Fig. 4From: Latent class distributional regression for the estimation of non-linear reference limits from contaminated data sourcesReference intervals for hemoglobin concentration. Shaded areas represent the estimated distribution of healthy hemoglobin concentration enclosed by the 2.5% and 97.5% quantiles for boys (left) and girls (right) represented by colored solid lines, whereas the dashed lines result from fitting separate models for boys and girls. Black solid lines show solutions from an alternative approach estimated by splitting the population into multiple subgroupsBack to article page