The Improving Veteran Access to Integrated Management of Back Pain (AIM-Back) pragmatic, embedded, cluster-randomized trial is ongoing with enrollment starting in February 2020 and projected to end in first quarter of 2024. The 3-month follow up rate of primary outcome data collected as part of an AIM-Back clinical follow-up visit in the electronic health record has been lower than anticipated. At the recommendation of AIM-Back monitoring partners an updated statistical analysis plan was generated. The updated analysis plan allows for use of survey data to augment the follow up rate for the primary outcomes collected in the electronic health record. This updated statistical analysis plan was created and approved prior to completing enrollment and described in this paper.

The authors have declared no competing interest.

https://pubmed.ncbi.nlm.nih.gov/33313728/

National Institutes of Health/National Center for Complementary and Integrative Health by UG3/UH3 grant AR009790

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The Institutional Review Boards of Duke University and Durham VA Medical center gave ethical approval for this work

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