I haven’t seen anyone demonstrate any assumption on my part that has not always been a part of my extrapolation.
That the 7.5 million current / ~30 million total-ever JWs have the same increased risk of death as the 19 out of 103 patients who refused blood at the NZ hospitals used in the study.
I find the math approach a little simplistic as it doesn't cater for all the changing circumstances throughout the years (either belief, legalities or medical treatment options).
But in the world I live in people are dying all around me and I’m tired of it.
If that is true and not hyperbole then you will have current hard facts of recent data to point to and incorporate into your model.