Table 3 Data analysis process

1.1

Manual interview tagging with SolPan coding scheme (Atlas.ti 9.0). Tagging was checked by a second researcher for consistency.

Coding scheme was inductively developed by the SolPan research commons [17] and consistently applied to all interviews

1.2

Automated interview tagging by key word search.

Key words used (in original language): Maske, Mund-Nasen-Schutz, Mund-Nasen-Bedeckung (mask, face nose protection, face nose covering)

2

Extraction of all quotations tagged with the code “FACE MASKS” from the tagging scheme

Export from Atlas.ti into a word document

3

Inductive development of preliminary research questions and data analysis framework (in excel) based on initial familiarization with data

First author (BZ); details presented in Supplementary file 1

4

Data analysis: structuring of data based on analytical framework, analytical memo

Second author (JE); data structuring in excel file, in parallel writing of analytical memo in word file

5

Inductive, descriptive presentation and organization of interview data

First author (BZ) based on JE’s work. See Supplementary file 1 for a more detailed overview

6

Iterative feedback among co-authors

Both written feedback and oral discussions

7

Mapping of descriptive themes with public health ethics framework

Abductive; inductive themes were mapped with existing public health framework. Preliminary research questions were adapted to give the analysis are more narrow and relevant focus. See Supplementary file 1 for more details

8

Iterative feedback among co-authors

Both written feedback and oral discussions