Table 1.
Frequency and percentages of maternal variables by linkage to the Scottish Maternity Records (SMR 2) and questionnaire response: females in the Children of the 1950's Study.
| SOURCE | ||||||||||||
| SMR 2 (N = 5634) Sent for linkage | Questionnaire (n = 5540) Attempted mailings | |||||||||||
| Responded | No response | |||||||||||
| Maternal characteristics | Linked | Not linked | No children | One or more children | Total | |||||||
| n | (%) | n | (%) | n | (%) | n | (%) | n | (%) | n | (%) | |
| Place of residence in 2003a | ||||||||||||
| Aberdeen | 3147 | (84) | 1052 | (56) | 368 | (72) | 2540 | (78) | 2908 | (78) | 1314 | (73) |
| Scotland, not Aberdeen | 336 | (9) | 166 | (9) | 68 | (13) | 319 | (10) | 387 | (10) | 120 | (7) |
| UK, not Scotland | 93 | (2) | 429 | (23) | 64 | (13) | 347 | (11) | 411 | (11) | 184 | (10) |
| Emigrated from UK | 36 | (1) | 97 | (5) | 1 | (0.2) | 7 | (0.2) | 8 | (0.2) | 1 | (0) |
| Other/dead/not traced | 131 | (3) | 147 | (8) | 8 | (2) | 30 | (1) | 38 | (1) | 169 | (9) |
| Paternal occupation at her own birthb | ||||||||||||
| Non-manual | 885 | (24) | 531 | (28) | 187 | (37) | 872 | (27) | 1,059 | (28) | 352 | (20) |
| Manual | 2579 | (69) | 1207 | (64) | 295 | (58) | 2176 | (67) | 2,471 | (66) | 1239 | (69) |
| Other/missing | 279 | (7) | 153 | (8) | 27 | (5) | 195 | (6) | 222 | (6) | 197 | (11) |
| Total | 3743 | (100) | 1891 | (100) | 509 | (100) | 3243 | (100) | 3752 | (100) | 1788 | (100) |
aStatus at National Health Service central Register in 2003
bAccording to occupational status of participant's father at the time of the Reading survey in 1962