Social class in childhood | | | | |
Non-manual | 202 | 76 | 24 | 1.00 (ref) |
Manual | 1319 | 73 | 27 | 0.85 (0.60 to 1.20) |
Unknown | 59 | 63 | 37 | 0.56 (0.30 to 1.05) |
Birth order | | | | |
First | 486 | 70 | 30 | 1.00 (ref) |
Second | 382 | 73 | 27 | 1.14 (0.85 to 1.54) |
Third | 236 | 74 | 28 | 1.22 (0.86 to 1.74) |
Fourth or more | 466 | 77 | 23 | 1.42 (1.06 to 1.90) |
Unknown | 10 | 70 | 30 | 0.88 (0.22 to 3.49) |
Trend per category of birth order† | | | | 1.12 (1.02 to 1.23) |
Father unemployed | | | | |
No | 745 | 72 | 28 | 1.00 (ref) |
Yes | 587 | 76 | 24 | 1.13 (0.88 to 1.46) |
Unknown | 248 | 69 | 31 | 0.81 (0.59 to 1.12) |
Birth place | | | | |
Caerphilly | 793 | 73 | 27 | 1.00 (ref) |
Other UK | 734 | 73 | 27 | 1.02 (0.81 to 1.28) |
Outside UK | 51 | 88 | 12 | 2.50 (1.05 to 5.97) |
Unknown | 2 | 100 | 0 | – |
Social class in adulthood | | | | |
Non-manual | 539 | 75 | 25 | 1.00 (ref) |
Manual | 1002 | 73 | 27 | 0.88 (0.69 to 1.12) |
Unknown | 39 | 77 | 23 | 1.00 (0.46 to 2.17) |
Smoking history | | | | |
Never | 428 | 71 | 29 | 1.00 (ref) |
Ex smoker | 466 | 78 | 22 | 1.43 (1.06 to 1.95) |
Current smoker | 680 | 72 | 28 | 1.02 (0.78 to 1.33) |
Unknown | 6 | 83 | 17 | 2.02 (0.23 to 17.73) |
Trend per category of smoking† | | | | 0.99 (0.86 to 1.13) |
Age at baseline examination | | | | |
44 to 49 | 571 | 66 | 34 | 1.00 (ref) |
50 to 54 | 493 | 77 | 23 | 1.74 (1.33 to 2.29) |
55 + | 516 | 78 | 22 | 1.85 (1.41 to 2.43) |
Trend per category of age† | | | | 1.38 (1.20 to 1.58) |
| | Mean (SD) | Age adjusted mean difference (95% CI) (breast minus bottle) |
Birth weight, kg | 1079 | 3.74 (0.83) | 3.41 (0.88) | 0.32 (0.21 to 0.44) |