Table 1. Resource items utilised in RIDD trial.

Resource item	Unit	Source	Reference to source
Direct medical costs related to trial (drug administration)
Success of injection (fully)	ml	BNF	[ 8]
Success of injection (partial)	ml	BNF	[ 8]
Anaesthetic cream	mg	BNF	[ 8]
Other direct medical costs
Inpatient care	visit	NHS Reference cost	[ 9]
Outpatient care
Hand surgery: Surgeon consultation	visit	NHS Reference cost	[ 9]
Hand surgery: Radiotherapy	visit	NHS Reference cost	[ 9]
Hand surgery: Steroid/collagenase injection	visit	NHS Reference cost	[ 9]
Hand surgery: Dressing change	visit	NHS Reference cost	[ 9]
Radiology: Ultrasound scan	visit	NHS Reference cost	[ 9]
Physio- or hand therapy	visit	NHS Reference cost	[ 9]
Emergency department	visit	NHS Reference cost	[ 9]
Primary and community care
General Practitioner	visit	PSSRU	[ 10]
General Practitioner	home visit	PSSRU	[ 10]
General Practitioner	phone call	PSSRU	[ 10]
Practice nurse	hour	PSSRU	[ 10]
Physiotherapist	hour	PSSRU	[ 10]
Occupational therapist	hour	PSSRU	[ 10]
Calls to NHS 111	hour	PSSRU	[ 10]
Medication		BNF	[ 8]
Direct nonmedical cost
Personal social services
Meals on wheels	day	PSSRU	[ 10]
Laundry services	load	North Yorkshire County Council	[ 11]
Social worker	visit	PSSRU	[ 10]
Care worker/ help at home	visit	PSSRU	[ 10]
Missed work		RIDD trial
Travel		RIDD trial
Child care		RIDD trial
Help with housework		RIDD trial
Indirect cost
Income lost		RIDD trial

BNF, British National Formulary; NHS, National Health Service; PSSRU, Personal Social Service Research Unit.