Table 4 Risk of breast cancer associated with exposure to three shiftwork factors when exposure occurred at different windows of time relative to interview
From: The association between different night shiftwork factors and breast cancer: a case–control study
Window of exposure | Exposure during that window | Graveyard shift OR (95% CI) | Light at night OR (95% CI) | Phase shift OR (95% CI) | Sleep disruption OR (95% CI) |
|---|---|---|---|---|---|
⩽10 years ago | No | 1.0 | 1.0 | 1.0 | 1.0 |
Yes | 1.02 (0.73–1.43) | 1.25 (0.86–1.80) | 1.23 (0.83–1.83) | 1.10 (0.68–1.79) | |
>10 and ⩽20 years ago | No | 1.0 | 1.0 | 1.0 | 1.0 |
Yes | 1.08 (0.77–1.51) | 0.89 (0.61–1.30) | 0.98 (0.66–1.46) | 0.82 (0.49–1.37) | |
>20 and ⩽30 years ago | No | 1.0 | 1.0 | 1.0 | 1.0 |
Yes | 0.83 (0.60–1.14) | 0.87 (0.62–1.21) | 0.86 (0.61–1.22) | 1.07 (0.67–1.72) | |
>30 years ago | No | 1.0 | 1.0 | 1.0 | 1.0 |
Yes | 1.21 (0.94–1.57) | 1.22 (0.93–1.59) | 1.19 (0.91–1.55) | 1.38 (0.91–2.09) |
