it probably depends on the savvy-ness of the cat, no? We've always had indoor/outdoor cats and they've all lived to about 15 years. I have one cat that I got from the SPCA after he was hit by a car. He's a tom through and through so he was hit by a car again before I moved into a condo where he's got hardly any outdoor access. I doubt he'd still be alive if I didn't move, he's not the brightest light on the street!