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Table 4 Descriptive information and Cronbach’s alpha of Skindex-29 and Skindex-16

From: Development and psychometric validation of the Chinese version of Skindex-29 and Skindex-16

 

No. of items (score range)

Mean

SD

Percentile

% floor

% ceiling

Corrected item-total correlation

Cronbach’s α

25

50

75

Chinese version of Skindex-29

Emotions

10(0–100)

49.0

25.0

30.0

50.0

67.5

3.2

0.9

0.63-0.82

0.94

Symptoms

7(0–100)

37.2

21.1

17.9

35.7

53.6

3.2

0.0

0.50-0.67

0.85

Functioning

12(0–100)

36.8

24.6

14.6

35.4

55.2

5.0

0.0

0.56-0.84

0.95

Total

29(0–100)

41.1

22.1

23.7

40.5

55.2

1.4

0.0

0.50-0.83

0.97

Chinese version of Skindex-16

Emotions

7(0–100)

54.4

31.1

28.6

54.8

83.3

2.8

11.1

0.73-0.88

0.94

Symptoms

4(0–100)

36.2

28.2

12.5

29.2

50.0

8.3

3.7

0.62-0.78

0.86

Functioning

5(0–100)

36.1

30.1

6.7

30.0

60.0

15.3

6.5

0.83-0.88

0.94

Total

16(0–100)

44.3

27.2

21.4

42.7

64.6

2.3

2.3

0.60-0.85

0.96

  1. SD, Standard Deviation.