At baseline , GADA affinities ranged from 1.9 10 ( 7 ) to 5.0 10 ( 12 ) L/mol ( median 2.8 10 ( 10 ) L/mol ) and were correlated with GADA titers ( r = 0.47 ; P = 0.0009 ) , fasting ( r = -0.37 ; P = 0.01 ) and stimulated ( r = -0.40 ; P = 0.006 ) C-peptide concentrations , and HbA1c ( r = 0.39 ; P = 0.007 ) .