TABLE 2

Results of Decision Tree Analysis^*

	Cost (£)			Survival (life years)			Cost-effectiveness (£/life year)
Parameter	Treat all	Imaging	Basic supportive care	Treat all	Imaging	Basic supportive care	Treat all	Imaging	Basic supportive care	ICER (£) for treat all vs. imaging
Baseline prevalence	6,283	5,047	3,210	0.78	0.76	0.43	8,093	6,678	7,408	60,051
Lower 95% CI	6,283	4,918		0.74	0.72		8,475	6,804		73,860
Upper 95% CI	6,283	5,202		0.82	0.80		7,678	6,542		46,795
SPECT sensitivity
Lower 95% CI	6,283	4,980		0.78	0.74		8,055	6,729		31,000
Upper 95% CI	6,283	5,120		0.78	0.77		8,055	6,649		110,800
SPECT specificity
Lower 95% CI	6,283	5,180		0.78	0.76		8,055	6,815		52,500
Upper 95% CI	6,283	5,011		0.78	0.76		8,055	6,593		60,500
Chemotherapy cost
Lower limit	3,700	3,729		0.78	0.76		4,744	4,907		−1,450
Upper limit	18,700	11,529		0.78	0.76		24,087	15,256		348,407
SPECT cost doubled
Lower limit	3,700	3,994		0.78	0.76		4,766	5,285		−14,324
Upper limit	18,700	11,794		0.78	0.76		24,087	15,606		335,530