Further, those in a given diagnostic category at 3M-P generally fell into that same category on a greater number of follow-up time points than those who were not in that category at 3M-P (see Table 2); again, the only exception was that 3M-P GAD-only did not differ from 3M-P GAD + MDD in number of follow-up time points diagnosed with GAD-only. The gene discussed is GAD1; the disease is major depressive disorder.