Visit Schedules and Longitudinal Data Collection
Table 1
Table
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Table 1
Table
Table 1
| Design question | Example consideration |
|---|---|
| Which visits are expected? | Screening, enrollment, day 7, day 28, close-out |
| What visit windows are allowed? | Day 28 visit may be valid from day 25 to day 35 |
| Which variables repeat? | Vital signs, symptoms, laboratory results, adverse events |
| Which variables are collected once? | Date of birth, sex, baseline residence |
| How are missed visits recorded? | Missed, refused, unable to contact, died, transferred |
| Are unscheduled visits expected? | Sick visits, emergency visits, additional laboratory tests |
| What structure supports analysis? | Long format, repeated instruments, REDCap events |