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Table 2 Data quality, acceptability and internal consistency of COVID-19 health literacy questionnaire (CHL-Q)

From: Measuring COVID-19 health literacy: validation of the COVID-19 HL questionnaire in Spain

CHL-Q items

Mean

Median

SD

Skewness

Min

Max

Floor effect %

Ceiling effect %

Item-total corrected correlation

Cronbach’s alpha if item deleted

1. Find information about symptoms of COVID-19

3.24

3.00

0.76

− 0.81

1

4

2.6

41.1

0.60

0.86

2. Find out about political decisions on restrictions related to coronavirus/COVID-19

3.11

3.00

0.76

− 0.58

1

4

2.9

32.0

0.66

0.85

3. Find out what to do in case you suspect you have COVID-19

3.05

3.00

0.78

− 0.57

1

4

3.8

29.5

0.61

0.85

4. Understand what authorities say about the coronavirus/ COVID-19

2.95

3.00

0.89

− 0.52

1

4

7.3

30.0

0.64

0.85

5. Understand what authorities say about coronavirus/ COVID-19 restrictions and recommendations

3.14

3.00

0.80

− 0.68

1

4

3.6

36.5

0.68

0.85

6. Judge if the information about coronavirus/COVID-19 in the media is reliable

2.58

3.00

0.92

− 0.06

1

4

12.8

17.2

0.49

0.87

7. Judge when you need to go to the doctor for non-COVID-19 related problems

2.91

3.00

0.82

− 0.29

1

4

4.2

25.9

0.58

0.86

8. Follow the recommendations on how to protect yourself from coronavirus/COVID-19

3.27

3.00

0.72

− 0.77

1

4

2.0

40.9

0.64

0.85

9. Decide when to stay at home from social activities/ work/school, and when not to

3.04

3.00

0.80

− 0.51

1

4

3.7

30.9

0.58

0.86

CHL-Q index

33.90

33.33

9.40

− 0.42

0

50

0.6

6.2

0.87*

  1. *Cronbach’s alpha the full scale