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Table 2 Frequency responses for items of the WHOQOL-BREF

From: 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

Items/domains Description n Mean (SD) Floor effect (%) Ceiling effect (%) Scale pointsa
1 2 3 4 5
General facet
  Overall QoL 150 5.9 (1.8) 4 (2.7) 3 (2.0) 3.3 14.4 24.2 44.4 12.4
  General Health      21.6 35.9 26.1 13.1 2.6
Physical Health
 3 Pain 153 12.9 (3.1) 1 (0.7) 1 (0.7) 28.1 28.8 19.0 20.3 3.3
 4 Medication      11.8 26.8 25.5 24.8 10.5
 10 Energy      3.9 19.6 35.9 25.5 14.4
 15 Sleep      8.5 23.5 26.1 26.1 15.0
 16 Activities      7.8 34.6 24.8 26.8 5.9
 17 Work      12.4 39.2 21.6 20.3 6.5
 25 Mobility      4.6 11.8 13.1 35.3 35.3
Psychological Health
 5 Positive feelings 153 14.4 (2.5) 0 (0.0) 2 (1.3) 3.9 7.8 39.2 41.2 7.8
 6 Spirituality      2.6 5.2 32.7 43.8 15.0
 7 Cognitions      4.6 9.8 44.4 22.2 19.0
 11 Body image      0.7 4.6 28.1 26.1 39.9
 18 Self esteem      0.7 9.8 30.7 43.8 13.7
 26 Negative feelings      14.4 32.7 43.1 9.8 0.0
Social Relationships
 19 Personal relations 153 16.2 (2.6) 0 (0.0) 20 (13.1) 0.7 0.7 6.5 40.5 50.3
 20 Sex      5.9 13.7 36.6 24.8 16.3
 21 Social support      0.7 1.3 9.2 34.0 54.9
Environment
 8 Safety & security 153 15.9 (2.3) 0 (0.0) 1 (0.7) 0.7 3.9 26.8 32.0 36.6
 9 Physical environment      0.7 2.0 26.8 35.3 34.0
 12 Finance      2.0 6.5 37.3 21.6 32.0
 13 Information      0.0 0.7 36.6 37.3 24.8
 14 Leisure      3.9 13.1 24.2 35.3 23.5
 22 Home environment      2.6 5.2 12.4 39.9 39.9
 23 Health/social care      1.3 2.0 15.7 49.0 32.0
 24 Transport      1.3 2.0 9.2 43.8 43.8
  1. Abbreviations: WHOQOL-BREF World Health Organization Quality of Life-BREF questionnaire, n number of patients, SD standard deviation, QoL quality of life
  2. aValues are given in percentages
  3. Values in bold represent skewed distributions of the frequency of responses of patients