Table 1

Consent and participation

Age of CYP referred to CAMHSCYP aged <11CYP aged 11–15CYP aged 16–17
Initial contact withParent/carerDepends on contact details provided with the CAMHS referral*
Consent provided byParent/carerParent/carerParent/carerCYP AND parent/carer (optional)CYP
Assent provided byNoneCYP (optional)NoneNoneNone
Participant(s)Parent/carer onlyCYP and parent/carer dyadParent/carer onlyCYP and parent/carer dyadCYP only
Primary participant†Parent/carerParent/carerParent/carerCYPCYP
Secondary participantNoneCYPNoneParent/carerNone
DAWBA completed byParent/carerParent/carer AND
CYP
Parent/carerCYP AND parent/carerCYP
Research questionnaires completed byParent/carer report on CYP
Parent/carer self-report
Parent/carer report on CYP
Parent/carer self-report
CYP self-report
Parent/carer report on CYP
Parent/carer self-report
CYP self-report Parent/carer report on CYP
Parent/carer self-report
CYP self-report
  • For all CYP aged <16 the initial contact about the study will be with the parent/carer. The involvement of CYP aged 11–15 will be at the discretion of the parent/carer.

  • *For CYP aged 16–17 if the CYP’s contact details are provided on the CAMHS referral the first contact about the study will be with the CYP who can choose to nominate a parent/carer to participate in the trial alongside them or participate alone. If the parent/carer’s contact details only are available the first contact will be with the parent/carer and the parent/carer will be asked whether the CYP can also be contacted but may choose to refuse this. The parent/carer will not be able to participate in the STADIA trial without the involvement or consent of the CYP.

  • †The primary participant is the person who must provide consent as a minimum requirement in order for randomisation to take place. Assent (of CYP aged 11–15) and parental consent (for CYP aged 16 and 17) may also be sought but is not mandatory and therefore will not be required prior to randomisation.

  • CAMHS, Child and Adolescent Mental Health Services; CYP, children and young people; DAWBA, Development and Well-Being Assessment; STADIA, STAndardised DIagnostic Assessment for children and adolescents with emotional difficulties.