Rhubarb "A risk factor is not the same as saying that ff babies are twice as likely to die from cot death as bf babies. I would want to know how many babies they studied, for how long and where from. Because it's very easy and dangerous to make such bold statements, but when you read the small print, one study isn't sufficient evidence for such a statement and it does kinda seem as though it's being used as a stick with which to beat mothers who ff."
It was not based on one study. If you really want to know, here is the reference to the meta-analysis which came to that conclusion:
McVea KL, Turner PD, Peppler DK. The role of breastfeeding in sudden infant death syndrome. J Hum Lact. 2000; 16: 13-20. jhl.sagepub.com/cgi/content/abstract/16/1/13
The results of that were confirmed in another, more recent, meta-analysis:
Ip S, Chung M, Raman G, Chew P, Magula N, DeVine D, et al. Breastfeeding and maternal and infant health outcomes in developed countries. Evidence report/technology assessment No. 153 (prepared by Tufts-New England Medical Center Evidence-based Practice Center, under contract No. 290-02-0022) Agency for Healthcare Research and Quality; 2007. p. 1-186. www.ahrq.gov/clinic/tp/brfouttp.htm