Note: A multivariate analysis suggests that a model that adds clinical and demographic information may perform better than the nomogram alone. (See O'Neill SS et al. Multivariate analysis of clinical, demographic, and laboratory data for classification of disorders of calcium homeostasis. Am J Clin Pathol 2011;135:100. [PMID: 21173131]) Source: Nomograms, Guide to Diagnostic Tests, 7e Citation: Nicoll D, Mark Lu C, McPhee SJ. Guide to Diagnostic Tests, 7e; 2017 Available at: https://accesspharmacy.mhmedical.com/DownloadImage.aspx?image=/data/books/2032/nicoll7_ch10_f008.png&sec=152256233&BookID=2032&ChapterSecID=152256215&imagename= Accessed: November 16, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved