Satisfactory results of a psychometric analysis and calculation of minimal clinically important differences of the World Health Organization quality of life-BREF questionnaire in an observational cohort study with lung cancer and mesothelioma patients

Table 3 Multi-trait/Multi-item item-domain correlation for the WHOQOL-BREF (n = 153)

Items/domains	Description	Physical Health	Psychological Health	Social Relationships	Environment
Physical Health
3R	Pain	.53^a	.41	.20	.35
4R	Medication	.40^a	.24	.01	.21
10	Energy	.57^a	.53	.13	.42
15	Sleep	.27^a	.32	.06	.27
16	Activities	.72^a	.56	.17	.46
17	Work	.70^a	.54	.17	.43
25	Mobility	.61^a	.47	.24	.45
Psychological Health
5	Positive feelings	.52	.67^a	.33	.47
6	Spirituality	.34	.53^a	.24	.36
7	Cognitions	.44	.48^a	.20	.48
11	Body image	.32	.34^a	.30	.45
18	Self esteem	.60	.58^a	.38	.49
26R	Negative feelings	.43	.52^a	.21	.43
Social Relationships
19	Personal relations	.16	.30	.43^a	.47
20	Sex	.15	.31	.32^a	.31
21	Social support	.16	.28	.43^a	.42
Environment
8	Safety & security	.46	.57	.36	.60^a
9	Physical environment	.12	.35	.31	.38^a
12	Finance	.23	.29	.26	.30^a
13	Information	.24	.33	.36	.53^a
14	Leisure	.41	.34	.19	.46^a
22	Home environment	.46	.55	.41	.56^a
23	Health/social care	.36	.41	.32	.41^a
24	Transport	.39	.44	.43	.57^a

Abbreviations: SD standard deviation, n number of patients, QoL Quality of Life, WHOQOL-BREF World Health Organization Quality of Life-BREF questionnaire
^aPearson item-scale correlations corrected for overlap
Correlations in bold represent correlations between items and domains that differ more than two standard errors from their correlations with their own domains

ISSN: 1471-2407