Table 6 continued
Pregnancy and delivery information
A dummy that takes value 1 if the child is a female; a dummy
that takes value 1 if the child is a twin; mother’s age at birth; an
indicator variable that takes value 1 if the mother had a
cesarean section; the length of the gestation period.
Health variables
Dummy variables for different physical health levels; number of
cigarettes smoked each day measured at 32 weeks of
pregnancy; number of alcoholic beverages a day before
pregnancy; and antenatal EPDS measured at 18 and 33 months
pregnancy.
Interpersonal relationships, personality, and stressful life events
Dragona’s et al. (1992) measure of the mother’s social network
availability; Quinton and Rutter’s (1988) aggression and
affection scores for marital quality; a psychological measure of
the mother’s personality: the adult version of the NowickiStrickand
locus of control scale (Duke and Nowicki, 1973);
Barnett et al.’s (1983) Life Events Score; an indicator variable
that takes the value 1 if pregnancy was unplanned; an indicator
variable that takes value 1 if the mother was in local authority
care; an indicator variable that takes value 1 if she had
divorced parents by age 17; an indicator variable that takes
value 1 if the mother’s main carer died by age 17;