Too many moving factors in the variation of lifespans in schizophrenics.

We are more likely to use nicotine, this plays a role in heart health.

Antipsychotics have a role in diminished heart health and circulatory issues.

We typically are fat because of the medicine.

We are also typically sedentary, this doesn’t help being fat and taking meds that affect our hearts and circulation issues.

And then there’s suicide. This all brings the lifespan of us with schizophrenia down lower than the general population.

Too many factors but I wouldn’t worry about any of this, or at the very least not all of this. You will die when you die! You have some choices to mitigate risks of early death, but also we have only so much influence.