Dear Dorothy, Rergarding your request on statistical package, you may find the following useful. Statsdirect, developed by a clinician in the UK is a user friendly software that offers both basic and advanced statistical options. It has functions with speecific reference to EBM such as NNT, LLR, CIs etc. There is also a tutorial back up support. The department of Internal Medicine in our medical school has decided to order three copies from their research budget for individual clinicians. You can purchase the software on line and download it from the WWW. You can also download a trial version to explore what it offers from their home page at http://www.statsdirect.com/ Hope this helps. (I have no financial interests/links in/with Stats Direct) With warm regards, Badri Dr.P.Badrinath M.D.,M.Phil.,(Epid) PhD(Cantab) Clinical Assistant Professor and Epidemiologist, Department of Community Medicine, UAE University, PO Box 17666, Al Ain, United Arab Emirates. Tel: 00 971 3 7039 652 Fax: 00 971 3 7672022. [log in to unmask] "For an excellent review of the current medical literature, go to Journals Scan www.uaeu.ac.ae/jscan/index.htm" - BMJ 3rd June 2000,Reviews(Netlines) _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%