Research Workbench

Repeated-visit coverage grid

Audit expected visit labels and duplicate participant–visit keys in synthetic records.

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First row expected visits separated by |; remaining synthetic ID, visit

Use synthetic IDs only. Expected visit names are case-sensitive; each following row has exactly ID and visit. This tool checks presence, not whether an outcome at the visit is complete.

The starting values are hypothetical. Results update as you edit. Use aggregate or synthetic inputs only.

Calculation results

Observed IDs: 2
Expected ID–visit combinations: 6
Missing combinations: A:week8 | B:week4
Duplicate keys: ["B","week8"]
Unknown visits: None

How to interpret the output

Coverage is evaluated for every observed ID against every expected visit. Duplicate keys and unknown visits are listed separately. Participants entirely absent from the input cannot be detected without a roster; missed visits may be appropriate after withdrawal, so reconcile status before labeling an error.

Method reference

Source checked 2026-11-06. Read the reproducible calculator validation report.