Table 4

OR of MS with 95% CI for subjects with different habitual sleep duration

Total
Hours/night ca/co* OR (95% CI)† OR (95% CI)‡ Trend
<7171/1941.4 (1.1 to 1.7)1.4 (1.1 to 1.7)
7–91752/27261.0 (reference)1.0 (reference)
10–152/2441.0 (0.8 to 1.2)1.0 (0.8 to 1.2)0.002
No shift work
Hours/night ca/co* OR (95% CI)† OR (95% CI)‡ Trend
<7146/1721.3 (1.1 to 1.7)1.3 (1.0 to 1.7)
7–91628/25601.0 (reference)1.0 (reference)
10–141/2331.0 (0.8 to 1.2)1.0 (0.8 to 1.2)0.003
  • *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.