Measures
The telephone survey was based on a questionnaire used in a previous study (We assessed COVID-related experiences among all survey participants by asking whether the pandemic affected their economic situation, mental health, and physical well-being. Responses were on a 3-point Likert scale (large effect, small effect, no effect). To assess the influence of the COVID-19 pandemic, participants who reported using the kit were asked whether the COVID pandemic influenced their decision to participate in the trial. Those who indicated that the pandemic affected their decision were asked, ‘In what way did the COVID-19 pandemic affect your participation in this trial?’ After thoroughly reading the recorded responses, the responses were coded using a grounded theory approach (