In phase 3, new items were established based on these proposals.
A total of 189 items were established and distributed according to selected constructs.
Afterward, operational definitions are accordingly be provided for each of the variables and the measurement items are established.
The psychometric properties of the final version with 34 Likert-scale items were established on 173 patients across 4 domains, which the authors named Enhancers, Detractors, Location, and Cost.
The answers offered by the participants were then recorded and the number of times a response was offered in an item was established.
Secondly, the members of each group were divided into higher and lower ability groups of 27% each, separately for the structure and reading sections, and a discrimination index (DI) for each item was established based on the number of correct answers in the upper group, less the number correct in the lower group, the product being divided by the participants in each of the higher and lower groups.
Furthermore, the mortality relationship of each SRH item was established by directly comparing the items whilst accounting for shared variance with other SRH items and health covariates.
Only through extensive field testing could the psychometric properties (primarily difficulty and discrimination) of each item be established.
The S-DAI with 9 items, which was established by Stouthard et al. [ 21], was also used to assess physical reactions, thoughts and behavioral aspects of dental fear experienced by the individual [ 22].
