Table 2 Descriptive statistics for relevant explanatory and outcome variables, BCS 1970
N | % | N | % | ||
|---|---|---|---|---|---|
Explanatory variables | |||||
Area of residence (aged 5) | |||||
England | 11157 | 90.5 | GCV | 377 | 30.2 |
Scotland | 1166 | 9.5 | Merseyside | 420 | 33.7 |
Gr. Manchester | 450 | 36.1 | |||
Social class of father | |||||
Class 1 & 2 | 1942 | 15.8 | Class 1 & 2 | 130 | 10.4 |
Class 3 | 6907 | 56.0 | Class 3 | 716 | 57.4 |
Class 4 & 5 | 2402 | 19.5 | Class 4 & 5 | 325 | 26.1 |
Missing | 1072 | 8.7 | Missing | 76 | 6.1 |
Low birth weight | |||||
Not LBW | 11215 | 91.0 | Not LBW | 1135 | 91.0 |
LBW | 753 | 6.1 | LBW | 78 | 6.3 |
Missing | 355 | 2.9 | Missing | 34 | 2.7 |
Mother’s education | |||||
Some qualifications | 5224 | 42.4 | Some qualifications | 468 | 37.5 |
No qualifications | 6559 | 53.2 | No qualifications | 707 | 56.7 |
Missing | 540 | 4.4 | Missing | 72 | 5.8 |
Housing tenure | |||||
Owner occupied | 6974 | 56.6 | Owner occupied | 644 | 51.6 |
Rented | 5314 | 43.1 | Rented | 601 | 48.2 |
Missing | 35 | 0.3 | Missing | 2 | 0.2 |
Age of mother at birth of child | |||||
20+ | 10866 | 88.2 | 20+ | 1117 | 89.6 |
Under 20 | 1027 | 8.3 | Under 20 | 106 | 8.5 |
Missing | 430 | 3.5 | Missing | 24 | 1.9 |
Smoking during pregnancy | |||||
Non smoker | 7100 | 57.6 | Non smoker | 610 | 48.9 |
Smoker | 4810 | 39.0 | Smoker | 618 | 49.6 |
Missing | 413 | 3.4 | Missing | 19 | 1.5 |
Ever breastfed | |||||
No | 7575 | 61.5 | No | 885 | 71.0 |
Yes | 4631 | 37.6 | Yes | 355 | 28.5 |
Missing | 117 | 0.9 | Missing | 7 | 0.6 |
Maternal mental health | |||||
Low-moderate malaise | 9881 | 80.2 | Low-moderate malaise | 950 | 76.2 |
High malaise | 2197 | 17.8 | High malaise | 270 | 21.7 |
Missing | 245 | 2.0 | Missing | 27 | 2.2 |
Dad helps mum put child to bed | |||||
Yes | 10805 | 87.7 | Yes | 646 | 51.8 |
No | 1192 | 9.7 | No | 548 | 43.9 |
Missing | 326 | 2.6 | Missing | 53 | 4.3 |
Who read to child in last week | |||||
Someone | 10805 | 87.7 | Someone | 1062 | 85.2 |
No one | 1192 | 9.7 | No one | 153 | 12.3 |
Missing | 326 | 2.6 | Missing | 32 | 2.6 |
Missing | Missing | ||||
Outcome variables | |||||
Rutter scores | |||||
Normal | 9416 | 76.4 | Normal | 944 | 75.7 |
Moderate-severe | 2260 | 18.3 | Moderate-severe | 248 | 19.9 |
Missing | 647 | 5.3 | Missing | 55 | 4.4 |
Respiratory problems | |||||
No | 9823 | 79.7 | No | 1028 | 82.4 |
Yes | 2475 | 20.1 | Yes | 215 | 17.2 |
Missing | 25 | 0.2 | Missing | 4 | 0.3 |
Vocabulary problems | |||||
No | 11000 | 89.3 | No | 1112 | 89.2 |
Yes | 1323 | 10.7 | Yes | 135 | 10.8 |