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Table 2 Example evolution of a question through the Delphi process

From: Standardizing evaluation of patient-specific 3D printed models in surgical planning: development of a cross-disciplinary survey tool for physician and trainee feedback

Original survey question

The model reflects the region of interest’s relationship to other structures (Strongly disagree = 1, Disagree = 2, Neutral = 3, Agree = 4, Strongly agree = 5)

Feedback questions

-          This question is clear (Strongly disagree = 1, Disagree = 2, Neutral = 3, Agree = 4, Strongly agree = 5)

-          This question is relevant (Strongly disagree = 1, Disagree = 2, Neutral = 3, Agree = 4, Strongly agree = 5)

-          This question should be… (Retained as-is, Reviewed, Removed)

-          Comments

Feedback results

-          This question is clear – 42% of experts strongly agreed the question was clear (average = 4.2)

-          This question is relevant – 50% of experts strongly agreed the question was relevant (average = 4.0)

-          This question should be … - majority of experts (75%) believed the question should be retained as-is (75%)

Feedback comments

-          “perhaps reword: The model reflects anatomic structures’ relationships with each other”

-          “if the model is made without any of those structures, you won’t have any information about surrounding structures”

Outcome

Original survey question edited to clarify keywords and address comments