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. Author manuscript; available in PMC: 2024 Jan 4.
Published in final edited form as: Am J Geriatr Psychiatry. 2023 Jun 15;31(12):1077–1087. doi: 10.1016/j.jagp.2023.06.002

FIGURE 2.

FIGURE 2.

Box plot of estimated change (index scores deciles) compared to empirical change in NPI-apathy after 6 months of treatment with methylphenidate. The figure shows index score deciles representing the model-based prediction of response on the NPI-A. Deciles 1−2 suggest a better response to methylphenidate, while deciles 3−9 suggest relatively little difference between methylphenidate and placebo, and decile 10 suggests a worse response on methylphenidate compared to placebo. Participant characteristics by decile group are included in Table 2.