Diagnostic biomarker performance of a multivariate prediction model. A: Receiver operating characteristic curve of cross-validated linear models. Each sample was classified as combined control and seronegative (CO/SN) or new-onset (NO) using a generalized linear model developed without that sample. B: Probability of being classified as NO. Probabilities were determined using a linear model developed on all CO/SN subjects and NO patients. The 10 proteins selected for this model were MH0003_GL0005194, T2D.17A_GL0015017, V1.FI37_GL0010556, galectin-3, MH0133_GL0027226, fibrillin-1, CELA3A, neutral ceramidase, MH0012_GL0028086, and V1.UC30.0_GL0016764. NS, not significant. ***P < 0.001; ****P < 0.0001. SP, seropositive.