By performing a standardised interview most patients are found to give correct information on their history of substance abuse [ 20].
We will try to maximize the response rate by performing a personal interview with each patient, in which QOL and satisfaction with care questionnaires will be completed.
By performing an NGT instead of interviews, we gave the panellists the possibility not only to answer our questions, but to discuss their different views with other healthcare professionals.
Nevertheless, we have assessed that the recall error is within an acceptable extent by performing a reliability check with repeated interviews by telephone on a random sample of 235 cases 3 weeks after the initial interview on average.
Fieldwork supervisors carried out quality control by performing phone interviews with a reduced sample comprising 10% of the participants.
8 19 We tested the questionnaire by performing cognitive interviews with 12 cancer patients and a pilot study of 953 cancer patients at a single hospital.
We collected data by performing semi-structured interviews, participant observations, and from process artifacts.
Screen-positive patients will enter the diagnostic phase and will be contacted by telephone to perform a diagnostic interview.
Patients who gave informed consent were contacted by telephone by a research assistant to perform a diagnostic interview.
The psychological variables were: emotional control and intellectual capacity were assessed by trained military psychologist who performed a structured interview with all conscripts.
