Documentation-type question related to AFINN-en-165

[WOStavelot]

I have been using AFINN-en-165.
I include below one example, followed by my question:

Day 0:
Subject ID#: Min-EAD-1975
Text:
Generally OK but woke early with a headache. Sleep not as restful as it usually is at the moment. Might be going into a dip.
Felt particularly stressed/anxious this morning but calmer now.
Mainly bed bound - as I have been for the past few weeks. Can sit up fine, though.
I have posted about it in two different Facebook groups.

Results {"verdict"):
"POSITIVE",
"score": 2,
"comparative": 0.034482758620689655,
"positive": [
"fine",
"restful"
],
"negative": [
"headache"
]
}

Q: What is the "comparative" term: and what does its value of 0.03448 etc
compare to?

Thank you for any reply.