Here are the cites from the article Buz pointed out.
10. The Adventist Health Study, School of Health, Loma Linda University, Loma Linda, California, 1978.
11. J. Berkel and F. DeWaard, “Mortality Pattern and Life Expectancy of Seventh-day Adventists in the Netherlands,” International Journal of Epidemiology 12 (1983):455-459.
12. H. Waaler and P. F. Hjort, “Hoyere levealder hos Norske Adventister 1960-1977: Er budskap om livstil og hels? (Low Mortality Among Norwegian Seventh-day Adventists, 1960-1977: A Message on Lifestyle and Health),” Tedsskr Nor Laegeforen 101 (1981): 623-627.
13. W. Jedrychowski, B. Tobiasz-Adamczyk, A. Olma, and P. Gradziliewicz, “Survival Rates Among Seventh-day Adventists Compared With the General Population in Poland,” Scandinavian Journal of Socialised Medicine, 13 (1985): 49-52.
Here's the abstract for the second cite.
It appears the authors concluded that "no cigarette smoking" was the reason SDA live longer (with a smidge of less colon cancer thrown in).
I'd like to note that in the 24 years since this paper was published, it has been cited 3 times.
The first cite is not to be found in pubmed.
This cite, however, is found in pubmed: Serum cholesterol levels of Seventh-day Adventists.
Nothing special in these results. SDA not so different from ordinary folks.
And there is
this cite in pubmed: Blood pressure in Seventh-day Adventist vegetarians.
Again. Nothing special. SDA bp was less than ordinary folks, but the authors don't have any specific reason why.
It appeared unlikely that these differences could be explained by differences in alcohol, tobacco, tea, coffee or egg consumption, socioeconomic status or physical activity.
The third cite, again. Nowhere to be found.
However,
this cite is a reprint of an
American Journal of Epidemiology article entitled: Coronary Risk Factors in Norwegian Seventh-day Adventists: A Study of 247 Seventh-day Adventists and Matched Controls.
No difference in men, some in women.
The fourth cite can be found
here.
SDA men and women live longer. This one held up to its promise.
But I also found
this: Cancer incidence in norwegian seventh-day adventists 1961 to 1986. Is the cancer-life-style association overestimated?
Nada. Bupkis. SDA no better than general population.
I'm sure I could keep looking, but so far, the evidence is far from overwhelming. I would even venture to say inconclusive.