Table A2.

Area under the curve values (AUC) for models containing only a linear term for age and cubic polynomials for age. Model parameters were estimated with the training set and applied to an independent test set. AUC values were calculated for the All Ages Model applied to all test set records, children (0-18 years old) only, adults (18-60 years old) only and seniors (≥ 60 years old) only and compared to results for models developed using training set records for the specific age groups.

Model	Linear Age Effect	Cubic Polynomial Age
All Ages Linear Model
All Ages	0.947	0.951
Children only	0.952	0.963
Adults only	0.933	0.935
Seniors only	0.896	0.894
Children-specific Model	0.969	0.967
Adult-specific Model	0.935	0.933
Senior-specific Model	0.896	0.895