Table 2.

Bifactor loading matrix of the EORTC QLQ-C30

Items		Quality of life	Physical health
1	Physical function	0.468	0.508
2	Physical function	0.479	0.623
3	Physical function	0.480	0.525
4	Physical function	0.506	0.423
5	Physical function	0.374	0.408
6	Role function	0.597	0.520
7	Role function	0.565	0.524
8	Dyspnea	− 0.569	0.150
9	Pain	− 0.593	0.265
10	Fatigue	− 0.627	− 0.429
11	Insomnia	− 0.566	0.012
12	Fatigue	− 0.718	0.348
13	Appetite loss	− 0.583	0.242
14	Nausea and vomiting	− 0.485	0.341
15	Nausea and vomiting	− 0.373	0.302
16	Constipation	− 0.398	0.090
17	Diarrhea	− 0.356	0.245
18	Fatigue	− 0.688	− 0.415
19	Pain	− 0.679	0.321
20	Cognitive functioning	0.669	0.083
21	Emotional functioning	0.773	0.369
22	Emotional functioning	0.771	0.327
23	Emotional functioning	0.745	0.231
24	Emotional functioning	0.831	0.205
25	Cognitive functioning	0.505	0.111
26	Social functioning	0.695	0.185
27	Social functioning	0.709	0.319
28	Financial difficulties	0.440	0.072
29	Global health status	0.476	0.354
30	Global health status	0.535	0.317

Loading on the general factor and in the group factor (if > 0.40) are printed in bold