Table 1.

The QLU-C10D health state classification system, how it maps to the 13 component items from the QLQ-C30, and the duration attribute included in the discrete choice experiment (DCE) valuation survey [18]

Dimension	Level	Stem	Descriptor	QLQ-C30 item scores
Physical functioninga,b	1	You have…	No trouble taking a long walk outside of the house	Item 2 (long walk) = 1
	2		No trouble taking a short walk outside of the house, but at least a little trouble taking a long walk	Item 3 (short walk) = 1 AND Item 2 ≥ 2
	3		A little trouble taking a short walk outside of the house, and at least a little trouble taking a long walk	Item 3 = 2 AND Item 2 ≥ 2
	4		Quite a bit or very much trouble taking a short walk outside the house	Item 3 ≥ 3 AND Item 2 ≥ 2
Role functioning	1	You are limited in pursuing your work or other daily activities…	Not at all	Item 6 = 1
	2		A little	Item 6 = 2
	3		Quite a bit	Item 6 = 3
	4		Very much	Item 6 = 4
Social functioninga,c	1	Your physical condition or medical treatment interferes with your social or family life…	Not at all	Items 26 AND 27 = 1
	2		A little	Items 26 OR 27 = 2c
	3		Quite a bit	Items 26 OR 27 = 3c
	4		Very much	Items 26 OR 27 = 4c
Emotional functioning	1	You feel depressed…	Not at all	Item 24 = 1
	2		A little	Item 24 = 2
	3		Quite a bit	Item 24 = 3
	4		Very much	Item 24 = 4
Pain	1	You have pain…	Not at all	Item 9 = 1
	2		A little	Item 9 = 2
	3		Quite a bit	Item 9 = 3
	4		Very much	Item 9 = 4
Fatigue	1	You feel tired…	Not at all	Item 18 = 1
	2		A little	Item 18 = 2
	3		Quite a bit	Item 18 = 3
	4		Very much	Item 18 = 4
Sleep	1	You have trouble sleeping…	Not at all	Item 11 = 1
	2		A little	Item 11 = 2
	3		Quite a bit	Item 11 = 3
	4		Very much	Item 11 = 4
Appetite	1	You lack appetite…	Not at all	Item 13 = 1
	2		A little	Item 13 = 2
	3		Quite a bit	Item 13 = 3
	4		Very much	Item 13 = 4
Nausea	1	You feel nauseated…	Not at all	Item 14 = 1
	2		A little	Item 14 = 2
	3		Quite a bit	Item 14 = 3
	4		Very much	Item 14 = 4
Bowel problemsa,c	1	You…	Do not have constipation or diarrhoea at all	Items 16 AND 17 = 1
	2		Have a little constipation or diarrhoea	Items 16 OR 17 = 2c
	3		Have constipation or diarrhoea quite a bit	Items 16 OR 17 = 3c
	4		Have constipation or diarrhoea very much	Items 16 OR 17 = 4c
Duration	1	You will live in this health state for…	1 year, and then die	Not applicable
	2		2 years, and then die	Not applicable
	3		5 years, and then die	Not applicable
	4		10 years, and then die	Not applicable

^aThree dimensions of the QLU-C10D each involve two QLQ-C30 items

^bThe physical functioning dimension includes ‘long walk’ and ‘short walk’ from the QLQ-C30; for the DCE, the levels are determined together, but were presented in the DCE survey separately, as shown in Fig. 1

^cFor social functioning and bowel problems, the QLU-C10D level is determined by the maximum value of the two component items