3.4. Treatment duration and patient retention
Of the 1200 adult patients prescribed vigabatrin, 807 (67%) had a
TMF submitted. These include patients who had prior experience with
vigabatrin as well as those who were naïve to vigabatrin. The median
duration of vigabatrin therapy for all adult patients during registry
enrollment was 6.4 months.
Although seizure outcome data were not available in the registry,
70% of patients naïve to vigabatrin continued treatment after 3 months
of therapy. Smaller numbers of patients naïve to vigabatrin were enrolled
in the registry for N6 months (N = 906) or N12 months (N =
790); 56% and 42% of patients, respectively, continued therapy at the
6- and 12-month time points in the registry (Fig. 3A).