Why don’t all of the diagnoses show a level of evidence (LOE)?
NANDA International

NANDA International did not begin using LOE criteria until 2002; therefore diagnoses that were entered into the Taxonomy prior to that time do not show a LOE  criteria because none was identified when the diagnoses were submitted.  All diagnoses that existed in the Taxonomy in 2002 were “grandfathered” into the Taxonomy, with those clearly not meeting criteria (e.g., no identified related factors, multiple diagnostic foci in the label, etc.) targeted for revision or removal over the next few editions. The last of these diagnoses is being removed in this edition.
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