Table 4.

T tests comparing pairs of health states differing in treatment administration attributes (N = 182)

Comparison	Hepatitis C health states	TTO with 10-year time horizon			TTO with 1-year time horizon
		Mean utilitya	Mean (SD) difference score	P valueb	Mean utilitya	Mean (SD) difference score	P valueb
A vs B	A. 1 tablet per day	0.80	0.00 (0.01)	0.32	0.81	0.00 (0.01)	0.32
	B. 2 tablets per day	0.80			0.81
A vs C	A. 1 tablet per day	0.80	0.00 (0.02)	0.059	0.81	0.00 (0.02)	0.041
	C. 3 tablets per day	0.79			0.80
A vs D	A. 1 tablet per day	0.80	0.01 (0.04)	0.0036	0.81	0.01 (0.06)	0.0032
	D. 7 tablets per day	0.79			0.79
B vs C	B. 2 tablets per day	0.80	0.00 (0.01)	0.045	0.81	0.00 (0.02)	0.071
	C. 3 tablets per day	0.79			0.80
B vs D	B. 2 tablets per day	0.80	0.01 (0.03)	0.0026	0.81	0.01 (0.06)	0.0043
	D. 7 tablets per day	0.79			0.79
C vs D	C. 3 tablets per day	0.79	0.01 (0.03)	0.0036	0.80	0.01 (0.05)	0.0068
	D. 7 tablets per day	0.79			0.79
D vs E	D. 7 tablets per day	0.79	0.02 (0.05)	<0.0001	0.79	0.02 (0.07)	0.0002
	E. 7 tablets per day + weekly injection	0.77			0.77
E vs F	E. 7 tablets per day + weekly injection	0.77	0.02 (0.06)	0.0002	0.77	0.02 (0.07)	0.0005
	F. 12 tablets per day + weekly injection	0.75			0.76
E vs H	E. 7 tablets per day + weekly injection	0.77	0.07 (0.16)	<0.0001	0.77	0.05 (0.13)	<0.0001
	H. 18 tablets per day + weekly injection	0.71			0.72
F vs H	F. 12 tablets per day + weekly injection	0.75	0.05 (0.13)	<0.0001	0.76	0.04 (0.09)	<0.0001
	H. 18 tablets per day + weekly injection	0.71			0.72
F vs G	F. 12 tablets per day + weekly injection	0.75	0.04 (0.16)	0.0005	0.76	0.04 (0.17)	0.0024
	G. 12 tablets per day (taken with fatty food) + weekly injection	0.71			0.72

^aTTO scores are on a scale anchored with 0 representing dead and 1 representing full health

^b P values are based on t tests comparing two utility means