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clinical research · trial reporting

Three-arm CONSORT flow diagram

A three-arm CONSORT flow diagram extends the usual parallel trial structure by adding one allocation branch. The enrollment section records who was assessed, excluded, and randomized. Each arm then needs its own allocation, follow-up, and analysis counts. Put the treatment or dose name in the allocation box so readers can match the branch to the study methods. If participants discontinue or are excluded from analysis, record the count and reason in the correct branch. Keeping each arm aligned beneath randomization makes it easy to compare retention and analysis populations across all groups. Use the final counts that correspond to the analysis described in the results.

Tipo Diagramma di flussoStandard Sugiyama layered DAG + orthogonal routingMotore schematex-flowchartAggiornato 24/09/2026
Three-arm randomized trial participant flow
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La richiesta

“Draw a three-arm CONSORT flow diagram with 210 assessed, 30 excluded, 180 randomized equally to dose A, dose B, and placebo, then completed follow-up counts of 57, 55, and 58 and matching analysis counts.”

Prova alloraAdd a discontinuation reason for dose B.Change placebo allocation to 70 participants.
Cosa contiene questo disegno

Leggi le decisioni che ne stanno alla base.

01Common entry

Keep screening and randomization together before branches.

02Equal allocation

Label the assigned count for every arm.

03Parallel follow-up

Show completion separately in each arm.

04Final analysis

Keep analysed counts directly below their arm.

Use this for trials comparing two active doses with placebo or any other three parallel treatment groups.

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FAQ

Domande frequenti

Can a CONSORT diagram show three study arms?

Yes. Add a parallel branch for each allocation arm and continue each through follow-up and analysis.

Where do dose names go?

Put them in the allocation labels so each branch clearly identifies its intervention.

How should follow-up be reported?

Give the completed, lost, or discontinued counts separately for every arm.