2006 Mazda 6 Low Compression and bad Catalytic Converters

I was in a front end collision June 2008 and as a result of the accident, one of the things that I had a problem with was the code indicating bad o2 sensors. Both were replaced a month after the accident and I haven't had any codes, check engine light, or over hearting issues since then. About 18,000 miles later (a year later) I was going 80 mph down the interstate and the car lost all power. Long story short we replaced the catalytic convertors and the battery to now find that the engine has low compression in 5 of the 6 cylinders. My question is could this be a cause of the accident and the faulty o2 sensors?