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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