http://www.childrens-mercy.org/stats/definitions.asp

This is the second site that came up on a google search of "odds ratio". It 
is "Steve's attempts to teach statistics". There is a lot of good 
information.
The example given for Odds Ratios is even about breastfeeding!
Lisa Amir
MBBS, MMed, IBCLC in Melbourne, Australia 

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