Data collection: Patients of both groups will be inter-
viewed according to a semi-structured interview guide by
a study nurse who has not been involved in the interven-
tion. The interview will start with a generic question
about the participants’ experience with their pain man-
agement during the study period (see Table 4). More
focused questions will be asked about their experiences
with the feasibility of the intervention and their view of
the data collection procedures. Interview nurses will be
trained on how to interview patients according to the
interview guide and how to maintain a flow of speech.
Data analysis: The interviews will be audio recorded,
transcribed verbatim and analyzed using qualitative con-
tent analysis as described by Mayring [38]. This will
include a stepwise and systematic processing and reduc-
tion of data leading to a meaningful synopsis. After the
first interview, the project leader will listen to the tapes
and give feedback to the interview nurse. Ongoing tran-
scription and analysis during the recruitment period will
allow adaptation of the interview guide during the study
if necessary.