Moreover, as explained in the Results section, quality control of data eliminated inconsistent questionnaires.
Eleven items presented DIF and were eliminated from the questionnaire.
Eleven items (4, 9, 12, 14, 19, 20, 26, 30, 35, 37 and 43) were located outside the confidence intervals (blue lines), i.e. the ones with DIF, and were eliminated from the questionnaire.
We also examined participants' responses to cognitive interview questions for the terms and pairs that were eliminated from the questionnaire.
Sending out the importance questionnaire enabled us to exclude questions that are considered unimportant by patients and to retain questions that would be eliminated from the questionnaire based on their psychometric properties but were deemed important by patients.
Bias arising from a consistent order of questions within the questionnaire was eliminated by randomising different versions of the questionnaire containing questions in a different order.
One-hundred-and-three queliminatedes were eliminated from the analysis because one or more items on the questionnaire and/or demographic information such as age, gender, or the guardian's relationship to the child was left unanswered.
We collected 133 questionnaires and eliminated incomplete responses from them.
Comparative SRH should not be eliminated from use in questionnaires.
Based on the statistical analysis (Content Validity Index), a total of 12 items were eliminated and the final questionnaire was constructed using 55 items.
