We used a thematic approach to analyse the interviews, and descriptive statistics to evaluate questionnaire responses.
Table 4 Total evaluated questionnaires for each country Experts Total evaluated questionnaires with consistency ratio < 0.1 DE IT UK S.&AP.
A quantitative method was chosen, thus comprising a significant sample of evaluated questionnaires.
When evaluating questionnaires, criterion and content validation is frequently used[ 29, 33].
Vaillancourt et al. evaluated questionnaires regarding resuscitations that were sent to EMS organizations and county governments in Canada.
Studies evaluating questionnaires in languages other than English were excluded, unless the questionnaire was originally developed in another language and later translated to English.
The telephone interviews used evaluated questionnaires integrated into the interview software and available as computer screen masks (Oracle™ Forms 6.0 as graphic front-end).
Within-person correlation in the reference instrument will reduce the correlation with the evaluated questionnaires and should be corrected for in validation studies [ 50].
In total, N=10,008 interviews, representative of the population of Greece in terms of gender, age, and area, based on the most recent census (ELSTAT, 2011) were performed using the structured evaluated questionnaire.
The thus evaluated questionnaire will be used in the WIDA study.
