Table 1.

Approach to thematic qualitative data analysis

Phase	Description
1. Familiarising with data	ED and KW read and re-read transcripts noting down initial ideas on themes.
2. Generating initial codes	Two complementary data-coding frameworks were developed (one focus group data (KW) and one interview data (ED)) using a priori codes identified from the project proposal and topic guilds. During the familiarisation stage ED and KW identified additional data-driven codes and concepts not previously captured in the initial coding frame.
3. Developing the coding framework	KW coded 10% of the interview transcripts using the initial coding frame and made notes on any new themes identified and how the framework could be refined. In turn, ED coded 10% of the focus group transcripts following the same procedure.
4. Defining and naming themes	Following review and reconciliation revised coding frames were subsequently developed and ordered into themes.
5. Completion of coding of transcripts	ED completed coding interview transcripts and KW completed coding focus group transcripts in preparation for write-up.
6. Producing the report	ED and KW developed the original manuscript using themes to relate back to the study aims ensuring key findings and recommendations were relevant to the FEVER trial design and site staff training (ie, catalytic validity). Final discussion and development of selected themes occurred during the write-up phase.