Demographic Variable | Frequencies |
---|---|
N (%) | |
Sex | |
 Male | 7601 (51·08) |
 Female | 7280 (48·92) |
Social economic status | |
 Manual | 2808 (18·87) |
 Non-manual | 9398 (63·15) |
 Missing | 2676 (17·98) |
Ethnicity | |
 Non-white | 609 (4·09) |
 White | 11,468 (77·06) |
 Missing | 2805 (18·85) |
Mother Parity | |
 Primipari | 5770 (38·77) |
 Multipari | 7154 (48·07) |
 Missing | 1958 (13·16) |