Table 1.
Selected characteristics of the nurses and midwives in the cross-sectional study
| Day-workers n = 359 |
Rotating shifts workers n = 349 |
p | |
|---|---|---|---|
| Age, years | 50.2 ± 5.3 (40.1–61.1) | 48.3 ± 5.2 (39.5–60.2) | <0.0001 |
| BMI, kg/m2 | 27.1 ± 4.7 (18.5–48.3) | 27.1 ± 4.6 (16.4–45.2) | 0.98 |
| Total night shift work, years | 12.4 ± 8.3 (0–37.3) | 26.6 ± 7.3 (4.6–42.3) | <0.0001 |
| Total night shift work (categories) | |||
| <5 years | 76 (21.2) | 0 | 0.0001 |
| 6–15 years | 147 (40.9) | 30 (8.6) | |
| >15 years | 136 (37.9) | 319 (91.4) | |
| Current night shift work frequency per month | |||
| <2 nights | 2 (0.58 %) | ||
| 2–4 nights | 19 (5.44 %) | ||
| 5–8 nights | 320 (91.69 %) | ||
| >8 nights | 8 (2.29 %) | ||
| Smoking | |||
| Never smokers | 146 (41.8 %) | 155 (43.0 %) | 0.02 |
| Past smokers | 81 (23.2 %) | 110 (30.6 %) | |
| Current smokers | 122 (35.0 %) | 95 (26.4 %) | |
| Menopausal status | |||
| Pre- | 185 (51.5 %) | 225 (65.7 %) | <0.0001 |
| Post- | 174 (48.5 %) | 124 (34.3 %) | |
| Current oral contraceptives or sex hormone use | |||
| Yes | 89 (24.8 %) | 80 (23.0 %) | 0.513 |
| No | 270 (75.2 %) | 269 (77.0 %) | |