Association of levels of alcohol exposure with preterm birth, Born in Bradford study 2007–2010
| Alcohol consumption and time period | Number of women | Number of preterm births | Unadjusted | p Value | Fully adjusted | p Value | ||
|---|---|---|---|---|---|---|---|---|
| OR | 95% CI | OR | 95% CI | |||||
| Before pregnancy | ||||||||
| Abstinent | 7672 | 397 | 1.00 | 1.00 | ||||
| Low–moderate | 516 | 32 | 1.21 | 0.83 to 1.76 | 0.31 | 1.14 | 0.74 to 1.78 | 0.552 |
| Binge (occasional) | 1896 | 106 | 1.08 | 0.87 to 1.35 | 0.47 | 1.16 | 0.84 to 1.62 | 0.368 |
| Binge (frequent) | 762 | 50 | 1.29 | 0.95 to 1.74 | 0.1 | 1.10 | 0.71 to 1.71 | 0.678 |
| Missing data | 5 | 0 | ||||||
| All binge | 2658 | 156 | 1.14 | 0.94 to 1.38 | 0.31 | 1.14 | 0.83 to 1.56 | 0.408 |
| First trimester | ||||||||
| Abstinent | 9183 | 483 | 1.00 | 1.00 | ||||
| Low–moderate | 667 | 47 | 1.36 | 1.00 to 1.86 | 0.05 | 1.30 | 0.89 to 1.91 | 0.173 |
| Binge (occasional) | 737 | 33 | 0.84 | 0.59 to 1.21 | 0.36 | 0.68 | 0.44 to 1.06 | 0.091 |
| Binge (frequent) | 236 | 19 | 1.58 | 0.98 to 2.54 | 0.62 | 1.20 | 0.64 to 2.26 | 0.575 |
| Missing data | 28 | 3 | ||||||
| All binge | 973 | 52 | 1.02 | 0.76 to 1.36 | 0.91 | 0.81 | 0.55 to 1.18 | 0.268 |
| Second trimester | ||||||||
| Abstinent | 9589 | 516 | 1.00 | 1.00 | ||||
| Low–moderate | 923 | 52 | 1.05 | 0.78 to 1.41 | 0.75 | 0.90 | 0.63 to 1.28 | 0.553 |
| Binge (occasional) | 297 | 14 | 0.87 | 0.50 to 1.50 | 0.61 | 0.73 | 0.39 to 1.37 | 0.325 |
| Binge (frequent) | 36 | 3 | 1.6 | 0.49 to 5.22 | 0.44 | 1.10 | 0.29 to 4.09 | 0.889 |
| Missing data | 6 | 0 | ||||||
| All binge | 333 | 17 | 0.95 | 0.58 to 1.55 | 0.83 | 0.79 | 0.44 to 1.4 | 0.419 |