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discrete-event simulation in clinical trials - Institut für Statistik ...

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Use of mixed models <strong>in</strong> CTS<br />

‣ Statistical model used<br />

frequently to conceptual<br />

hierarchical (multilevel) of<br />

repeated measures and <strong>in</strong><br />

PK/PD (Proc MIXED /<br />

NLMIXED <strong>in</strong> SAS).<br />

‣ We can model covariance<br />

structure “between” levels and<br />

“with<strong>in</strong>” levels.<br />

‣ We can calculate <strong>in</strong>dividual<br />

trajetories for any patient<br />

20

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