
| Office work | 20.0 | 6.6 | 14.1 |
| Manual work | 52.0 | 64.4 | 48.9 |
| Sleep time (Hr) | 7.4 ± 1.0 | 7.3 ± 1.0 | 7.1 ± 1.0 |
Plus minus values are mean ± standard devidation
The percentages do not add up to 100 % due to missing values