Patients were classified into two groups, “first” and “last”. By dividing the number of patients in group, “last” by the number of patients in group, “first”, a crude sequence ratio (SR) can be obtained.
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| Figure 1: General picture of prescription sequence symmetry analysis. Patients were classified into two groups, “first” and “last”. By dividing the number of patients in group, “last” by the number of patients in group, “first”, a crude sequence ratio (SR) can be obtained. |