Do Italian threaded BB's tend to work themselves loose faster due to the threading?

I was doing the Montauk Century yesterday and looked down and noticed my bottom bracket had worked itself loose. Of course I didn't bring a crank puller or a bottom bracket tool with me so I had to sort of baby it for 40 miles till I found a bike shop. I must have not tightened it down well when I first assembled the bike a few weeks ago but I've never seen this happen before.