Not reported
is its own answer.
When a document doesn't address a question, your codebook should define what to write. That specification dramatically reduces hallucinations.
field Did the authors describe a power calculation?
Yes
the paper clearly describes one
No
the paper clearly says none was done
Not reported
the paper doesn't say either way
Not applicable
this design wouldn't have one
Absence is information.
Record it as absence.
@karlrohe