Table 4.
Mean gestational age for women with spontaneous deliveries in the autumn exposure and primary control periods*
| Comparison unit | Exposure period |
Comparison period |
p Value | ||
|---|---|---|---|---|---|
| Number of deliveries | Mean gestational age (SD) in days | Number of deliveries | Mean gestational age (SD) in days | ||
| Whole week | 19 149 | 279.1 (12.5) | 38 214 | 279.0 (12.6) | 0.59 |
| Sunday | 2722 | 279.0 (12.3) | 5404 | 279.0 (12.1) | 0.96 |
| Monday | 2835 | 279.2 (12.4) | 5721 | 279.1 (12.3) | 0.65 |
| Tuesday | 2715 | 279.0 (12.8) | 5558 | 279.2 (12.3) | 0.65 |
| Wednesday | 2703 | 279.3 (12.2) | 5536 | 279.1 (12.9) | 0.49 |
| Thursday | 2804 | 279.1 (12.5) | 5365 | 279.0 (13.4) | 0.67 |
| Friday | 2687 | 278.8 (13.0) | 5508 | 279.0 (13.0) | 0.51 |
| Saturday | 2683 | 279.3 (12.5) | 5122 | 279.0 (12.5) | 0.33 |
*Only deliveries with data on gestational age are included.