Table 1.

Utility values based on severity ranks

Severity rank	Number of studies reporting values	Average utility	Minimum utility	Maximum utility
Unstratified population	71	0.779	0.432	0.940
1	3	0.873	0.869	0.877
2	25	0.807	0.732	0.912
3	15	0.728	0.633	0.832
4	25	0.676	0.551	0.881
5	3	0.548	0.420	0.668