Assumptions such as 1) JWs around the world tend to accept/reject blood similar to JWs in New Zealand, 2) the frequency of JWs worldwide suffering severe anemia is similar to JWs in New Zealand (adjusted for Maori ethnicity), 3) New Zealand’s healthcare is not less than the rest of the world on average, and a few others spoken of throughout this discussion.
These assumptions are naive in the extreme. You keep repeating them without an evident awareness of variations in accessibility of health care from country to coutnry.
There are huge variations in the accessibility of health care not just from country to country but within countries.
The clinical literature on health care utilization treats these issues as fundamentals - you gloss over them.
Accepting/rejecting blood "around the world" depends crucially on how accessible health care in various other countries. The asumption about the frequency (or to use a better term. "the incidence") of JWs wordlwide suffering from severe anemia to JWs in New Zealand is laughably naive. How do you know? For goodness sake, Marvin, right here in New Zealand the incidence of anemia differs widely across socio-economic groups (i.e., those from lower socioeconomic regions are more likely to suffer from blood disorders - but that is quite a different aspect than whether and to what extent they access health treatment for it in a timely manner).
It is unsafe to make the kinds of extrapolations you have.
Yes, New Zealand has 80 hospitals but only 6 or 7 District Health Boardswhich individually govern several hospitals accroding to region and who disseminate information on "sentinel events".
A confidence level of 0.05 means nothing if the extrapolations are in question - as they definitely are in this case.