Table 1.
Sample size of participants for each validity and reliability test.
Table 2.
Scale for representativeness, relevancy, clarity, and necessity of questionnaire items.
Fig 1.
A sample of the questionnaire on patient acceptance of orthodontic retainers.
The scale is 10 cm in length. The extent of patient discomfort is measured from the left end of the scale to the vertical line placed by the patient.
Table 3.
Content validity results.
Table 4.
Content validity results for revised questionnaire items.
Table 5.
Subject demographics for face validity, n = 35.
Table 6.
Exploratory factor analysis.
Table 7.
Test-retest reliability and internal consistency results.