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Table 2 Distribution and reliability scores for CU-Q2oL

From: Psychometric properties of the portuguese version of the chronic urticaria quality of life questionnaire (CU-Q2oL)

CU-Q2oL

# of items

Mean ± sd

Floor effect

Ceiling effect

Internal consistency α

1-week Test-retest ICC

Overall score

23

25.4 ± 19.7

4.3

0.0

0.947

0.910

Pruritus

2

40.6 ± 28.8

15.4

5.6

0.829

0.818

Swelling

2

15.6 ± 22.8

0.0

1.3

0.796

0.711

Impact on life activities

6

18.3 ± 20.7

27.2

0.6

0.869

0.862

Sleep problems

5

33.4 ± 25.5

11.9

0.6

0.899

0.866

Limits

3

27.5 ± 23.9

18.8

1.9

0.661

0.929

Looks

5

22.6 ± 24.2

23.1

0.6

0.842

0.957

  1. sd standard deviation