Pregnancies | Daytime work n (%) | Fixed evening work n (%) | Fixed night work n (%) | Rotating shift work (without night) n (%) | Rotating shift work (with night) n (%) |
---|---|---|---|---|---|
The numbers in parentheses represent percentages. | |||||
†One woman contributed two pregnancies during the study period. | |||||
*p<0.05 and **p<0.01, χ2 test, compared with daytime workers. | |||||
Total | 24605 | 809 | 290 | 2334 | 2429 |
The second pregnancies† | 184 (0.7) | 7 (0.9) | 1 (0.3) | 21 (0.9) | 17 (0.7) |
Endometriosis | 68 (0.3) | 2 (0.2) | 1 (0.3) | 6 (0.3) | 9 (0.4) |
Ovarian or cervical cancer | 18 (0.1) | 0 (0.0) | 0 (0.0) | 3 (0.1) | 0 (0.0) |
Partly planned | 2136 (8.7) | 85 (10.5) | 27 (9.3) | 223 (9.6) | 237 (9.8) |
Unplanned | 3078 (12.5) | 167 (20.6)** | 56 (19.3)** | 365 (15.6)** | 344 (14.2)* |
Treatment for infertility | 1590 (6.5) | 55 (6.8) | 28 (9.7)* | 144 (6.2) | 157 (6.5) |
Final study pregnancies | 17531 (71.2) | 493 (60.9) | 177 (61.0) | 1572 (67.4) | 1665 (68.5) |