"Most of the drugs we give don't increase mortality."
Being overweight does not increase mortality in older people.
This was bound to produce conditions that would increase sickness and mortality.
Nonetheless, some recent studies tend to show that antioxidant therapy have no effect and can even increase mortality.
Heavy alcohol use also increases mortality among poly-drug users.
Any major surgery involves the potential for complications-adverse events which increase risk, hospital stay, and mortality.
Recent studies have shown that people with depression have increased mortality after heart attacks, and it is not linked to habits like exercise or smoking.
Well controlled studies have shown that these drugs generally increase mortality, so they have to be applied under close observation.
For example, a hypothetical gene might increase mortality and also cause people to smoke more.
Roads may be easy routes for dispersal, but those with heavy automobile use may increase mortality.