[Validity and utility of self-perceived need for dental treatment by adults and elderly].

This study aimed to determine the validity of self-rated measures as an indicator of dental treatment needs in adults and the elderly. The sample consisted of individuals that participated in the National Oral Health Survey and the Survey on Oral Health Conditions in Minas Gerais State. Self-rated needs for dental treatment and total prostheses were compared to need based on dental examination, defined as the gold standard. The quality of measures was assessed by sensitivity, specificity, and predictive values. Sensitivity varied from 51% to 90%, and specificity from 56% to 90%. Positive predictive values were 11% to 95% and negative predictive values were 23% to 99%. Self-rated need for dental treatment in adults and for total prostheses in the elderly showed acceptable validity. Meanwhile, self-rated need for dental treatment in the elderly and for total prostheses in adults were not considered useful, due to their low performance.