Table 2b.

Exploratory factor analysis – pattern matrix

K-10 items	Factor
	Depression	Anxiety	Physical
1. In the past 4 weeks, about how often did you feel tired for no good reason?	0.435
2. In the past 4 weeks, about how often did you feel nervous?		0.551
3. In the past 4 weeks, about how often did you feel so nervous that nothing could calm you down?		0.618
4. In the past 4 weeks, about how often did you feel hopeless?	0.856
5. In the past 4 weeks, about how often did you feel restless or fidgety?		0.794
6. In the past 4 weeks, about how often did you feel so restless that you could not sit still?		0.878
7. In the past 4 weeks, about how often did you feel depressed?	0.954
8. In the past 4 weeks, about how often did you feel that everything was an effort?	0.689
9. In the past 4 weeks, about how often did you feel so sad that nothing could cheer you up?	0.772
10. In the past 4 weeks, about how often did you feel worthless?	0.872
EQ-5D-5L items
1. Mobility			0.871
2. Self-care			0.583
3. Usual activities			0.713
4. Pain/discomfort			0.675
5. Anxiety/depression	0.650

Note. Loadings below 0.30 are not shown. Rotation method: promax with Kaiser normalisation.

K-10, Kessler Psychological Distress Scale.