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Table 3 The COREQ checklist

From: CASPER plus (CollAborative care in Screen-Positive EldeRs with major depressive disorder): study protocol for a randomised controlled trial

Item Description
Domain 1: Research team and reflexivity  
Interviewer Researchers KB and KO will conduct the interviews
Credentials of interviewers KB MSc Environmental Epidemiology and Policy
KO MA English Literature
Occupation of interviewers Researchers based in Department of Health Sciences, Seebohm Rowntree Building, University of York, Heslington, York YO10 5DD, UK
Gender of interviewers Female
Training and experience Researchers conducting interviews have undergone basic training in qualitative methods, and will be closely supervised and mentored by CCG/SG
Relationship with patients Researchers may have conducted a baseline interview with patients prior to qualitative interview, or may not have met or spoken to the interview participant before
Participant knowledge of the interviewer The research and purpose of the interview will be explained as part of the consent process with the participant
Interviewer characteristics Interviewers conducting the qualitative study are members of the research team for the CASPER Plus study, thus potentially biased in their view of the intervention and trial
Domain 2: Study design  
Theoretical framework The qualitative exploration has some a priori assumptions; an initial thematic analysis using principles of constant comparison will be followed by analysis using the Normalisation Process Theory [42] in order to explore how the intervention might be incorporated into routine practice
Sampling of participants A purposive sample of patient participants will be invited to be interviewed, ensuring variation in age (65 to 79 years and 80+ years), gender, research site. We invite patients who have completed the intervention and those who decline to participate in the trial and those who have ‘dropped out’
All CMs will be invited to be interviewed
All GPs in participating practices will be invited to be interviewed, and sampling will ensure a mix of age, years in practice, gender, demography and size of practice
Method of approach Potential patient participants were invited by mail which included a letter, information leaflet and consent form
CMs were approached either directly or by email with information leaflet and consent form
GPs were contacted by email or letter, with attached information leaflet and consent form
Sample size Sample size of CM data set will be limited by number of CMs in the trial
Interviews with patient participants and GPs will continue until category saturation is achieved in each data set
Non-participation We will record how many potential participants who were invited declined to participate
Setting CMs and GPs will be interviewed in their place of work
Patient participants will be offered a choice of venue for the interview: home visit, GP practice, university office, other venue of their choice
Presence of non-participants For patient participants, it is possible that spouses or carers may be present during the interviews
Domain 3: Data collection  
Interview guide The interview guide will be developed by the research team with reference to their previous work, the wider literature and through discussion of the study’s aims and objectives
Repeat interviews No repeat interviews are planned
Recording Interviews will be audio-recorded, downloaded and transcribed (anonymising the data at this point). The digital recording will be deleted
Field notes Field notes will be kept by the interviewers, and discussed in research meetings. These notes will contribute to modification of the interview guide and to data analysis
Duration A record of the duration of each interview will be kept
Data saturation Interviews will be conducted until data saturation is achieved in each data set
Transcripts returned We do not plan to send the transcripts to participants for comment
Domain 4: Analysis and findings  
Number of data coders Three researchers (KO, KB, CCG) will conduct data coding, with discussion of the coding at regular research meetings
Description of the coding tree We do not plan to publish a description of the coding tree
Derivation of themes Some of the themes will be a priori themes, anticipated from the wider literature; we anticipate that new themes will emerge from analysis of the data, specific to this age group of patients
Software Software will not be used to organise the data
Participant checking We anticipate that there may be occasional instances when we need to re-contact the participant to clarify some point in the transcript
Reporting - Quotations We will use illustrative data extracts to support our findings
Data consistency We will look for dis-confirmatory evidence as we conduct interviews and analysis. We will result such evidence
Clarity of major themes We will present the major themes in any publications
Clarity of minor themes We will present minor themes and dis-confirmatory evidence in our outputs, particularly in report to HTA