Translation and Validation of Rating-of-Fatigue Scale to be Used in Nonsurgical Endodontic Re-treatment.

Background: This study aimed to translate and validate the rating-of-fatigue (ROF) scale in the Kannada language.

Methods: This current study involved two steps, where forward translation, backward translation, cross-cultural adaptation, and test of a pre-final version of the ROF scale were conducted in the first step. Content validity, face validity, and construct validity of the ROF scale were performed in five stages.