Table 4.
Logistic regression analyses with severe and frequent RLS/WED as the dependent variable among shift working nurses in Norway (n = 1,788).
| Independent variables (n in crude analyses) | Crudea OR (95% CI) | Adjustedb OR (95% CI) n = 1,700–1,728 | Adjustedc OR (95% CI) n = 1,650–1,696 |
|---|---|---|---|
| Sex | |||
| Female (1,579) | 1.00 | ||
| Male (176) | 0.77 (0.42–1.41) | ||
| Age (1,752) | 1.04 (1.03–1.06) | ||
| Married/cohabiting | |||
| No (451) | 1.00 | ||
| Yes (1,301) | 1.11 (0.75–1.64) | ||
| Smoking | |||
| No (1,590) | 1.00 | ||
| Yes (156) | 2.00 (1.24–3.23) | ||
| Cups of caffeine daily (1,752) | 1.12 (1.06–1.19) | ||
| Shift work disorder | |||
| No (1,192) | 1.00 | ||
| Yes (531) | 1.93 (1.37–2.72) | 1.94 (1.37–2.73) | 1.94 (1.37–2.74) |
| Work schedule | |||
| Day only (210) | 1.00 | 1.00 | 1.00 |
| Two-shift (577) | 1.06 (0.62–1.80) | 1.11 (0.65–1.92) | 1.06 (0.61–1.83) |
| Night only (136) | 0.52 (0.21–1.25) | 0.60 (0.24–1.46) | 0.50 (0.20–1.23) |
| Three-shift (751) | 0.84 (0.49–1.42) | 0.98 (0.57–1.68) | 0.92 (0.54–1.59) |
aIn the crude regression analyses, each independent variable was entered separately. Age and cups of caffeine were entered as continuous variables.
bAdjusted for sex and age.
cAdjusted for sex, age, marital status, smoking, and use of caffeine.
Significant values are shown in bold.
RLS/WED, restless legs syndrome/Willis–Ekbom disease.