We added a validation question to the questionnaire, which took the following form: "Knowing what your hip or knee replacement surgery did for you, would you still have undergone this surgery?", with dichotomous answers of 'yes' vs 'no'no
We developed an ACASI questionnaire with identical questions to the structured questionnaire used for the FtF- interview.
Parental history of asthma was assessed by adding questions to the ISAAC questionnaire.
In June 2012, we conducted a pre-test survey to affirm the validity of the sample and reconstructed the wording of our questions to ensure the questionnaire (Additional file 1) was clear and user-friendly.
It is not be feasible to add new questions to the upcoming fieldwork future questionnaire or to the fieldworker training due to the overall small number of cases.
"The addition of a citizenship question to the census questionnaire is a direct attack on our representative democracy," Holder said in a statement. .
All patients were asked the above questions according to the questionnaire.
Each study year, the new questions added to the questionnaire were pretested in a sample of schoolchildren.
In Phase 2, response processes validity was assessed by examining respondents': (1) responses to the three questions added to the questionnaire on ease in responding, relevance, and clarity of the ACT, and (2) additional comments.
Differences in the patterns of responses to questions in the questionnaire related to satisfaction between the three clinical groups were evaluated by χ2 and Fisher's exact tests (α = 5%).
