Figure 1. BST levels below 11.4 µg/L suggest two different
subpopulations and reference values as a function of age, and.A , Mathematical
density curves for healthy donors suggesting 2 different subgroups with
a normal distribution by tryptase ranges, a reference population assumed
to have no TPSAB1 duplication and one of which had almost double BST
values (n=655). Medians and percentiles (5th and
95th) of each are also shown. B ,
Polynomial curve (red dashed line) representing the evolution of BST as
a function of age calculated with medians (red dots) for healthy donors
by age categories. The grey area on either side represents a 95%
confidence interval. The median tryptase value of all healthy donors for
whom age was available is also shown (black dashed line). Values with no
associated age have been excluded (n=533).
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