A while back I got curious and tried to do a bit of digging on this. I looked into the Hutterites in Canada as a group that lives a somewhat similar lifestyle,

A while back I got curious and tried to do a bit of digging on this. I looked into the Hutterites in Canada as a group that lives a somewhat similar lifestyle, but don't entirely eschew modern technology and have free access to healthcare (where-as the Amish largely self-fund as a community, and I'm not sure how much pressure that would put on _not_ using healthcare services). In that case, the only real causes of death that showed a substantial difference from the surrounding population were the rates of cancer, and mostly the lung cancer for men and cervical cancer for women. The study didn't directly attribute it, but that would be pretty directly explained by lower rates of smoking and a lower rate of STDs (since we now know that a huge driver of cervical cancer is HPV).