Table 2 Questions of the third survey

Usability

15 Questions

27

How satisfied were you with the usability of the digital questionnaire?

8.79 ± 1.34

19

I was able to complete the questionnaire in peace.

2.95 ± 0.21

13

I felt confident to be able filling out the digital questionnaire.

2.86 ± 0.35

06

The answers to the questions worked perfectly from a technical point of view.

2.88 ± 0.39

07

The time to complete the questionnaire was just right.

2.81 ± 0.42

25

I was completely satisfied with the colour representation of the digital questionnaire.

2.79 ± 0.63

20

I always knew exactly where to click to answer the questions.

2.65 ± 0.73

16

* I was afraid to damage / drop the device.

2.62 ± 0.86

11

The font was legible.

2.99 ± 0.11

12

* The font size was too small.

2.83 ± 0.60

01

* The tablet was difficult for me to use.

2.83 ± 0.58

04

* The questionnaire sometimes reacted slowly.

2.84 ± 0.57

10

The handling of the device was easy for me.

2.88 ± 0.32

14

I feel confident to be able filling out another digital questionnaire in the same format.

2.87 ± 0.37

18

* I would rather have filled out a paper and pen version of the questionnaire.

2.59 ± 0.80

Content

8 questions

05

The questionnaire was clearly structured.

2.79 ± 0.51

17

I had no problems understanding the questions, even if there were medical terms.

2.38 ± 0.94

08

* I had difficulty in understanding the questions.

2.40 ± 0.97

21

I always knew what the questions were about.

2.62 ± 0.62

26

Unknown terms, if any, were explained.

2.62 ± 0.74

09

The questions seemed appropriate and conclusive to me.

2.83 ± 0.51

03

The questionnaire helped to present my medical concerns.

2.44 ± 0.78

15

I had the impression that the questionnaire helped to sort my thoughts.

1.63 ± 1.12

Privacy

1 question

02

I rate the data protection and data security of the questionnaire as high.

2.40 ± 0.71

Overall impression

3 questions

24

My overall impression is quite positive.

2.68 ± 0.63

23

* I would not recommend the digital questionnaire.

2.56 ± 0.86

22

I would like to have a digital questionnaire again in the future.

2.48 ± 0.84