The AUDIT questionnaire was administrated using computer-assisted self-completion interview (CASI).
Following survey completion, participants were interviewed to assess their interpretation of questions, in particular, the questions associated with hesitation.
Self-completion and interview versions of ASCOT have four response options per item.
Consent for the interview, completion of the interview and the request for blood for HIV testing were performed in sequential stages so that a man who might decline to give blood for HIV could still agree to the interview.
After completion of interviews, a Congolese translator completed translation of all transcripts from French or the local language (Swahili or Mashi) to English.
Following the completion of interviews, a Gonja language specialist was contracted to transcribe all tape-recorded interviews.
The questionnaires were checked for consistency and correctness by the field supervisors on completion of interview.
These readings were taken for each survey round after completion of interviews.
Following the completion of interviews, the data were analysed using the Attride-Stirling thematic network analysis framework [ 41].
Recall bias may have also affected our findings because of delays incurred between onset of illness, laboratory-confirmation of RVF infection, and completion of interviews.
