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| From | "tiong21@netzero.net" <tiong21@netzero.net> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | st: higher occurrence of disease X in rare disease Y |
| Date | Thu, 5 Dec 2013 14:08:55 GMT |
The prevalence of disease (X) is 1 in 36 in the general population. In a sample population with a very rare disease (Y) of unknown etiology, the prevalence of disease X is 1 in 6 ( ie: 1 case of X was found in the sample population of 6 rare cases of disease Y. How do I show statistically that this higher occurrence of disease X in rare disease Y is not due to chance? And as a corollary suggest that disease X may be a contributory factor in the etiology of disease Y (an issue of causality). Furthermore, should a Poisson distribution be used to calculate the probabilities? A sample Stata script will be much appreciated. Tiong The tiong21@netzero.net * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/