Table 1 Variables created by combining other variables

Any social service input

Social service input described in the maternal clinical events file

Social service input in child clinical file

Financial issues

Financial issues in maternal clinical events file

Financial issues in child clinical file

Any nursing input

Practice nurse involvement with mother in clinical events file

Health visitor involvement recorded in maternal clinical events file

District nurse involvement with mother in clinical events file

Heath Visitor input in child clinical file,

District or Practice nurse input in child clinical file

Any non attendance at primary or secondary care

Maternal non-attendance at primary or secondary care

Maternal non attendance for cervical smear

Any non attendance at primary or secondary care codes in child clinical file

Immunisation data incomplete in child clinical file

Child mental illness codes

ADHD treatment in child prescription file

Hypnotic in child prescription file

Antipsychotic in child prescription file

Referral to Child and Adolescent Mental Health Services in referral file

Child mental illness codes in child clinical file

Child behavioural issues in child clinical file,

Antidepressant in child prescription file.

Maternal mental illness codes

Maternal depression in clinical events file

Maternal prescription of an antidepressant

Maternal bipolar disorder in clinical events file

Maternal prescription for treatment of bipolar disorder

Maternal referral to psychiatry

Maternal mental illness in clinical events file

Concern about maternal psychological health

Maternal prescription of anxiolytic

Maternal psychosis in clinical events file

Maternal prescription of an antipsychotic medication

Maternal alcohol misuse

Maternal alcohol misuse

Maternal prescription for treatment of alcohol misuse

Sentinel conditions for alcohol misuse in maternal file

Maternal drug misuse

Maternal drug misuse in clinical events file

Prescription of treatment for opiod misuse in maternal therapy file

Sentinel conditions for drug misuse in maternal file

Domestic abuse

Domestic abuse in maternal clinical events file

Sentinel conditions for trauma in maternal file

Maternal depression

Maternal depression in clinical events file

Maternal prescription of an antidepressant

Maternal bipolar disorder

Maternal bipolar disorder in clinical events file

Maternal prescription for treatment of bipolar disorder

Maternal psychosis

Maternal psychosis in clinical events file

Maternal prescription of an antipsychotic medication

Maternal contraception

Maternal contraception in clinical events file

Maternal prescription of contraceptive