Table 5 Prevalence of migraineurs among different job-related categories (shift work)

Job involves

shift work

Never/rarely

1 (ref)

-

1 (ref)

-

1 (ref)

-

1 (ref)

-

Sometimes

1.09

[0.85, 1.39]

0.99

[0.74, 1.31]

0.88

[0.57, 1.38]

0.86

[0.55, 1.34]

Usually

1.02

[0.66, 1.59]

1.00

[0.60, 1.67]

0.83

[0.34, 2.01]

0.79

[0.33, 1.92]

Always

1.35

[1.08, 1.68]

1.45

[1.14, 1.83]

1.142

[0.77, 1.69]

1.08

[0.72, 1.61]

Work involves

night shift work

Never/rarely

1 (ref)

-

1 (ref)

-

1 (ref)

-

1 (ref)

-

Sometimes

0.94

[0.65, 1.35]

0.99

[0.66, 1.50]

1.02

[0.60, 1.73]

1.14

[0.62, 2.11]

Usually

1.07

[0.59, 1.95]

1.07

[0.54, 2.13]

0.96

[0.42, 2.19]

0.97

[0.37, 2.58]

Always

1.33

[0.88, 2.03]

1.46

[0.93, 2.31]

0.90

[0.45, 1.80]

1.00

[0.45, 2.18]