Table 1.

Parent and patient participant characteristics 1

Participant	Gestational age of child or patient	Reason for interest in participating	Feeding method	Single/multiple birth	Incidence of necrotising enterocolitis (NEC)?	Survival of baby(ies)	Support for trial
Parent 1	33+3 weeks	Pharmacist w/RCT experience	Mum’s milk	Single	N	Y	Y
Parent 2	n/a	NEC/preterm charity volunteer	Mum’s milk and formula	Single	Y	Y	N
Parent 3	n/a	Breastfeeding peer supporter	Mum’s milk and formula	Single	N	Y	Y
Parent 4	22 weeks	NEC/preterm charity volunteer	Mum’s milk and donor milk	Twins	N/N	Y/N	Y
Parent 5	33 weeks	n/a	Mum’s milk and fortifier	Single	Y	N	Unsure
Parent 6	29+5 weeks	n/a	Mum’s milk and formula	Twins	Suspected NEC/N	Y/Y	Y
Parent 7	28 weeks	n/a	Mum’s milk and formula	Single	Y	Y	Y
Patient/parent 12	29 weeks	NEC/preterm charity volunteer	Formula and donor milk/formula and donor milk	Single/single	Y/Y	Y/Y	Y
Patient 1	28+4 weeks	Paediatric nurse	Mum’s milk and Formula	Twin	N/suspected NEC	Y/N3	Y