a) Correlation between urinary c-peptide per creatinine concentrations measured from controls and after recovery from Salivette synthetic collection devices (Pearson correlation coefficient, rs = 0.93, p<0.001). b)Correlation between urinary c-peptide per creatinine concentrations measured from controls and after recovery from Salivette cotton collection devices (Pearson correlation coefficient, rs = 0.97, p<0.001). c) Correlation between urinary c-peptide per creatinine concentrations measured from controls and after recovery from First aid collection devices (Pearson correlation coefficient, rs = 0.67, p = 0.071).

<p>a) Correlation between urinary c-peptide per creatinine concentrations measured from controls and after recovery from Salivette synthetic collection devices (Pearson correlation coefficient, rs = 0.93, p<0.001). b)Correlation between urinary c-peptide per creatinine concentrations measured from controls and after recovery from Salivette cotton collection devices (Pearson correlation coefficient, rs = 0.97, p<0.001). c) Correlation between urinary c-peptide per creatinine concentrations measured from controls and after recovery from First aid collection devices (Pearson correlation coefficient, rs = 0.67, p = 0.071).