The questionnaire holds 109 items covering demographic characteristics, in addition to six main domains (i.e. work station, body posture, break time, job control, job demands and social support) assessing potential physical and psychosocial risk factors.
Even so, the retrospective nature of the questionnaire holds the risk that the GPs may have misinterpreted the date of first presentation of symptoms for some of the cases.
Finally, 16 respondents took part in the study, with 9 self-completing the questionnaire, while telephone or Skype interviews guided by the questionnaire were held with 7 respondents.
A questionnaire was held among participants regarding provided feedback and the self-perceived laparoscopic skills improvement.
Also, the STB interview and questionnaire are held preferably at the same day for one respondent, whereas in the PYS there was a gap of six months between these interviews.
To avoid applying preconceived ideas of local institutions, we used a qualitative interview approach described by e.g. Kvale [36] rather than a predefined questionnaire, and held semi-structures open-ended interviews with a checklist.
Researchers interviewed 237 people using a structured questionnaire and held four focus group discussions and 44 in-depth interviews.
The order of questionnaires was held constant, but patients entered the sequence at different points starting with either the paper or touch screen version.
