Weirdly enough, actual lifespan comparisons seem to be very hard to find. Studies showing slightly higher disease (4%) rates. Higher rates of eating things their owner didn’t give them. Higher dangers from traffic, cars, etc. but I have yet to an actual study with lifespan numbers, let alone the 3-5 yrs vs 10-15 I’ve seen bandied about.

I’m still looking for it as a lower lifespan sounds logical, but I’ve seen enough things defy apparent logic to not just accept the statement without supporting documentation.

Let me clear. I support in principle the statement that indoor cats live longer, I just haven’t found the proof for it yet.