Table 2

Relevant versus irrelevant severity

	Group 1	Group 2	Group 3
Pain if untreated	Severe	Moderate	Moderate
Pain after treatment	Moderate	None	None
Other independent disability	No	Yes	No
HRQoL if untreated	0.6	0.6	0.8
HRQoL if treated	0.8	0.8	1.0
Benefit from treatment	0.2	0.2	0.2

HRQoL, health-related quality of life.