Martins, A. M. E. de B. L.; Silveira, M. F.; Freitas, C. V. de; Eleutério, N. B.; Oliveira, P. H. A.; Ferreira, R. C. Challenges of a Calibration Process for an Epidemiological Study Involving Quantitative and Ordinal Categorical Variables: One Example. Arq Odontol 2016, 47.