Table 2

Drug exposure

Duration of exposureInitial dose, 400 mg/day (n = 73)Initial dose, 600 mg/day (n = 74)All doses (n = 147)
≤6 months58 (79%)54 (73%)112 (76%)
>6 to ≤12 months15 (21%)20 (27%)35 (24%)
Total73 (100%)74 (100%)147 (100%)