Table 2.
Demographics of Samples Included in this Study and Overall ALSPAC Sample
| Demographics | In this study (%) | ALSPAC (%) |
|---|---|---|
| Sex | ||
| Male | 3,984 (47.8) | 7,573 (51.5) |
| Female | 4,354 (52.2) | 7,121 (48.5) |
| Ethnicity | ||
| Non-White | 905 (10.8) | 3,034 (20.1) |
| White | 7,443 (89.2) | 12,068 (79.9) |
| Social class-mother | ||
| Professional | 461 (7.0) | 596 (5.9) |
| Managerial & technical | 2,250 (34.3) | 3,180 (31.4) |
| Skilled: nonmanual | 2,773 (42.2) | 4,326 (42.8) |
| Skilled: manual | 440 (6.7) | 791 (7.8) |
| Partly skilled | 536 (8.2) | 997 (9.9) |
| Unskilled | 102 (1.6) | 221 (2.2) |
| Armed forces | 2 (<0.1) | 4 (<0.1) |
| Social class-father | ||
| Professional | 900 (12.9) | 1,205 (10.9) |
| Managerial & technical | 2,504 (35.9) | 3,749 (34.0) |
| Skilled: nonmanual | 830 (11.9) | 1,199 (10.9) |
| Skilled: manual | 1,988 (28.5) | 3,464 (31.4) |
| Partly skilled | 583 (8.4) | 1,078 (09.8) |
| Unskilled | 163 (2.3) | 316 (02.9) |
| Armed forces | 11 (0.2) | 28 (0.3) |
| Highest education-mother | ||
| Nondegree | 7,154 (85.5) | 13,586 (89.4) |
| Degree | 1,218 (14.5) | 1,607 (10.6) |
| Highest education-father | ||
| Nondegree | 6,540 (80.1) | 12,531 (85.2) |
| Degree | 1,620 (19.9) | 2,181 (14.8) |