Attributes	Levels	Variable in Equation (1)	Regression coding
Action you take	Self-care	ActSelf	β1
	Practice nurse	ActNur	β2
	NHS24/NHS Direct	ActNHS	β3
	Pharmacist	ActPhar	β4
	Complementary practitioner	ActComp	β5
	GP	ActGP	β6
Waiting time	0 hours	WaitTime0h	β7
	1 hour	WaitTime1h	β8
	6 hours	WaitTime6h	β9
	1 day	WaitTime1d	β10
	3 days	WaitTime3d	β11
	8 days	WaitTime8d	β12
Time available for consultation/treatment	5 minutes
	10 minutes	Consultation	β13
	20 minutes	Time
	30 minutes
Convenience/availability	Normal working hours only	ConvWork	β14
	Normal working hours and out of hours (evenings and weekends)	ConvAny	β15
Chance of a satisfactory outcome	Poor chance	OutcomePoor	β16
	Fair chance	OutcomeFair	β17
	Good chance	OutcomeGood	β18
	Very good chance	OutcomeVeryGood	β19
Cost, £	1.0
	3.0
	5.0
	7.5	Cost	β20
	15.0
	25.0
	40.0
	75.0