Figure 4. Two-way sensitivity analyses of 6-year cost of MPH-IR vs. natural course of ADHD for A) children and B) adolescents, considering a willingness-to-pay of I$ 11,530. The dark gray area represents the natural cost variability per month, and the light gray area, the MPH-IR cost variability per month. ADHD = attention deficit hyperactivity disorder; MPH-IR = methylphenidate immediate-release.
