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The next diagram can be thought of as the retrospective view of a trial, the view back from a point in time when a subject’s assignment to an arm is known. In this view, the trial appears as a grid, with an arm represented by a series of study cells, one for each epoch, and a sequence of elements within elements within each study cell. In this example (as in many trials), there is exactly 1 element in each study cell. Later examples will illustrate that In more complicated designs this is not always the case.
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| Dataset2 |
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| Row | STUDYID | DOMAIN | ARMCD | ARM | TAETORD | ETCD | ELEMENT | TABRANCH | TATRANS | EPOCH |
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| 1 | TOB1 | TA | UB | Usual Brand of Tobacco | 1 | SCRN | Screen |
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| SCREENING | | 2 | TOB1 | TA | UB | Usual Brand of Tobacco | 2 | RI | Run-In | Randomized to Usual Brand of Tobacco |
| RUN-IN | | 3 | TOB1 | TA | UB | Usual Brand of Tobacco | 3 | UB | Usual Brand of Tobacco |
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| STUDY PRODUCT TESTING | | 4 | TOB1 | TA | UB | Usual Brand of Tobacco | 4 | FU | Follow-Up |
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| FOLLOW-UP | | 5 | TOB1 | TA | TOBP A | Tobacco Product A | 1 | SCRN | Screen |
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| SCREENING | | 6 | TOB1 | TA | TOBP A | Tobacco Product A | 2 | RI | Run-In | Randomized to TOBP Tobacco Product A |
| RUN-IN | | 7 | TOB1 | TA | TOBP A | Tobacco Product A | 3 | TOBP A | Tobacco Product A |
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| STUDY PRODUCT TESTING | | 8 | TOB1 | TA | TOBP A | Tobacco Product A | 4 | FU | Follow-Up |
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| FOLLOW-UP | | 9 | TOB1 | TA | TOBP B | Tobacco Product B | 1 | SCRN | Screen |
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| SCREENING | | 10 | TOB1 | TA | TOBP B | Tobacco Product B | 2 | RI | Run-In | Randomized to TOBP Tobacco Product B |
| RUN-IN | | 11 | TOB1 | TA | TOBP B | Tobacco Product B | 3 | TOBP B | Tobacco Product B |
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| STUDY PRODUCT TESTING |
| TOB1 | TA | TOBP B | Tobacco Product B | 4 | FU | Follow-Up |
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| FOLLOW-UP |
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