Table 1.

Overview of intervention and health service use costing.

	Resources used	Currency for valuation	Data sources
Intervention costs
Set-up costs	Hiring costs, training, materials, IT purchases	Total annual costs	Study's accounting data, financial report
Overhead costs	Space, data access and storage, IT maintenance	Total annual costs
In-reach
Lunch and learn	Time of presenters and attendants. Mostly GPs and nurses.	Unit cost of health professionals (£/hour)	Service Caseloads (quantity), PSSRU (unit costs)b
Multidisciplinary team case-planning	Time of presenters and attendants. Mostly GPs and nurses.
Visits	Time of healthcare providers. GPs and paediatricians.
Triage	Time of healthcare providers. GPs, paediatricians, and nurses
Specialist-nurse led servicea
Visits	Time of healthcare providers. Nurses, mental health professionals, pharmacists	Unit cost of health professionals (£/hour)	Service Caseloads (quantity), PSSRUb (unit costs)
Specialist team training	Time of healthcare providers. Nurses and mental health professionals
Multidisciplinary team case-planning	Time of presenters and attendants. Mostly GPs and nurses.
Population health management	Time of staff conducting call -recall and designing promotional materials	Total annual costs	Study's accounting data, financial report
Healthcare utilisation
Primary care	Primary care visits. Costing based on provider type (nurse, GP, etc.) and consultation type (face-to-face, telephone, home, or electronic)	Unit cost of health professionals (£/hour)	Primary care electronic records (quantity), PSSRUb (unit costs)
Secondary care	Hospital admissions, outpatient attendances, emergency department visits	HRGs and TFCs	Secondary care electronic records (quantity), National Tariffc (unit costs)
Referrals to social care services	Referrals from primary care to social care.	Cost of 1 episode of social services support for children	Primary care electronic records (quantity), PSSRUd (unit costs)

^aThe cost of 6 mobile phones (including device and data plan) was also included in the total costs of the specialist-nurse led service. HRGs, Healthcare Resource Groups; TFCs, Treatment Function Codes.

^bCurtis L, Burns A. Unit Costs of Health and Social Care 2020. Personal Social Services Research Unit; 2020 | PSSRU.

^cNHS England. 2019/20 National Tariff Payment System.

^dCurtis LA, Burns A. Unit Costs of Health and Social Care 2014. Personal Social Services Research Unit; 2014 | PSSRU.