PT & PAHUD Busted Flush Draw River Bet Stat

Recently registered PT & PAHUD, and I'm still learning the ropes.

One piece of info that I would find extremely useful is how often my opponents will try and bluff on the river w/ a busted draw.

On PAHUD I saw a stat called "river bet aggression." Does anyone know the parameters for this stat, and if it can be used to determine the likelyhood of busted draw bluffs on the river?

Thanks