Prioritisation of patients on waiting lists for hip and knee arthroplasties and cataract surgery: Instruments validation

Table 2 Instruments and constructs included in the convergent and discriminant analysis

	Surgical priority instruments
	Hip/Knee arthroplasty		Cataract surgery
Instruments	Convergent	Discriminant	Convergent	Discriminant
Doctors' opinions (VAS)	Yes	No	Yes	No
Patients' perceptions on difficulty	Yes	No	Yes	No
WOMAC	Yes	No	No	No
VF-14	No	No	Yes	No
HUI3¹	-Overall score -Pain, Ambulation	Vision, Emotion, Dexterity, Hearing, Cognition	-Overall score -Vision, Ambulation	Pain, Emotion, Anxiety/depression, Dexterity, Hearing, Cognition
EQ-5D	-Overall score -Pain, Daily activities, Mobility, Self-care	Anxiety/depression	-Overall score -Daily activities, Mobility	Pain, Anxiety/Depression, Self-care

VAS: visual analogue scale; WOMAC: Western Ontario McMaster Osteoarthritis Index; VF-14: Visual Function Index VF-14; HUI3: Health Utilities Index Mark 3.
¹ The speech dimension was not included in the analysis as none of the patients had difficulty with it.

ISSN: 1472-6963