Table 3

Multivariate quantile regression model for predicting C-peptide percentiles (coefficient and its 95% CI)

25th percentile 50th percentile75th percentile
Estimate95% CIEstimate95% CIEstimate95% CI
Basal C-peptide
 HLA (low vs. high risk)0.00−0.150.150.10−0.020.220.10−0.130.33
 IAA titer0.000.000.000.000.000.000.000.000.00
 BMIZ percentile (<85.0 vs. ≥85.0)−0.24−0.33−0.16−0.31−0.43−0.19−0.55−0.72−0.38
 Age (4–8 vs. 9–18 years)−0.34−0.43−0.25−0.40−0.48−0.33−0.60−0.72−0.48
Stimulated C-peptide
 Sex (female vs. male)0.580.27 0.890.500.100.900.790.371.20
 HLA (low vs. high risk)0.26−0.090.600.26−0.290.810.27−0.661.20
 IAA titer0.000.000.000.000.000.000.000.000.00
 BMIZ percentile (<85.0 vs. ≥85.0)−1.00−1.32−0.68−1.05−1.54−0.56−1.85−2.32−1.39
 Age (4–8 vs. 9–18 years)−1.28−1.52−1.04−1.50−1.89−1.10−1.90−2.29−1.52