ONS Longitudinal study data: parental characteristics of subjects according to ethnicity of mother and fathera.

aSingleton live births (all gestations) 1975 to 2000.bParity = number of previous live deliveries. Not available for 8849 (7%) subjects whose parents were not married at registration of their birth.c‘Other’ includes occupations inadequately described at the census.dP-values from one-way ANOVA.eP-values from Pearson chi-squared tests.