Marvin:
If you have not read it, then how would you possibly know whether the study contains insufficient information?
Marvin: I have not read it, but several things occurred to me in reading your blog about it. You seem to have made a lot of assumptions based on this fairly small study.
You seem to assume that all hospitals in New Zealand have severe anemia cases in equal ratios as the four hospitals used for the study. All hospitals are not the same, those in the study might have been selected because they had acute trauma centers, who would be expected to get more accident cases, thus more cases of severe anemia. They were public hospitals, maybe they got a higher percentage of poorer patients, who might be expected to have more severe medical issues due to lack of education, or access. They might also get less cases, who knows? Have you read the study and do you know why those hospitals were chosen?
You are then assuming that all populations in the earth have the same ratio of severe anemia cases, which I think needs to be proven. That is a pretty huge jump. You seem to be assuming that all Jehovah's Witness populations have access to hospitals, medical care and blood transfusions, equal to the four hospitals in the study. Populations in wealthier countries get far more blood transfusion, so I doubt JWs in poor African countries even have the opportunity to get one in the first case.
You are assuming that all Jehovah's Witnesses in all parts of the earth refuse blood transfusions in the same ratio as the four hospitals in the study. Anecdotal evidence is that some JWs get the transfusion and don't tell the elders. Jehovah's Witnesses in other countries may have a different culture, in some ways, where they don't emphasize the blood issue as much. I noticed different attitudes even within my state (California) about the blood issue.
Mainly I just think it is impossible to take one study, where only 19 JW patients died, and extrapolate that to 50K worldwide. That is just too small group to make it meaningful. A small anomaly in the way one or two patients were selected could throw off your numbers by thousands and thousands.
That is not to say that you don't have a great idea, I think we do need to get this out in the open, I just think there needs to be more proof before we start throwing numbers around. The study, on its own, is pretty powerful stuff.