OR of MS with 95% CI for subjects with different phase shift between work/school days and free days
| Total | ||||
| Mean duration (hours) | ca/co* | OR (95% CI)† | OR (95% CI)‡ | Trend |
| <1 | 1263/1927 | 1.0 (reference) | 1.0 (reference) | |
| 1–3 | 608/914 | 1.0 (0.9 to 1.1) | 1.0 (0.9 to 1.2) | |
| >3 | 204/323 | 1.0 (0.8 to 1.2) | 1.0 (0.8 to 1.2) | 0.5 |
| No shift work | ||||
| Mean duration (hours) | ca/co* | OR (95% CI)† | OR (95% CI)‡ | Trend |
| <1 | 1174/1812 | 1.0 (reference) | 1.0 (reference) | |
| 1–3 | 559/851 | 1.0 (0.9 to 1.1) | 1.0 (0.9 to 1.1) | |
| >3 | 182/302 | 0.9 (0.8 to 1.1) | 1.0 (0.8 to 1.1) | 0.3 |
*Number of exposed cases and controls.
†Adjusted for age, sex, residential area and ancestry.
‡Adjusted for age, sex, residential area, ancestry, smoking, IM history and sun exposure.
IM, infectious mononucleosis; MS, multiple sclerosis.