Table 3.
Variable | n | OR | 95% CI | p | ||
---|---|---|---|---|---|---|
Lower | Upper | |||||
Delivery year | 7919 | 1.03 | 1.01 | 1.04 | < 0.01 | |
Maternal age at delivery (continuous variable) | 7746 | 0.95 | 0.94 | 0.96 | < 0.01 | |
Maternal age at delivery | < 20 | 859 | 2.01 | 1.47 | 2.77 | < 0.01 |
20 - 24 | 1888 | 1.66 | 1.25 | 2.22 | < 0.01 | |
25 - 29 | 2334 | 1.11 | 0.83 | 1.48 | 0.48 | |
30 - 34 | 1723 | 0.68 | 0.49 | 0.94 | 0.02 | |
> = 35 (reference) | 942 | 1.00 | - | - | - | |
IMD* score at booking (continuous variable) | 7878 | 1.01 | 1.00 | 1.01 | < 0.01 | |
IMD* score at booking (quintiles) | 1 (most affluent (reference)) | 1475 | 1.00 | - | - | - |
2 | 1555 | 1.02 | 0.76 | 1.36 | 0.94 | |
3 | 1621 | 1.13 | 0.85 | 1.49 | 0.40 | |
4 | 1594 | 1.33 | 1.01 | 1.75 | 0.04 | |
5 (most deprived) | 1633 | 1.52 | 1.16 | 1.99 | < 0.01 |
* IMD = Index of multiple deprivation