Platelet responses during the treatment period in all placebo- and romiplostim-treated patients and in patients by age cohort. (A) Median (25th [Q1] and 75th [Q3] percentiles) number of weeks that platelet counts were 50 × 109/L or greater during the treatment period. Platelet counts within 4 weeks of administration of rescue medication were excluded from these analyses. (B) Percent of patients who had platelet counts of 50 × 109/L or greater for 2 consecutive weeks in the absence of rescue medication. (C) Percent of patients who had an increase in platelet counts of 20 × 109/L or greater above baseline for 2 consecutive weeks in the absence of rescue medication.