"At the same time, however, the authors admit that only a few of the studies were actually designed to test for whether religion had any influence on health - that means any conclusions drawn from the other studies must be regarded as somewhat tenuous. In fact, most of the beneficial findings they report seem to be anecdotal or serendipitous — considering just how much research is covered, the book doesn't provide a great deal of support for those sympathetic to the idea that religion is important to good health"
Review by Austin Cline
The authors of Handbook of Religion and Health acknowledge that what data does exist does not point exclusively towards positive benefits for religion; sometimes, studies show a very negative effect on health from religion. This is an important inclusion because, in the current atmosphere, we hear very little about such negative relationships.
http://atheism.about....r/HandbkRelHealth.htm
Dependens what you call definative and what you wish to cherry pick.