script to see if dar incremental backup recorded any changes

What is the most robust and fastest way to check if a dar incremental
backup recorded any changes?

I could do:
dar -l backup -q

and parse the output with awk to see if any of the lines "fully saved",
"binary delta patch" or "inode metadata only" contain non-0 counts.
And then also check the "N file(s) have been recorded as destroyed..."
line.

This however seems a bit fragile, as it depends on the format of the
summary staying the same.  Is there a better way?