Table 3.

Our rules and criteria to determine levels of change in radiology report summaries

Change class	Rule
New or worse	Presence of “new”, “increase”, “develop”, “progress”, and “more” in positive context
Unchanged	Presence of “new”, “increase”, “develop”, “progress”, and “more” in negative context Presence of “change” in negative context Presence of “stable”, “remain”, and “persist”
Improved	Presence of “improve” and “decrease”
Indeterminate	Absence of other criteria