Table 1: Maternal baseline characteristics measured at (or before) date of antenatal booking/enrolment.

¹Either Health Board level or smaller geographical area such as Community Health Partnership level or where a recruitment area was defined by travel time

²Derived by Electronic Data Research and Innovation Service (eDRIS)

SMR: Scottish Morbidity Record

A. FNP Clients eligibility criteria	B. Eligibility criteria applied to fields within SMR 02 dataset to identify Controls
1. Living in an FNP-recruiting NHS Health Board	Postcode at antenatal booking mapped onto each FNP recruiting area1
2. First time mothers-to-be (women are eligible if a previous pregnancy resulted in a miscarriage, stillbirth or termination)	No previous live birth
3. Aged 19 years or younger at time of last menstrual period (LMP)	Derived variable2 based on date of birth and date of LMP
4. Less than 28+6 weeks gestation at enrolment into FNP	Gestation at booking date (derived variable2 based on date of booking and date of LMP)
Exclusion criteria
5. Mother-to-be will relinquish baby at birth	Not measurable at recruitment – minimal risk to numbers
6. Moving outside of the FNP catchment area before programme end	Not measurable at recruitment – minimal risk