Figure 1.

Distribution of plasma α-Gal A activities for all patients tested (n=1453) in increments of 1 nmol/h per milliliter, plotted against the number of patients with activity in each interval (observed range of activity 1.3–88.3 nmol/h per milliliter; median activity 7.0 nmol/h per milliliter [5.9–8.4 nmol/h per milliliter]). Each interval in the x axis scale refers to the range beginning with the minimum value, but not including the minimum value and extending up to the maximum value. For example, 1–2 means the range beginning at 1, but not including 1 and containing the values up to 2. In 47 patients, the activity was ≤4.0 nmol/h per milliliter, the low cutoff for the test; the median activity in these 47 patients was 3.4 nmol/h per milliliter (2.9–3.9 nmol/h per milliliter). α-Gal A, α-galactosidase A.